03baef1c9c
This adds =all and =strong, with obvious semantics, defaulting to off. We don't validate the value of the option yet: that's in a later patch. Nor do we use it for anything at this stage. We differentiate between 'the compiler understands -fstack-protector' and 'the user wanted -fstack-protector' so that we can pass -fno-stack-protector in appropriate places even if the user didn't want to turn on -fstack-protector for other parts. (This helps us overcome another existing limitation, that glibc doesn't work with GCCs hacked to pass in -fstack-protector by default.) We also arrange to set the STACK_PROTECTOR_LEVEL #define to a value appropriate for the stack-protection level in use for each file in particular.
1950 lines
57 KiB
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1950 lines
57 KiB
Plaintext
dnl Process this file with autoconf to produce a configure script.
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dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead.
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AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc])
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AC_CONFIG_SRCDIR([include/features.h])
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AC_CONFIG_HEADERS([config.h])
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AC_CONFIG_AUX_DIR([scripts])
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ACX_PKGVERSION([GNU libc])
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ACX_BUGURL([http://www.gnu.org/software/libc/bugs.html])
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AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"],
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[Package description])
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AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"],
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[Bug reporting address])
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# Glibc should not depend on any header files
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AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS],
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[m4_divert_text([DEFAULTS],
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[ac_includes_default='/* none */'])])
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# We require GCC, and by default use its preprocessor. Override AC_PROG_CPP
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# here to work around the Autoconf issue discussed in
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# <http://sourceware.org/ml/libc-alpha/2013-01/msg00721.html>.
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AC_DEFUN([AC_PROG_CPP],
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[AC_REQUIRE([AC_PROG_CC])dnl
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AC_ARG_VAR([CPP], [C preprocessor])dnl
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_AC_ARG_VAR_CPPFLAGS()dnl
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# On Suns, sometimes $CPP names a directory.
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if test -n "$CPP" && test -d "$CPP"; then
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CPP=
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fi
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if test -z "$CPP"; then
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CPP="$CC -E"
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fi
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AC_SUBST(CPP)dnl
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])# AC_PROG_CPP
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# We require GCC. Override _AC_PROG_CC_C89 here to work around the Autoconf
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# issue discussed in
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# <http://sourceware.org/ml/libc-alpha/2013-01/msg00757.html>.
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AC_DEFUN([_AC_PROG_CC_C89], [[$1]])
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dnl This is here so we can set $subdirs directly based on configure fragments.
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AC_CONFIG_SUBDIRS()
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AC_CANONICAL_HOST
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AC_PROG_CC
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if test $host != $build; then
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AC_CHECK_PROGS(BUILD_CC, gcc cc)
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fi
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AC_SUBST(cross_compiling)
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AC_PROG_CPP
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AC_CHECK_TOOL(READELF, readelf, false)
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# We need the C++ compiler only for testing.
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AC_PROG_CXX
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# It's useless to us if it can't link programs (e.g. missing -lstdc++).
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AC_CACHE_CHECK([whether $CXX can link programs], libc_cv_cxx_link_ok, [dnl
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AC_LANG_PUSH([C++])
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# Default, dynamic case.
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AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
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[libc_cv_cxx_link_ok=yes],
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[libc_cv_cxx_link_ok=no])
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# Static case.
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old_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -static"
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AC_LINK_IFELSE([AC_LANG_SOURCE([
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#include <iostream>
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int
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main()
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{
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std::cout << "Hello, world!";
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return 0;
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}
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])],
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[],
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[libc_cv_cxx_link_ok=no])
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LDFLAGS="$old_LDFLAGS"
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AC_LANG_POP([C++])])
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AS_IF([test $libc_cv_cxx_link_ok != yes], [CXX=])
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if test "`cd $srcdir; pwd -P`" = "`pwd -P`"; then
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AC_MSG_ERROR([you must configure in a separate build directory])
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fi
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# This will get text that should go into config.make.
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config_vars=
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# Check for a --with-gd argument and set libgd-LDFLAGS in config.make.
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AC_ARG_WITH([gd],
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AC_HELP_STRING([--with-gd=DIR],
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[find libgd include dir and library with prefix DIR]),
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[dnl
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case "$with_gd" in
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yes|''|no) ;;
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*) libgd_include="-I$withval/include"
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libgd_ldflags="-L$withval/lib" ;;
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esac
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])
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AC_ARG_WITH([gd-include],
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AC_HELP_STRING([--with-gd-include=DIR],
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[find libgd include files in DIR]),
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[dnl
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case "$with_gd_include" in
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''|no) ;;
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*) libgd_include="-I$withval" ;;
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esac
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])
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AC_ARG_WITH([gd-lib],
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AC_HELP_STRING([--with-gd-lib=DIR],
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[find libgd library files in DIR]),
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[dnl
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case "$with_gd_lib" in
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''|no) ;;
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*) libgd_ldflags="-L$withval" ;;
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esac
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])
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if test -n "$libgd_include"; then
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config_vars="$config_vars
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CFLAGS-memusagestat.c = $libgd_include"
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fi
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if test -n "$libgd_ldflags"; then
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config_vars="$config_vars
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libgd-LDFLAGS = $libgd_ldflags"
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fi
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dnl Arguments to specify presence of other packages/features.
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AC_ARG_WITH([fp],
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AC_HELP_STRING([--with-fp],
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[if using floating-point hardware @<:@default=yes@:>@]),
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[with_fp=$withval],
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[with_fp=yes])
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AC_SUBST(with_fp)
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AC_ARG_WITH([binutils],
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AC_HELP_STRING([--with-binutils=PATH],
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[specify location of binutils (as and ld)]),
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[path_binutils=$withval],
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[path_binutils=''])
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AC_ARG_WITH([selinux],
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AC_HELP_STRING([--with-selinux],
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[if building with SELinux support]),
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[with_selinux=$withval],
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[with_selinux=auto])
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AC_ARG_WITH([headers],
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AC_HELP_STRING([--with-headers=PATH],
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[location of system headers to use
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(for example /usr/src/linux/include)
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@<:@default=compiler default@:>@]),
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[sysheaders=$withval],
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[sysheaders=''])
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AC_SUBST(sysheaders)
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AC_SUBST(use_default_link)
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AC_ARG_WITH([default-link],
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AC_HELP_STRING([--with-default-link],
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[do not use explicit linker scripts]),
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[use_default_link=$withval],
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[use_default_link=default])
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AC_ARG_ENABLE([sanity-checks],
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AC_HELP_STRING([--disable-sanity-checks],
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[really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
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[enable_sanity=$enableval],
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[enable_sanity=yes])
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AC_ARG_ENABLE([shared],
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AC_HELP_STRING([--enable-shared],
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[build shared library @<:@default=yes if GNU ld@:>@]),
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[shared=$enableval],
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[shared=yes])
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AC_ARG_ENABLE([profile],
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AC_HELP_STRING([--enable-profile],
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[build profiled library @<:@default=no@:>@]),
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[profile=$enableval],
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[profile=no])
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AC_ARG_ENABLE([timezone-tools],
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AC_HELP_STRING([--disable-timezone-tools],
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[do not install timezone tools @<:@default=install@:>@]),
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[enable_timezone_tools=$enableval],
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[enable_timezone_tools=yes])
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AC_SUBST(enable_timezone_tools)
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AC_ARG_ENABLE([hardcoded-path-in-tests],
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AC_HELP_STRING([--enable-hardcoded-path-in-tests],
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[hardcode newly built glibc path in tests @<:@default=no@:>@]),
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[hardcoded_path_in_tests=$enableval],
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[hardcoded_path_in_tests=no])
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AC_SUBST(hardcoded_path_in_tests)
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AC_ARG_ENABLE([stackguard-randomization],
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AC_HELP_STRING([--enable-stackguard-randomization],
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[initialize __stack_chk_guard canary with a random number at program start]),
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[enable_stackguard_randomize=$enableval],
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[enable_stackguard_randomize=no])
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if test "$enable_stackguard_randomize" = yes; then
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AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE)
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fi
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AC_ARG_ENABLE([lock-elision],
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AC_HELP_STRING([--enable-lock-elision[=yes/no]],
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[Enable lock elision for pthread mutexes by default]),
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[enable_lock_elision=$enableval],
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[enable_lock_elision=no])
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AC_SUBST(enable_lock_elision)
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if test "$enable_lock_elision" = yes ; then
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AC_DEFINE(ENABLE_LOCK_ELISION)
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fi
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dnl Generic infrastructure for drop-in additions to libc.
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AC_ARG_ENABLE([add-ons],
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AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@],
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[configure and build add-ons in DIR1,DIR2,...
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search for add-ons if no parameter given]),
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, [enable_add_ons=yes])
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AC_ARG_ENABLE([hidden-plt],
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AC_HELP_STRING([--disable-hidden-plt],
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[do not hide internal function calls to avoid PLT]),
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[hidden=$enableval],
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[hidden=yes])
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if test "x$hidden" = xno; then
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AC_DEFINE(NO_HIDDEN)
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fi
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AC_ARG_ENABLE([bind-now],
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AC_HELP_STRING([--enable-bind-now],
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[disable lazy relocations in DSOs]),
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[bindnow=$enableval],
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[bindnow=no])
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AC_SUBST(bindnow)
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if test "x$bindnow" = xyes; then
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AC_DEFINE(BIND_NOW)
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fi
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dnl Build glibc with -fstack-protector, -fstack-protector-all, or
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dnl -fstack-protector-strong.
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AC_ARG_ENABLE([stack-protector],
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AC_HELP_STRING([--enable-stack-protector=@<:@yes|no|all|strong@:>@],
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[Use -fstack-protector[-all|-strong] to detect glibc buffer overflows]),
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[enable_stack_protector=$enableval],
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[enable_stack_protector=no])
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case "$enable_stack_protector" in
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all|yes|no|strong) ;;
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*) AC_MSG_ERROR([Not a valid argument for --enable-stack-protector: \"$enable_stack_protector\"]);;
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esac
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dnl On some platforms we cannot use dynamic loading. We must provide
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dnl static NSS modules.
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AC_ARG_ENABLE([static-nss],
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AC_HELP_STRING([--enable-static-nss],
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[build static NSS modules @<:@default=no@:>@]),
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[static_nss=$enableval],
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[static_nss=no])
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dnl Enable static NSS also if we build no shared objects.
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if test x"$static_nss" = xyes || test x"$shared" = xno; then
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static_nss=yes
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AC_DEFINE(DO_STATIC_NSS)
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fi
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AC_ARG_ENABLE([force-install],
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AC_HELP_STRING([--disable-force-install],
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[don't force installation of files from this package, even if they are older than the installed files]),
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[force_install=$enableval],
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[force_install=yes])
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AC_SUBST(force_install)
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AC_ARG_ENABLE([maintainer-mode],
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AC_HELP_STRING([--enable-maintainer-mode],
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[enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]),
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[maintainer=$enableval],
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[maintainer=no])
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dnl On some platforms we allow dropping compatibility with all kernel
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dnl versions.
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AC_ARG_ENABLE([kernel],
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AC_HELP_STRING([--enable-kernel=VERSION],
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[compile for compatibility with kernel not older than VERSION]),
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[minimum_kernel=$enableval],
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[])
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dnl Prevent unreasonable values.
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if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then
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# Better nothing than this.
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minimum_kernel=""
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else
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if test "$minimum_kernel" = current; then
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minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel=
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fi
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fi
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dnl For the development we sometimes want gcc to issue even more warnings.
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dnl This is not the default since many of the extra warnings are not
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dnl appropriate.
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AC_ARG_ENABLE([all-warnings],
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AC_HELP_STRING([--enable-all-warnings],
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[enable all useful warnings gcc can issue]),
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[all_warnings=$enableval],
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[])
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AC_SUBST(all_warnings)
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AC_ARG_ENABLE([werror],
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AC_HELP_STRING([--disable-werror],
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[do not build with -Werror]),
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[enable_werror=$enableval],
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[enable_werror=yes])
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AC_SUBST(enable_werror)
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AC_ARG_ENABLE([multi-arch],
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AC_HELP_STRING([--enable-multi-arch],
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[enable single DSO with optimizations for multiple architectures]),
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[multi_arch=$enableval],
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[multi_arch=default])
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AC_ARG_ENABLE([nss-crypt],
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AC_HELP_STRING([--enable-nss-crypt],
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[enable libcrypt to use nss]),
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[nss_crypt=$enableval],
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[nss_crypt=no])
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if test x$nss_crypt = xyes; then
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nss_includes=-I$(nss-config --includedir 2>/dev/null)
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if test $? -ne 0; then
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AC_MSG_ERROR([cannot find include directory with nss-config])
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fi
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old_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $nss_includes"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
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#include <hasht.h>
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#include <nsslowhash.h>
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void f (void) { NSSLOW_Init (); }])],
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libc_cv_nss_crypt=yes,
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AC_MSG_ERROR([
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cannot find NSS headers with lowlevel hash function interfaces]))
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old_LIBS="$LIBS"
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old_LDFLAGS="$LDFLAGS"
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LIBS="$LIBS -lfreebl3"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
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#include <hasht.h>
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#include <nsslowhash.h>],
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[NSSLOW_Init();])],
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libc_cv_nss_crypt=yes,
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AC_MSG_ERROR([
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cannot link program using lowlevel NSS hash functions]))
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# Check to see if there is a static NSS cryptographic library.
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# If there isn't then we can't link anything with libcrypt.a,
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# and that might mean disabling some static tests.
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LDFLAGS="$LDFLAGS -static"
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AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool;
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#include <hasht.h>
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#include <nsslowhash.h>],
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[NSSLOW_Init();])],
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libc_cv_static_nss_crypt=yes,
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libc_cv_static_nss_crypt=no)
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LDFLAGS="$old_LDFLAGS"
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CFLAGS="$old_CFLAGS"
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LIBS="$old_LIBS"
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else
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libc_cv_nss_crypt=no
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libc_cv_static_nss_crypt=no
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fi
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AC_SUBST(libc_cv_nss_crypt)
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AC_SUBST(libc_cv_static_nss_crypt)
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AC_ARG_ENABLE([obsolete-rpc],
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AC_HELP_STRING([--enable-obsolete-rpc],
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[build and install the obsolete RPC code for link-time usage]),
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[link_obsolete_rpc=$enableval],
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[link_obsolete_rpc=no])
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AC_SUBST(link_obsolete_rpc)
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if test "$link_obsolete_rpc" = yes; then
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AC_DEFINE(LINK_OBSOLETE_RPC)
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fi
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AC_ARG_ENABLE([systemtap],
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[AS_HELP_STRING([--enable-systemtap],
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[enable systemtap static probe points @<:@default=no@:>@])],
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[systemtap=$enableval],
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[systemtap=no])
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if test "x$systemtap" != xno; then
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AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl
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old_CFLAGS="$CFLAGS"
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CFLAGS="-std=gnu11 $CFLAGS"
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h>
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void foo (int i, void *p)
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{
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asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) ""
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:: STAP_PROBE_ASM_OPERANDS (2, i, p));
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}]])], [libc_cv_sdt=yes], [libc_cv_sdt=no])
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CFLAGS="$old_CFLAGS"])
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if test $libc_cv_sdt = yes; then
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AC_DEFINE([USE_STAP_PROBE])
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elif test "x$systemtap" != xauto; then
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AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support])
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fi
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fi
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AC_ARG_ENABLE([build-nscd],
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[AS_HELP_STRING([--disable-build-nscd],
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[disable building and installing the nscd daemon])],
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[build_nscd=$enableval],
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[build_nscd=default])
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AC_SUBST(build_nscd)
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# Note the use of $use_nscd is near the bottom of the file.
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AC_ARG_ENABLE([nscd],
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[AS_HELP_STRING([--disable-nscd],
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[library functions will not contact the nscd daemon])],
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[use_nscd=$enableval],
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[use_nscd=yes])
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AC_ARG_ENABLE([pt_chown],
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[AS_HELP_STRING([--enable-pt_chown],
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[Enable building and installing pt_chown])],
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[build_pt_chown=$enableval],
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[build_pt_chown=no])
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AC_SUBST(build_pt_chown)
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if test "$build_pt_chown" = yes; then
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AC_DEFINE(HAVE_PT_CHOWN)
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fi
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# The abi-tags file uses a fairly simplistic model for name recognition that
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# can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a
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# $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell.
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# This doesn't get used much beyond that, so it's fairly safe.
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case "$host_os" in
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linux*)
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;;
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gnu*)
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host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'`
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;;
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esac
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AC_ARG_ENABLE([mathvec],
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[AS_HELP_STRING([--enable-mathvec],
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[Enable building and installing mathvec @<:@default depends on architecture@:>@])],
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[build_mathvec=$enableval],
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[build_mathvec=notset])
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# We keep the original values in `$config_*' and never modify them, so we
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# can write them unchanged into config.make. Everything else uses
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# $machine, $vendor, and $os, and changes them whenever convenient.
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config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os
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# Don't allow vendor == "unknown"
|
|
test "$config_vendor" = unknown && config_vendor=
|
|
config_os="`echo $config_os | sed 's/^unknown-//'`"
|
|
|
|
# Some configurations imply other options.
|
|
elf=yes
|
|
|
|
# The configure fragment of an add-on port can modify these to supplement
|
|
# or override the table in the case statement below. No fragment should
|
|
# ever change the config_* variables, however.
|
|
machine=$config_machine
|
|
vendor=$config_vendor
|
|
os=$config_os
|
|
base_os=''
|
|
|
|
submachine=
|
|
AC_ARG_WITH([cpu],
|
|
AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]),
|
|
[dnl
|
|
case "$withval" in
|
|
yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;;
|
|
no) ;;
|
|
*) submachine="$withval" ;;
|
|
esac
|
|
])
|
|
|
|
# An preconfigure script can set this when it wants to disable the sanity
|
|
# check below.
|
|
libc_config_ok=no
|
|
|
|
dnl Let sysdeps/*/preconfigure act here, like they can in add-ons.
|
|
LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
|
|
|
|
dnl Having this here, though empty, makes sure that if add-ons' fragments
|
|
dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then
|
|
dnl our AC_OUTPUT will actually use it.
|
|
AC_CONFIG_SUBDIRS()
|
|
|
|
case "$enable_add_ons" in
|
|
''|no) add_ons= ;;
|
|
yes|'*')
|
|
add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps |
|
|
sed 's@/[[^/]]*$@@' | sort | uniq`
|
|
add_ons_automatic=yes
|
|
;;
|
|
*) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'`
|
|
add_ons_automatic=no ;;
|
|
esac
|
|
|
|
configured_add_ons=
|
|
add_ons_sfx=
|
|
add_ons_pfx=
|
|
if test x"$add_ons" != x; then
|
|
for f in $add_ons; do
|
|
# Some sanity checks
|
|
case "$f" in
|
|
crypt)
|
|
AC_MSG_ERROR([
|
|
*** It seems that you're using an old \`crypt' add-on. crypt is now
|
|
*** part of glibc and using the old add-on will not work with this
|
|
*** release. Start again with fresh sources and without the old
|
|
*** \`crypt' add-on.])
|
|
;;
|
|
localedata)
|
|
AC_MSG_ERROR([
|
|
*** It seems that you're using an old \`localedata' add-on. localedata
|
|
*** is now part of glibc and using the old add-on will not work with
|
|
*** this release. Start again with fresh sources and without the old
|
|
*** \`localedata' add-on.])
|
|
;;
|
|
esac
|
|
done
|
|
|
|
# Now source each add-on's configure fragment.
|
|
# The fragments can use $srcdir/$libc_add_on to find themselves,
|
|
# and test $add_ons_automatic to see if they were explicitly requested.
|
|
# A fragment can clear (or even change) $libc_add_on to affect
|
|
# whether it goes into the list to be actually used in the build.
|
|
use_add_ons=
|
|
for libc_add_on in $add_ons; do
|
|
# Test whether such a directory really exists.
|
|
# It can be absolute, or relative to $srcdir, or relative to the build dir.
|
|
case "$libc_add_on" in
|
|
/*)
|
|
libc_add_on_srcdir=$libc_add_on
|
|
;;
|
|
*)
|
|
test -d "$srcdir/$libc_add_on" || {
|
|
if test -d "$libc_add_on"; then
|
|
libc_add_on="`pwd`/$libc_add_on"
|
|
else
|
|
AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist)
|
|
fi
|
|
}
|
|
libc_add_on_srcdir=$srcdir/$libc_add_on
|
|
;;
|
|
esac
|
|
|
|
libc_add_on_frag=$libc_add_on_srcdir/configure
|
|
libc_add_on_canonical=
|
|
libc_add_on_config_subdirs=
|
|
if test -r "$libc_add_on_frag"; then
|
|
AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on)
|
|
libc_add_on_canonical=unknown
|
|
libc_add_on_subdirs=
|
|
. "$libc_add_on_frag"
|
|
test -z "$libc_add_on" || {
|
|
configured_add_ons="$configured_add_ons $libc_add_on"
|
|
if test "x$libc_add_on_canonical" = xunknown; then
|
|
AC_MSG_ERROR(fragment must set \$libc_add_on_canonical)
|
|
fi
|
|
for d in $libc_add_on_subdirs; do
|
|
case "$libc_add_on" in
|
|
/*) subdir_srcdir="$libc_add_on" ;;
|
|
*) subdir_srcdir="\$(..)$libc_add_on" ;;
|
|
esac
|
|
case "$d" in
|
|
.)
|
|
d="${libc_add_on_canonical:-$libc_add_on}"
|
|
;;
|
|
/*)
|
|
subdir_srcdir="$d"
|
|
;;
|
|
*)
|
|
subdir_srcdir="$subdir_srcdir/$d"
|
|
;;
|
|
esac
|
|
d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'`
|
|
add_on_subdirs="$add_on_subdirs $d"
|
|
test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars
|
|
$d-srcdir = $subdir_srcdir"
|
|
done
|
|
for d in $libc_add_on_config_subdirs; do
|
|
case "$d" in
|
|
/*) AC_MSG_ERROR(dnl
|
|
fragment uses absolute path in \$libc_add_on_config_subdirs) ;;
|
|
esac
|
|
if test ! -d "$libc_add_on_srcdir/$d"; then
|
|
AC_MSG_ERROR(fragment wants to configure missing directory $d)
|
|
fi
|
|
case "$libc_add_on" in
|
|
/*) AC_MSG_ERROR(dnl
|
|
relative path required for add-on using \$libc_add_on_config_subdirs) ;;
|
|
esac
|
|
subdirs="$subdirs $libc_add_on/$d"
|
|
done
|
|
}
|
|
fi
|
|
if test -n "$libc_add_on"; then
|
|
LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for])
|
|
use_add_ons="$use_add_ons $libc_add_on"
|
|
add_ons_pfx="$add_ons_pfx $libc_add_on/"
|
|
test -z "$libc_add_on_canonical" ||
|
|
add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical"
|
|
fi
|
|
done
|
|
# Use echo to strip excess whitespace.
|
|
add_ons="`echo $use_add_ons`"
|
|
fi
|
|
AC_SUBST(add_ons)
|
|
AC_SUBST(add_on_subdirs)
|
|
|
|
|
|
###
|
|
### By using the undocumented --enable-hacker-mode option for configure
|
|
### one can skip this test to make the configuration not fail for unsupported
|
|
### platforms.
|
|
###
|
|
if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then
|
|
case "$machine-$host_os" in
|
|
*-linux* | *-gnu*)
|
|
;;
|
|
*)
|
|
AC_MSG_ERROR([
|
|
*** The GNU C library is currently unavailable for this platform.
|
|
*** If you are interested in seeing glibc on this platform visit
|
|
*** the "How to submit a new port" in the wiki:
|
|
*** https://sourceware.org/glibc/wiki/#Development
|
|
*** and join the community!])
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
# Set base_machine if not set by a preconfigure fragment.
|
|
test -n "$base_machine" || base_machine=$machine
|
|
AC_SUBST(base_machine)
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
|
|
[libc_cv_ssp=yes],
|
|
[libc_cv_ssp=no])
|
|
])
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong],
|
|
[libc_cv_ssp_strong=yes],
|
|
[libc_cv_ssp_strong=no])
|
|
])
|
|
|
|
AC_CACHE_CHECK(for -fstack-protector-all, libc_cv_ssp_all, [dnl
|
|
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-all],
|
|
[libc_cv_ssp_all=yes],
|
|
[libc_cv_ssp_all=no])
|
|
])
|
|
|
|
stack_protector=
|
|
no_stack_protector=
|
|
if test "$libc_cv_ssp" = yes; then
|
|
no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0"
|
|
fi
|
|
|
|
if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then
|
|
stack_protector="-fstack-protector"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 1)
|
|
elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then
|
|
stack_protector="-fstack-protector-all"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 2)
|
|
elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then
|
|
stack_protector="-fstack-protector-strong"
|
|
AC_DEFINE(STACK_PROTECTOR_LEVEL, 3)
|
|
fi
|
|
AC_SUBST(libc_cv_ssp)
|
|
AC_SUBST(stack_protector)
|
|
AC_SUBST(no_stack_protector)
|
|
|
|
# For the multi-arch option we need support in the assembler & linker.
|
|
AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support],
|
|
libc_cv_ld_gnu_indirect_function, [dnl
|
|
cat > conftest.S <<EOF
|
|
.type foo,%gnu_indirect_function
|
|
foo:
|
|
.globl _start
|
|
_start:
|
|
.globl __start
|
|
__start:
|
|
.data
|
|
#ifdef _LP64
|
|
.quad foo
|
|
#else
|
|
.long foo
|
|
#endif
|
|
EOF
|
|
libc_cv_ld_gnu_indirect_function=no
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
-nostartfiles -nostdlib \
|
|
-o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
# Do a link to see if the backend supports IFUNC relocs.
|
|
$READELF -r conftest 1>&AS_MESSAGE_LOG_FD
|
|
LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || {
|
|
libc_cv_ld_gnu_indirect_function=yes
|
|
}
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
# Check if gcc supports attribute ifunc as it is used in libc_ifunc macro.
|
|
AC_CACHE_CHECK([for gcc attribute ifunc support],
|
|
libc_cv_gcc_indirect_function, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int func (int);
|
|
int used_func (int a)
|
|
{
|
|
return a;
|
|
}
|
|
static void *resolver ()
|
|
{
|
|
return &used_func;
|
|
}
|
|
extern __typeof (func) func __attribute__ ((ifunc ("resolver")));
|
|
EOF
|
|
libc_cv_gcc_indirect_function=no
|
|
if ${CC-cc} -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD \
|
|
2>&AS_MESSAGE_LOG_FD ; then
|
|
if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_gcc_indirect_function=yes
|
|
fi
|
|
fi
|
|
rm -f conftest*])
|
|
|
|
if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then
|
|
if test x"$multi_arch" = xyes; then
|
|
AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support])
|
|
else
|
|
multi_arch=no
|
|
fi
|
|
fi
|
|
if test x"$libc_cv_gcc_indirect_function" != xyes &&
|
|
test x"$multi_arch" = xyes; then
|
|
AC_MSG_WARN([--enable-multi-arch support recommends a gcc with gnu-indirect-function support.
|
|
Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function])
|
|
fi
|
|
multi_arch_d=
|
|
if test x"$multi_arch" != xno; then
|
|
multi_arch_d=/multiarch
|
|
fi
|
|
|
|
# Compute the list of sysdep directories for this configuration.
|
|
# This can take a while to compute.
|
|
sysdep_dir=$srcdir/sysdeps
|
|
AC_MSG_CHECKING(sysdep dirs)
|
|
dnl We need to use [ and ] for other purposes for a while now.
|
|
changequote(,)dnl
|
|
# Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1.
|
|
os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`"
|
|
|
|
test "x$base_os" != x || case "$os" in
|
|
gnu*)
|
|
base_os=mach/hurd ;;
|
|
linux*)
|
|
base_os=unix/sysv ;;
|
|
esac
|
|
|
|
# For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos.
|
|
tail=$os
|
|
ostry=$os
|
|
while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do
|
|
ostry="$ostry /$o"
|
|
tail=$o
|
|
done
|
|
o=`echo $tail | sed 's/[0-9]*$//'`
|
|
if test $o != $tail; then
|
|
ostry="$ostry /$o"
|
|
fi
|
|
# For linux-gnu, try linux-gnu, then linux.
|
|
o=`echo $tail | sed 's/-.*$//'`
|
|
if test $o != $tail; then
|
|
ostry="$ostry /$o"
|
|
fi
|
|
|
|
# For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix.
|
|
base=
|
|
tail=$base_os
|
|
while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do
|
|
set $b
|
|
base="$base /$1"
|
|
tail="$2"
|
|
done
|
|
|
|
# For sparc/sparc32, try sparc/sparc32 and then sparc.
|
|
mach=
|
|
tail=$machine${submachine:+/$submachine}
|
|
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
|
|
set $m
|
|
# Prepend the machine's FPU directory unless --without-fp.
|
|
if test "$with_fp" = yes; then
|
|
maybe_fpu=/fpu
|
|
else
|
|
maybe_fpu=/nofpu
|
|
fi
|
|
# For each machine term, try it with and then without /multiarch.
|
|
for try_fpu in $maybe_fpu ''; do
|
|
for try_multi in $multi_arch_d ''; do
|
|
mach="$mach /$1$try_fpu$try_multi"
|
|
done
|
|
done
|
|
tail="$2"
|
|
done
|
|
|
|
dnl We are done with glob and regexp uses of [ and ]; return to autoconf.
|
|
changequote([,])dnl
|
|
|
|
# Find what sysdep directories exist.
|
|
sysnames_add_ons=
|
|
sysnames=
|
|
for b in $base ''; do
|
|
for m0 in $mach ''; do
|
|
for v in /$vendor ''; do
|
|
test "$v" = / && continue
|
|
for o in /$ostry ''; do
|
|
test "$o" = / && continue
|
|
for m in $mach ''; do
|
|
for d in $add_ons_pfx ''; do
|
|
for a in $add_ons_sfx ''; do
|
|
try_suffix="$m0$b$v$o$m"
|
|
if test -n "$try_suffix"; then
|
|
try_srcdir="${srcdir}/"
|
|
case "$d" in
|
|
/*) try_srcdir= ;;
|
|
esac
|
|
try="${d}sysdeps$try_suffix$a"
|
|
test -n "$enable_debug_configure" &&
|
|
echo "$0 [DEBUG]: try $try" >&2
|
|
if test -d "$try_srcdir$try"; then
|
|
sysnames="$sysnames $try"
|
|
{ test -n "$o" || test -n "$b"; } && os_used=t
|
|
{ test -n "$m" || test -n "$m0"; } && machine_used=t
|
|
case x${m0:-$m} in
|
|
x*/$submachine) submachine_used=t ;;
|
|
esac
|
|
if test -n "$d"; then
|
|
case "$sysnames_add_ons" in
|
|
*" $d "*) ;;
|
|
*|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
|
|
esac
|
|
fi
|
|
fi
|
|
fi
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
done
|
|
|
|
# If the assembler supports gnu_indirect_function symbol type and the
|
|
# architecture supports multi-arch, we enable multi-arch by default.
|
|
case $sysnames_add_ons$sysnames in
|
|
*"$multi_arch_d"*)
|
|
;;
|
|
*)
|
|
test x"$multi_arch" = xdefault && multi_arch=no
|
|
;;
|
|
esac
|
|
if test x"$multi_arch" != xno; then
|
|
AC_DEFINE(USE_MULTIARCH)
|
|
fi
|
|
AC_SUBST(multi_arch)
|
|
|
|
if test -z "$os_used" && test "$os" != none; then
|
|
AC_MSG_ERROR(Operating system $os is not supported.)
|
|
fi
|
|
if test -z "$machine_used" && test "$machine" != none; then
|
|
AC_MSG_ERROR(The $machine is not supported.)
|
|
fi
|
|
if test -z "$submachine_used" && test -n "$submachine"; then
|
|
AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.)
|
|
fi
|
|
AC_SUBST(submachine)
|
|
|
|
# We have now validated the configuration.
|
|
|
|
# Expand the list of system names into a full list of directories
|
|
# from each element's parent name and Implies file (if present).
|
|
set $sysnames
|
|
names=
|
|
while test $# -gt 0; do
|
|
name=$1
|
|
shift
|
|
|
|
case " $names " in *" $name "*)
|
|
# Already in the list.
|
|
continue
|
|
esac
|
|
|
|
# Report each name as we discover it, so there is no long pause in output.
|
|
echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
|
|
|
|
name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'`
|
|
|
|
case $name in
|
|
/*) xsrcdir= ;;
|
|
*) xsrcdir=$srcdir/ ;;
|
|
esac
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2
|
|
|
|
for implies_file in Implies Implies-before Implies-after; do
|
|
implies_type=`echo $implies_file | sed s/-/_/`
|
|
eval ${implies_type}=
|
|
if test -f $xsrcdir$name/$implies_file; then
|
|
# Collect more names from the `Implies' file (removing comments).
|
|
implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`"
|
|
for x in $implied_candidate; do
|
|
found=no
|
|
if test -d $xsrcdir$name_base/$x; then
|
|
eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\""
|
|
found=yes
|
|
fi
|
|
for d in $add_ons_pfx ''; do
|
|
try="${d}sysdeps/$x"
|
|
case $d in
|
|
/*) try_srcdir= ;;
|
|
*) try_srcdir=$srcdir/ ;;
|
|
esac
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2
|
|
if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try;
|
|
then
|
|
eval "${implies_type}=\"\$${implies_type} \$try\""
|
|
found=yes
|
|
case "$sysnames_add_ons" in
|
|
*" $d "*) ;;
|
|
*|'') sysnames_add_ons="$sysnames_add_ons $d" ;;
|
|
esac
|
|
fi
|
|
done
|
|
if test $found = no; then
|
|
AC_MSG_WARN($name/$implies_file specifies nonexistent $x)
|
|
fi
|
|
done
|
|
fi
|
|
done
|
|
|
|
# Add NAME to the list of names.
|
|
names="$names $name"
|
|
|
|
# Find the parent of NAME, using the empty string if it has none.
|
|
changequote(,)dnl
|
|
parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`"
|
|
changequote([,])dnl
|
|
|
|
test -n "$enable_debug_configure" &&
|
|
echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \
|
|
Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2
|
|
|
|
# Add the names implied by NAME, and NAME's parent (if it has one), to
|
|
# the list of names to be processed (the argument list). We prepend the
|
|
# implied names to the list and append the parent. We want implied
|
|
# directories to come before further directories inferred from the
|
|
# configuration components; this ensures that for sysv4, unix/common
|
|
# (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*)
|
|
# after sysv4).
|
|
sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`"
|
|
test -n "$sysnames" && set $sysnames
|
|
done
|
|
|
|
# Add the default directories.
|
|
default_sysnames="sysdeps/generic"
|
|
sysnames="$names $default_sysnames"
|
|
AC_SUBST(sysnames)
|
|
# The other names were emitted during the scan.
|
|
AC_MSG_RESULT($default_sysnames)
|
|
|
|
# Collect the list of add-ons that supply partial sysdeps trees.
|
|
sysdeps_add_ons=
|
|
for add_on in $add_ons; do
|
|
case "$add_on" in
|
|
/*) xsrcdir= ;;
|
|
*) xsrcdir="$srcdir/" ;;
|
|
esac
|
|
|
|
test -d "$xsrcdir$add_on/sysdeps" || {
|
|
case "$configured_add_ons " in
|
|
*" $add_on "*) ;;
|
|
*|'')
|
|
AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree)
|
|
;;
|
|
esac
|
|
continue
|
|
}
|
|
|
|
sysdeps_add_ons="$sysdeps_add_ons $add_on"
|
|
case "$sysnames_add_ons" in
|
|
*" $add_on/ "*) ;;
|
|
*|'')
|
|
AC_MSG_WARN(add-on $add_on contributed no sysdeps directories)
|
|
continue ;;
|
|
esac
|
|
|
|
found=no
|
|
for d in $sysnames; do
|
|
case "$d" in
|
|
$add_on/sysdeps/*) ;;
|
|
*) continue ;;
|
|
esac
|
|
(cd "$xsrcdir$d" && for f in *[[!~]]; do
|
|
case "$f" in
|
|
sys|bits)
|
|
for ff in $f/*.h; do
|
|
test -d "$ff" || { test -e "$ff" && exit 88; }
|
|
done
|
|
;;
|
|
*)
|
|
test -d "$f" || { test -e "$f" && exit 88; }
|
|
;;
|
|
esac
|
|
done)
|
|
if test $? -eq 88; then
|
|
found=yes
|
|
break
|
|
fi
|
|
done
|
|
if test $found = no; then
|
|
AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories)
|
|
fi
|
|
done
|
|
AC_SUBST(sysdeps_add_ons)
|
|
|
|
|
|
### Locate tools.
|
|
|
|
AC_PROG_INSTALL
|
|
if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then
|
|
# The makefiles need to use a different form to find it in $srcdir.
|
|
INSTALL='\$(..)./scripts/install-sh -c'
|
|
fi
|
|
AC_PROG_LN_S
|
|
|
|
LIBC_PROG_BINUTILS
|
|
|
|
# Accept binutils 2.22 or newer.
|
|
AC_CHECK_PROG_VER(AS, $AS, --version,
|
|
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
|
|
[2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
|
|
AS=: critic_missing="$critic_missing as")
|
|
AC_CHECK_PROG_VER(LD, $LD, --version,
|
|
[GNU ld.* \([0-9][0-9]*\.[0-9.]*\)],
|
|
[2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*],
|
|
LD=: critic_missing="$critic_missing ld")
|
|
|
|
# These programs are version sensitive.
|
|
AC_CHECK_TOOL_PREFIX
|
|
AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version,
|
|
[GNU Make[^0-9]*\([0-9][0-9.]*\)],
|
|
[3.79* | 3.[89]* | [4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make")
|
|
|
|
AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version,
|
|
[GNU gettext.* \([0-9]*\.[0-9.]*\)],
|
|
[0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*],
|
|
MSGFMT=: aux_missing="$aux_missing msgfmt")
|
|
AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
|
|
[GNU texinfo.* \([0-9][0-9.]*\)],
|
|
[4.[7-9]*|4.[1-9][0-9]*|[5-9].*],
|
|
MAKEINFO=: aux_missing="$aux_missing makeinfo")
|
|
AC_CHECK_PROG_VER(SED, sed, --version,
|
|
[GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)],
|
|
[3.0[2-9]*|3.[1-9]*|[4-9]*],
|
|
SED=: aux_missing="$aux_missing sed")
|
|
AC_CHECK_PROG_VER(AWK, gawk, --version,
|
|
[GNU Awk[^0-9]*\([0-9][0-9.]*\)],
|
|
[3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk")
|
|
|
|
AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [
|
|
AC_TRY_COMPILE([], [
|
|
#if !defined __GNUC__ || __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7)
|
|
#error insufficient compiler
|
|
#endif],
|
|
[libc_cv_compiler_ok=yes],
|
|
[libc_cv_compiler_ok=no])])
|
|
AS_IF([test $libc_cv_compiler_ok != yes],
|
|
[critic_missing="$critic_missing compiler"])
|
|
|
|
AC_CHECK_TOOL(NM, nm, false)
|
|
|
|
if test "x$maintainer" = "xyes"; then
|
|
AC_CHECK_PROGS(AUTOCONF, autoconf, no)
|
|
case "x$AUTOCONF" in
|
|
xno|x|x:) AUTOCONF=no ;;
|
|
*)
|
|
AC_CACHE_CHECK(dnl
|
|
whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl
|
|
if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then
|
|
libc_cv_autoconf_works=yes
|
|
else
|
|
libc_cv_autoconf_works=no
|
|
fi])
|
|
test $libc_cv_autoconf_works = yes || AUTOCONF=no
|
|
;;
|
|
esac
|
|
if test "x$AUTOCONF" = xno; then
|
|
aux_missing="$aux_missing autoconf"
|
|
fi
|
|
else
|
|
AUTOCONF=no
|
|
fi
|
|
|
|
# Check for python3 if available, or else python.
|
|
AC_CHECK_PROGS(PYTHON_PROG, python3 python,no)
|
|
case "x$PYTHON_PROG" in
|
|
xno|x|x:) PYTHON_PROG=no ;;
|
|
*) ;;
|
|
esac
|
|
|
|
if test "x$PYTHON_PROG" = xno; then
|
|
aux_missing="$aux_missing python"
|
|
else
|
|
PYTHON="$PYTHON_PROG -B"
|
|
AC_SUBST(PYTHON)
|
|
fi
|
|
|
|
test -n "$critic_missing" && AC_MSG_ERROR([
|
|
*** These critical programs are missing or too old:$critic_missing
|
|
*** Check the INSTALL file for required versions.])
|
|
|
|
test -n "$aux_missing" && AC_MSG_WARN([
|
|
*** These auxiliary programs are missing or incompatible versions:$aux_missing
|
|
*** some features or tests will be disabled.
|
|
*** Check the INSTALL file for required versions.])
|
|
|
|
# if using special system headers, find out the compiler's sekrit
|
|
# header directory and add that to the list. NOTE: Only does the right
|
|
# thing on a system that doesn't need fixincludes. (Not presently a problem.)
|
|
if test -n "$sysheaders"; then
|
|
SYSINCLUDES=-nostdinc
|
|
for d in include include-fixed; do
|
|
i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" &&
|
|
SYSINCLUDES="$SYSINCLUDES -isystem $i"
|
|
done
|
|
SYSINCLUDES="$SYSINCLUDES \
|
|
-isystem `echo $sysheaders | sed 's/:/ -isystem /g'`"
|
|
if test -n "$CXX"; then
|
|
CXX_SYSINCLUDES=
|
|
for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \
|
|
| sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do
|
|
test "x$cxxheaders" != x &&
|
|
CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders"
|
|
done
|
|
fi
|
|
fi
|
|
AC_SUBST(SYSINCLUDES)
|
|
AC_SUBST(CXX_SYSINCLUDES)
|
|
|
|
# Obtain some C++ header file paths. This is used to make a local
|
|
# copy of those headers in Makerules.
|
|
if test -n "$CXX"; then
|
|
find_cxx_header () {
|
|
echo "#include <$1>" | $CXX -M -MP -x c++ - | sed -n "/$1:/{s/:\$//;p}"
|
|
}
|
|
CXX_CSTDLIB_HEADER="$(find_cxx_header cstdlib)"
|
|
CXX_CMATH_HEADER="$(find_cxx_header cmath)"
|
|
fi
|
|
AC_SUBST(CXX_CSTDLIB_HEADER)
|
|
AC_SUBST(CXX_CMATH_HEADER)
|
|
|
|
# Test if LD_LIBRARY_PATH contains the notation for the current directory
|
|
# since this would lead to problems installing/building glibc.
|
|
# LD_LIBRARY_PATH contains the current directory if one of the following
|
|
# is true:
|
|
# - one of the terminals (":" and ";") is the first or last sign
|
|
# - two terminals occur directly after each other
|
|
# - the path contains an element with a dot in it
|
|
AC_MSG_CHECKING(LD_LIBRARY_PATH variable)
|
|
changequote(,)dnl
|
|
case ${LD_LIBRARY_PATH} in
|
|
[:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
|
|
ld_library_path_setting="contains current directory"
|
|
;;
|
|
*)
|
|
ld_library_path_setting="ok"
|
|
;;
|
|
esac
|
|
changequote([,])dnl
|
|
AC_MSG_RESULT($ld_library_path_setting)
|
|
if test "$ld_library_path_setting" != "ok"; then
|
|
AC_MSG_ERROR([
|
|
*** LD_LIBRARY_PATH shouldn't contain the current directory when
|
|
*** building glibc. Please change the environment variable
|
|
*** and run configure again.])
|
|
fi
|
|
|
|
AC_PATH_PROG(BASH_SHELL, bash, no)
|
|
|
|
AC_PATH_PROG(PERL, perl, no)
|
|
if test "$PERL" != no &&
|
|
(eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then
|
|
PERL=no
|
|
fi
|
|
AC_PATH_PROG(INSTALL_INFO, install-info, no,
|
|
$PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin)
|
|
AC_CHECK_PROG_VER(BISON, bison, --version,
|
|
[bison (GNU Bison) \([0-9]*\.[0-9.]*\)],
|
|
[2.7*|[3-9].*|[1-9][0-9]*],
|
|
BISON=no)
|
|
|
|
AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl
|
|
cat > conftest.s <<EOF
|
|
.text
|
|
foo:
|
|
.set glibc_conftest_frobozz,foo
|
|
.globl glibc_conftest_frobozz
|
|
EOF
|
|
# The alpha-dec-osf1 assembler gives only a warning for `.set'
|
|
# (but it doesn't work), so we must do a linking check to be sure.
|
|
cat > conftest1.c <<\EOF
|
|
extern int glibc_conftest_frobozz;
|
|
void _start() { glibc_conftest_frobozz = 1; }
|
|
EOF
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
|
|
-nostartfiles -nostdlib \
|
|
-o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then
|
|
libc_cv_asm_set_directive=yes
|
|
else
|
|
libc_cv_asm_set_directive=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_asm_set_directive = yes; then
|
|
AC_DEFINE(HAVE_ASM_SET_DIRECTIVE)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(linker support for protected data symbol,
|
|
libc_cv_protected_data,
|
|
[cat > conftest.c <<EOF
|
|
int bar __attribute__ ((visibility ("protected"))) = 1;
|
|
EOF
|
|
libc_cv_protected_data=no
|
|
if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so); then
|
|
cat > conftest.c <<EOF
|
|
extern int bar;
|
|
int main (void) { return bar; }
|
|
EOF
|
|
if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so); then
|
|
libc_cv_protected_data=yes
|
|
fi
|
|
fi
|
|
rm -f conftest.*
|
|
])
|
|
AC_SUBST(libc_cv_protected_data)
|
|
|
|
AC_CACHE_CHECK(for broken __attribute__((alias())),
|
|
libc_cv_broken_alias_attribute,
|
|
[cat > conftest.c <<EOF
|
|
extern int foo (int x) __asm ("xyzzy");
|
|
int bar (int x) { return x; }
|
|
extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
|
|
extern int dfoo;
|
|
extern __typeof (dfoo) dfoo __asm ("abccb");
|
|
int dfoo = 1;
|
|
EOF
|
|
libc_cv_broken_alias_attribute=yes
|
|
if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
|
|
if grep 'xyzzy' conftest.s >/dev/null &&
|
|
grep 'abccb' conftest.s >/dev/null; then
|
|
libc_cv_broken_alias_attribute=no
|
|
fi
|
|
fi
|
|
rm -f conftest.c conftest.s
|
|
])
|
|
if test $libc_cv_broken_alias_attribute = yes; then
|
|
AC_MSG_ERROR(working alias attribute support required)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(whether to put _rtld_local into .sdata section,
|
|
libc_cv_have_sdata_section,
|
|
[echo "int i;" > conftest.c
|
|
libc_cv_have_sdata_section=no
|
|
if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \
|
|
| grep '\.sdata' >/dev/null; then
|
|
libc_cv_have_sdata_section=yes
|
|
fi
|
|
rm -f conftest.c conftest.so
|
|
])
|
|
if test $libc_cv_have_sdata_section = yes; then
|
|
AC_DEFINE(HAVE_SDATA_SECTION)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer,
|
|
libc_cv_ctors_header, [dnl
|
|
libc_cv_ctors_header=yes
|
|
LIBC_TRY_LINK_STATIC([
|
|
__attribute__ ((constructor)) void ctor (void) { asm (""); }
|
|
__attribute__ ((destructor)) void dtor (void) { asm (""); }
|
|
],
|
|
[dnl
|
|
AS_IF([$READELF -WS conftest$ac_exeext | $AWK '
|
|
{ gsub(/\@<:@ */, "@<:@") }
|
|
$2 == ".ctors" || $2 == ".dtors" {
|
|
size = strtonum("0x" $6)
|
|
align = strtonum("0x" $NF)
|
|
seen@<:@$2@:>@ = 1
|
|
stub@<:@$2@:>@ = size == align * 2
|
|
}
|
|
END {
|
|
ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@
|
|
dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@
|
|
exit ((ctors_ok && dtors_ok) ? 0 : 1)
|
|
}
|
|
'], [libc_cv_ctors_header=no])
|
|
], [dnl
|
|
AC_MSG_ERROR([missing __attribute__ ((constructor)) support??])
|
|
])
|
|
])
|
|
if test $libc_cv_ctors_header = no; then
|
|
AC_DEFINE(NO_CTORS_DTORS_SECTIONS)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for libunwind-support in compiler,
|
|
libc_cv_cc_with_libunwind, [
|
|
cat > conftest.c <<EOF
|
|
int main (void) { return 0; }
|
|
EOF
|
|
if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \
|
|
conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then
|
|
libc_cv_cc_with_libunwind=yes
|
|
else
|
|
libc_cv_cc_with_libunwind=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_cc_with_libunwind)
|
|
if test $libc_cv_cc_with_libunwind = yes; then
|
|
AC_DEFINE(HAVE_CC_WITH_LIBUNWIND)
|
|
fi
|
|
|
|
ASFLAGS_config=
|
|
AC_CACHE_CHECK(whether --noexecstack is desirable for .S files,
|
|
libc_cv_as_noexecstack, [dnl
|
|
cat > conftest.c <<EOF
|
|
void foo (void) { }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS
|
|
-S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \
|
|
&& grep .note.GNU-stack conftest.s >/dev/null \
|
|
&& AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack
|
|
-c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_as_noexecstack=yes
|
|
else
|
|
libc_cv_as_noexecstack=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_as_noexecstack = yes; then
|
|
ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack"
|
|
fi
|
|
AC_SUBST(ASFLAGS_config)
|
|
|
|
AC_CACHE_CHECK(for -z combreloc,
|
|
libc_cv_z_combreloc, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int bar (int);
|
|
extern int mumble;
|
|
int foo (void) { return bar (mumble); }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-nostdlib -nostartfiles
|
|
-Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
dnl The following test is a bit weak. We must use a tool which can test
|
|
dnl cross-platform since the gcc used can be a cross compiler. Without
|
|
dnl introducing new options this is not easily doable. Instead use a tool
|
|
dnl which always is cross-platform: readelf. To detect whether -z combreloc
|
|
dnl look for a section named .rel.dyn.
|
|
if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then
|
|
libc_cv_z_combreloc=yes
|
|
else
|
|
libc_cv_z_combreloc=no
|
|
fi
|
|
else
|
|
libc_cv_z_combreloc=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test "$libc_cv_z_combreloc" = yes; then
|
|
AC_DEFINE(HAVE_Z_COMBRELOC)
|
|
fi
|
|
AC_SUBST(libc_cv_z_combreloc)
|
|
|
|
LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
|
|
[libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
|
|
AC_SUBST(libc_cv_z_execstack)
|
|
|
|
AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
|
|
LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no])
|
|
])
|
|
|
|
AC_SUBST(libc_cv_fpie)
|
|
|
|
AC_CACHE_CHECK(for --hash-style option,
|
|
libc_cv_hashstyle, [dnl
|
|
cat > conftest.c <<EOF
|
|
int _start (void) { return 42; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_hashstyle=yes
|
|
else
|
|
libc_cv_hashstyle=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_hashstyle)
|
|
|
|
# The linker's default -shared behavior is good enough if it
|
|
# does these things that our custom linker scripts ensure that
|
|
# all allocated NOTE sections come first.
|
|
if test "$use_default_link" = default; then
|
|
AC_CACHE_CHECK([for sufficient default -shared layout],
|
|
libc_cv_use_default_link, [dnl
|
|
libc_cv_use_default_link=no
|
|
cat > conftest.s <<\EOF
|
|
.section .note.a,"a",%note
|
|
.balign 4
|
|
.long 4,4,9
|
|
.string "GNU"
|
|
.string "foo"
|
|
.section .note.b,"a",%note
|
|
.balign 4
|
|
.long 4,4,9
|
|
.string "GNU"
|
|
.string "bar"
|
|
EOF
|
|
if AC_TRY_COMMAND([dnl
|
|
${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) &&
|
|
ac_try=`$READELF -S conftest.so | sed -n \
|
|
['${x;p;}
|
|
s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/
|
|
t a
|
|
b
|
|
: a
|
|
H']`
|
|
then
|
|
libc_seen_a=no libc_seen_b=no
|
|
set -- $ac_try
|
|
while test $# -ge 2 -a "$1" = NOTE; do
|
|
case "$2" in
|
|
.note.a) libc_seen_a=yes ;;
|
|
.note.b) libc_seen_b=yes ;;
|
|
esac
|
|
shift 2
|
|
done
|
|
case "$libc_seen_a$libc_seen_b" in
|
|
yesyes)
|
|
libc_cv_use_default_link=yes
|
|
;;
|
|
*)
|
|
echo >&AS_MESSAGE_LOG_FD "\
|
|
$libc_seen_a$libc_seen_b from:
|
|
$ac_try"
|
|
;;
|
|
esac
|
|
fi
|
|
rm -f conftest*])
|
|
use_default_link=$libc_cv_use_default_link
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for GLOB_DAT reloc,
|
|
libc_cv_has_glob_dat, [dnl
|
|
cat > conftest.c <<EOF
|
|
extern int mumble;
|
|
int foo (void) { return mumble; }
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
|
|
-fPIC -shared -o conftest.so conftest.c
|
|
-nostdlib -nostartfiles
|
|
1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
dnl look for GLOB_DAT relocation.
|
|
if $READELF -rW conftest.so | grep '_GLOB_DAT' > /dev/null; then
|
|
libc_cv_has_glob_dat=yes
|
|
else
|
|
libc_cv_has_glob_dat=no
|
|
fi
|
|
else
|
|
libc_cv_has_glob_dat=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_has_glob_dat)
|
|
|
|
AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl
|
|
if libc_cv_output_format=`
|
|
${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD`
|
|
then
|
|
:
|
|
else
|
|
libc_cv_output_format=
|
|
fi
|
|
test -n "$libc_cv_output_format" || libc_cv_output_format=unknown])
|
|
AC_SUBST(libc_cv_output_format)
|
|
|
|
AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl
|
|
cat > conftest.c <<EOF
|
|
int foo;
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors
|
|
conftest.c 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_fno_toplevel_reorder=yes
|
|
else
|
|
libc_cv_fno_toplevel_reorder=no
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_fno_toplevel_reorder = yes; then
|
|
fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors"
|
|
else
|
|
fno_unit_at_a_time=-fno-unit-at-a-time
|
|
fi
|
|
AC_SUBST(fno_unit_at_a_time)
|
|
|
|
AC_CACHE_CHECK([for -mtls-dialect=gnu2], libc_cv_mtls_dialect_gnu2,
|
|
[dnl
|
|
cat > conftest.c <<EOF
|
|
__thread int i;
|
|
void foo (void)
|
|
{
|
|
i = 10;
|
|
}
|
|
EOF
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fPIC -mtls-dialect=gnu2
|
|
conftest.c 1>&AS_MESSAGE_LOG_FD])
|
|
then
|
|
libc_cv_mtls_dialect_gnu2=yes
|
|
else
|
|
libc_cv_mtls_dialect_gnu2=no
|
|
fi
|
|
rm -f conftest*])
|
|
AC_SUBST(libc_cv_mtls_dialect_gnu2)
|
|
LIBC_CONFIG_VAR([have-mtls-dialect-gnu2], [$libc_cv_mtls_dialect_gnu2])
|
|
|
|
AC_CACHE_CHECK(whether cc puts quotes around section names,
|
|
libc_cv_have_section_quotes,
|
|
[cat > conftest.c <<EOF
|
|
static const int foo
|
|
__attribute__ ((section ("bar"))) = 1;
|
|
EOF
|
|
if ${CC-cc} -S conftest.c -o conftest.s; then
|
|
if grep '\.section.*"bar"' conftest.s >/dev/null; then
|
|
libc_cv_have_section_quotes=yes
|
|
else
|
|
libc_cv_have_section_quotes=no
|
|
fi
|
|
else
|
|
libc_cv_have_section_quotes=unknown
|
|
fi
|
|
rm -f conftest.{c,s}
|
|
])
|
|
if test $libc_cv_have_section_quotes = yes; then
|
|
AC_DEFINE(HAVE_SECTION_QUOTES)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
|
|
cat > conftest.c <<\EOF
|
|
void zero (void *x)
|
|
{
|
|
__builtin_memset (x, 0, 1000);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]);
|
|
then
|
|
libc_cv_gcc_builtin_memset=no
|
|
else
|
|
libc_cv_gcc_builtin_memset=yes
|
|
fi
|
|
rm -f conftest* ])
|
|
if test "$libc_cv_gcc_builtin_memset" = yes ; then
|
|
AC_DEFINE(HAVE_BUILTIN_MEMSET)
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl
|
|
cat > conftest.c <<\EOF
|
|
extern char *strstr (const char *, const char *) __asm ("my_strstr");
|
|
char *foo (const char *a, const char *b)
|
|
{
|
|
return __builtin_strstr (a, b);
|
|
}
|
|
EOF
|
|
dnl
|
|
if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]);
|
|
then
|
|
libc_cv_gcc_builtin_redirection=yes
|
|
else
|
|
libc_cv_gcc_builtin_redirection=no
|
|
fi
|
|
rm -f conftest* ])
|
|
if test "$libc_cv_gcc_builtin_redirection" = no; then
|
|
AC_MSG_ERROR([support for the symbol redirection needed])
|
|
fi
|
|
|
|
dnl Determine how to disable generation of FMA instructions.
|
|
AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions],
|
|
libc_cv_cc_nofma, [dnl
|
|
libc_cv_cc_nofma=
|
|
for opt in -ffp-contract=off -mno-fused-madd; do
|
|
LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break])
|
|
done])
|
|
AC_SUBST(libc_cv_cc_nofma)
|
|
|
|
if test -n "$submachine"; then
|
|
AC_CACHE_CHECK([for compiler option for CPU variant],
|
|
libc_cv_cc_submachine, [dnl
|
|
libc_cv_cc_submachine=no
|
|
for opt in "-march=$submachine" "-mcpu=$submachine"; do
|
|
LIBC_TRY_CC_OPTION([$opt], [
|
|
libc_cv_cc_submachine="$opt"
|
|
break], [])
|
|
done])
|
|
if test "x$libc_cv_cc_submachine" = xno; then
|
|
AC_MSG_ERROR([${CC-cc} does not support $submachine])
|
|
fi
|
|
fi
|
|
AC_SUBST(libc_cv_cc_submachine)
|
|
|
|
AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \
|
|
__attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl
|
|
cat > conftest.c <<EOF
|
|
void
|
|
__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
|
|
foo (void) {}
|
|
EOF
|
|
libc_cv_cc_loop_to_function=no
|
|
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c])
|
|
then
|
|
libc_cv_cc_loop_to_function=yes
|
|
fi
|
|
rm -f conftest*])
|
|
if test $libc_cv_cc_loop_to_function = yes; then
|
|
AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL)
|
|
fi
|
|
AC_SUBST(libc_cv_cc_loop_to_function)
|
|
|
|
dnl Check whether we have the gd library available.
|
|
AC_MSG_CHECKING(for libgd)
|
|
if test "$with_gd" != "no"; then
|
|
old_CFLAGS="$CFLAGS"
|
|
CFLAGS="$CFLAGS $libgd_include"
|
|
old_LDFLAGS="$LDFLAGS"
|
|
LDFLAGS="$LDFLAGS $libgd_ldflags"
|
|
old_LIBS="$LIBS"
|
|
LIBS="$LIBS -lgd -lpng -lz -lm"
|
|
AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no)
|
|
CFLAGS="$old_CFLAGS"
|
|
LDFLAGS="$old_LDFLAGS"
|
|
LIBS="$old_LIBS"
|
|
else
|
|
LIBGD=no
|
|
fi
|
|
AC_MSG_RESULT($LIBGD)
|
|
AC_SUBST(LIBGD)
|
|
|
|
# SELinux detection
|
|
if test x$with_selinux = xno ; then
|
|
have_selinux=no;
|
|
else
|
|
# See if we have the SELinux library
|
|
AC_CHECK_LIB(selinux, is_selinux_enabled,
|
|
have_selinux=yes, have_selinux=no)
|
|
if test x$with_selinux = xyes ; then
|
|
if test x$have_selinux = xno ; then
|
|
AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found])
|
|
fi
|
|
fi
|
|
fi
|
|
# Check if we're building with SELinux support.
|
|
if test "x$have_selinux" = xyes; then
|
|
AC_DEFINE(HAVE_SELINUX, 1, [SELinux support])
|
|
|
|
# See if we have the libaudit library
|
|
AC_CHECK_LIB(audit, audit_log_user_avc_message,
|
|
have_libaudit=yes, have_libaudit=no)
|
|
if test "x$have_libaudit" = xyes; then
|
|
AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support])
|
|
fi
|
|
AC_SUBST(have_libaudit)
|
|
|
|
# See if we have the libcap library
|
|
AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no)
|
|
if test "x$have_libcap" = xyes; then
|
|
AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support])
|
|
fi
|
|
AC_SUBST(have_libcap)
|
|
fi
|
|
AC_SUBST(have_selinux)
|
|
|
|
CPPUNDEFS=
|
|
dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE.
|
|
dnl Since we are building the implementations of the fortified functions here,
|
|
dnl having the macro defined interacts very badly.
|
|
AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source,
|
|
[AC_TRY_COMPILE([], [
|
|
#ifdef _FORTIFY_SOURCE
|
|
# error bogon
|
|
#endif],
|
|
[libc_cv_predef_fortify_source=no],
|
|
[libc_cv_predef_fortify_source=yes])])
|
|
if test $libc_cv_predef_fortify_source = yes; then
|
|
CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE"
|
|
fi
|
|
AC_SUBST(CPPUNDEFS)
|
|
|
|
dnl Check for silly hacked compilers inserting -fstack-protector.
|
|
dnl This breaks badly for the early startup code we compile, since
|
|
dnl the compiled code can refer to a magic machine-dependent location
|
|
dnl for the canary value before we have sufficient setup for that to
|
|
dnl work. It's also questionable to build all of libc with this flag
|
|
dnl even when you're doing that for most applications you build, since
|
|
dnl libc's code is so heavily-used and performance-sensitive. If we
|
|
dnl ever really want to make that work, it should be enabled explicitly
|
|
dnl in the libc build, not inherited from implicit compiler settings.
|
|
AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector],
|
|
libc_cv_predef_stack_protector, [
|
|
AC_TRY_COMPILE([extern void foobar (char *);],
|
|
[char large_array[2048]; foobar (large_array);], [
|
|
libc_undefs=`$NM -u conftest.o |
|
|
LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
|
|
2>&AS_MESSAGE_LOG_FD` || {
|
|
AC_MSG_ERROR([confusing output from $NM -u])
|
|
}
|
|
echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
|
|
# On some architectures, there are architecture-specific undefined
|
|
# symbols (resolved by the linker), so filter out unknown symbols.
|
|
# This will fail to produce the correct result if the compiler
|
|
# defaults to -fstack-protector but this produces an undefined symbol
|
|
# other than __stack_chk_fail or __stack_chk_fail_local. However,
|
|
# compilers like that have not been encountered in practice.
|
|
libc_undefs=`echo "$libc_undefs" | \
|
|
egrep '^(foobar|__stack_chk_fail|__stack_chk_fail_local)$'`
|
|
case "$libc_undefs" in
|
|
foobar) libc_cv_predef_stack_protector=no ;;
|
|
'__stack_chk_fail
|
|
foobar'|'__stack_chk_fail_local
|
|
foobar') libc_cv_predef_stack_protector=yes ;;
|
|
*) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;;
|
|
esac],
|
|
[AC_MSG_ERROR([test compilation failed])])
|
|
])
|
|
libc_extra_cflags=
|
|
if test $libc_cv_predef_stack_protector = yes; then
|
|
libc_extra_cflags="$libc_extra_cflags -fno-stack-protector"
|
|
fi
|
|
libc_extra_cppflags=
|
|
|
|
# Some linkers on some architectures support __ehdr_start but with
|
|
# bugs. Make sure usage of it does not create relocations in the
|
|
# output (as the linker should resolve them all for us).
|
|
AC_CACHE_CHECK([whether the linker provides working __ehdr_start],
|
|
libc_cv_ehdr_start, [
|
|
old_CFLAGS="$CFLAGS"
|
|
old_LDFLAGS="$LDFLAGS"
|
|
old_LIBS="$LIBS"
|
|
CFLAGS="$CFLAGS -fPIC"
|
|
LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared"
|
|
LIBS=
|
|
AC_LINK_IFELSE([AC_LANG_SOURCE([
|
|
typedef struct {
|
|
char foo;
|
|
long val;
|
|
} Ehdr;
|
|
extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden")));
|
|
long ehdr (void) { return __ehdr_start.val; }
|
|
])],
|
|
[if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then
|
|
libc_cv_ehdr_start=broken
|
|
else
|
|
libc_cv_ehdr_start=yes
|
|
fi], [libc_cv_ehdr_start=no])
|
|
CFLAGS="$old_CFLAGS"
|
|
LDFLAGS="$old_LDFLAGS"
|
|
LIBS="$old_LIBS"
|
|
])
|
|
if test "$libc_cv_ehdr_start" = yes; then
|
|
AC_DEFINE([HAVE_EHDR_START])
|
|
elif test "$libc_cv_ehdr_start" = broken; then
|
|
AC_MSG_WARN([linker is broken -- you should upgrade])
|
|
fi
|
|
|
|
AC_CACHE_CHECK(for __builtin_trap with no external dependencies,
|
|
libc_cv_builtin_trap, [dnl
|
|
libc_cv_builtin_trap=no
|
|
AC_TRY_COMPILE([], [__builtin_trap ()], [
|
|
libc_undefs=`$NM -u conftest.o |
|
|
LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \
|
|
2>&AS_MESSAGE_LOG_FD` || {
|
|
AC_MSG_ERROR([confusing output from $NM -u])
|
|
}
|
|
echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'"
|
|
if test -z "$libc_undefs"; then
|
|
libc_cv_builtin_trap=yes
|
|
fi])])
|
|
if test $libc_cv_builtin_trap = yes; then
|
|
AC_DEFINE([HAVE_BUILTIN_TRAP])
|
|
fi
|
|
|
|
dnl C++ feature tests.
|
|
AC_LANG_PUSH([C++])
|
|
|
|
AC_CACHE_CHECK([whether the C++ compiler supports thread_local],
|
|
libc_cv_cxx_thread_local, [
|
|
old_CXXFLAGS="$CXXFLAGS"
|
|
CXXFLAGS="$CXXFLAGS -std=gnu++11"
|
|
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
|
|
#include <thread>
|
|
|
|
// Compiler support.
|
|
struct S
|
|
{
|
|
S ();
|
|
~S ();
|
|
};
|
|
thread_local S s;
|
|
S * get () { return &s; }
|
|
|
|
// libstdc++ support.
|
|
#ifndef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL
|
|
#error __cxa_thread_atexit_impl not supported
|
|
#endif
|
|
])],
|
|
[libc_cv_cxx_thread_local=yes],
|
|
[libc_cv_cxx_thread_local=no])
|
|
CXXFLAGS="$old_CXXFLAGS"
|
|
])
|
|
AC_SUBST(libc_cv_cxx_thread_local)
|
|
|
|
AC_LANG_POP([C++])
|
|
dnl End of C++ feature tests.
|
|
|
|
### End of automated tests.
|
|
### Now run sysdeps configure fragments.
|
|
|
|
# They also can set these variables.
|
|
use_ldconfig=no
|
|
ldd_rewrite_script=no
|
|
libc_cv_sysconfdir=$sysconfdir
|
|
libc_cv_localstatedir=$localstatedir
|
|
libc_cv_gcc_unwind_find_fde=no
|
|
libc_cv_idn=no
|
|
|
|
# Iterate over all the sysdep directories we will use, running their
|
|
# configure fragments.
|
|
for dir in $sysnames; do
|
|
case $dir in
|
|
/*) dest=$dir ;;
|
|
*) dest=$srcdir/$dir ;;
|
|
esac
|
|
if test -r $dest/configure; then
|
|
AC_MSG_RESULT(running configure fragment for $dir)
|
|
. $dest/configure
|
|
fi
|
|
done
|
|
|
|
if test x"$build_mathvec" = xnotset; then
|
|
build_mathvec=no
|
|
fi
|
|
LIBC_CONFIG_VAR([build-mathvec], [$build_mathvec])
|
|
|
|
AC_SUBST(libc_extra_cflags)
|
|
AC_SUBST(libc_extra_cppflags)
|
|
|
|
if test x$libc_cv_gcc_unwind_find_fde = xyes; then
|
|
AC_DEFINE(EXPORT_UNWIND_FIND_FDE)
|
|
fi
|
|
AC_SUBST(libc_cv_gcc_unwind_find_fde)
|
|
|
|
# A sysdeps configure fragment can reset this if IFUNC is not actually
|
|
# usable even though the assembler knows how to generate the symbol type.
|
|
if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
|
|
AC_DEFINE(HAVE_IFUNC)
|
|
fi
|
|
|
|
if test x"$libc_cv_gcc_indirect_function" = xyes; then
|
|
AC_DEFINE(HAVE_GCC_IFUNC)
|
|
fi
|
|
|
|
# This is far from the AC_ARG_ENABLE that sets it so that a sysdeps
|
|
# configure fragment can override the value to prevent this AC_DEFINE.
|
|
AC_SUBST(use_nscd)
|
|
if test "x$use_nscd" != xno; then
|
|
AC_DEFINE([USE_NSCD])
|
|
fi
|
|
if test "x$build_nscd" = xdefault; then
|
|
build_nscd=$use_nscd
|
|
fi
|
|
|
|
AC_SUBST(libc_cv_slibdir)
|
|
AC_SUBST(libc_cv_rtlddir)
|
|
AC_SUBST(libc_cv_complocaledir)
|
|
AC_SUBST(libc_cv_sysconfdir)
|
|
AC_SUBST(libc_cv_localstatedir)
|
|
AC_SUBST(libc_cv_rootsbindir)
|
|
|
|
if test x$use_ldconfig = xyes; then
|
|
AC_DEFINE(USE_LDCONFIG)
|
|
fi
|
|
AC_SUBST(use_ldconfig)
|
|
AC_SUBST(ldd_rewrite_script)
|
|
|
|
AC_SUBST(static)
|
|
AC_SUBST(shared)
|
|
|
|
AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default,
|
|
[libc_cv_pic_default=yes
|
|
cat > conftest.c <<EOF
|
|
#if defined __PIC__ || defined __pic__ || defined PIC || defined pic
|
|
# error PIC is default.
|
|
#endif
|
|
EOF
|
|
if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
|
|
libc_cv_pic_default=no
|
|
fi
|
|
rm -f conftest.*])
|
|
AC_SUBST(libc_cv_pic_default)
|
|
|
|
AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default,
|
|
[libc_cv_pie_default=yes
|
|
cat > conftest.c <<EOF
|
|
#if defined __PIE__ || defined __pie__ || defined PIE || defined pie
|
|
# error PIE is default.
|
|
#endif
|
|
EOF
|
|
if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then
|
|
libc_cv_pie_default=no
|
|
fi
|
|
rm -f conftest.*])
|
|
AC_SUBST(libc_cv_pie_default)
|
|
|
|
AC_SUBST(profile)
|
|
AC_SUBST(static_nss)
|
|
|
|
AC_SUBST(DEFINES)
|
|
|
|
dnl See sysdeps/mach/configure.ac for this variable.
|
|
AC_SUBST(mach_interface_list)
|
|
|
|
VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h`
|
|
AC_SUBST(VERSION)
|
|
AC_SUBST(RELEASE)
|
|
|
|
AC_CONFIG_FILES([config.make Makefile])
|
|
AC_CONFIG_COMMANDS([default],[[
|
|
case $CONFIG_FILES in *config.make*)
|
|
echo "$config_vars" >> config.make;;
|
|
esac
|
|
test -d bits || mkdir bits]],[[config_vars='$config_vars']])
|
|
AC_OUTPUT
|