dnl Process this file with autoconf to produce a configure script. AC_REVISION([$CVSid$]) AC_PREREQ(2.53)dnl dnl Minimum Autoconf version required. AC_INIT([GNU C Library], [(see version.h)], [glibc]) AC_CONFIG_SRCDIR([include/features.h]) AC_CONFIG_HEADERS([config.h]) AC_CONFIG_AUX_DIR([scripts]) if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then AC_MSG_ERROR([you must configure in a separate build directory]) fi # This will get text that should go into config.make. config_vars= # Check for a --with-gmp argument and set gmp-srcdir in config.make. AC_ARG_WITH([gmp], AC_HELP_STRING([--with-gmp=DIRECTORY], [find GMP source code in DIRECTORY (not needed)]), [ case "$with_gmp" in yes) AC_MSG_ERROR([--with-gmp requires an argument; use --with-gmp=DIRECTORY]) ;; ''|no) ;; *) config_vars="$config_vars gmp-srcdir = $withval" ;; esac ]) # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. AC_ARG_WITH([gd], AC_HELP_STRING([--with-gd=DIR], [find libgd include dir and library with prefix DIR]), [dnl case "$with_gd" in yes|''|no) ;; *) libgd_include="-I$withval/include" libgd_ldflags="-L$withval/lib" ;; esac ]) AC_ARG_WITH([gd-include], AC_HELP_STRING([--with-gd-include=DIR], [find libgd include files in DIR]), [dnl case "$with_gd_include" in ''|no) ;; *) libgd_include="-I$withval" ;; esac ]) AC_ARG_WITH([gd-lib], AC_HELP_STRING([--with-gd-lib=DIR], [find libgd library files in DIR]), [dnl case "$with_gd_lib" in ''|no) ;; *) libgd_ldflags="-L$withval" ;; esac ]) if test -n "$libgd_include"; then config_vars="$config_vars CFLAGS-memusagestat.c = $libgd_include" fi if test -n "$libgd_ldflags"; then config_vars="$config_vars libgd-LDFLAGS = $libgd_ldflags" fi dnl Arguments to specify presence of other packages/features. 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AC_ARG_ENABLE([add-ons], AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@], [configure and build add-ons in DIR1,DIR2,... search for add-ons if no parameter given]), [case "$enableval" in yes) add_ons=`cd $srcdir && echo */configure | sed -e 's!/configure!!g'` add_ons_automatic=yes test "$add_ons" = "*" && add_ons= ;; *) add_ons=`echo "$enableval" | sed 's/,/ /g'` add_ons_automatic=no ;; esac], [add_ons= add_ons_automatic=no]) dnl Let the user avoid using TLS. Don't know why but... AC_ARG_WITH([tls], AC_HELP_STRING([--with-tls], [enable support for TLS]), [usetls=$withval], [usetls=yes]) AC_ARG_WITH([__thread], AC_HELP_STRING([--without-__thread], [do not use TLS features even when supporting them]), [use__thread=$withval], [use__thread=yes]) AC_ARG_ENABLE([hidden-plt], AC_HELP_STRING([--disable-hidden-plt], [do not hide internal function calls to avoid PLT]), [hidden=$enableval], [hidden=yes]) if test "x$hidden" = xno; then AC_DEFINE(NO_HIDDEN) fi AC_ARG_ENABLE([bind-now], AC_HELP_STRING([--enable-bind-now], [disable lazy relocations in DSOs]), [bindnow=$enableval], [bindnow=no]) AC_SUBST(bindnow) dnl On some platforms we cannot use dynamic loading. We must provide dnl static NSS modules. AC_ARG_ENABLE([static-nss], AC_HELP_STRING([--enable-static-nss], [build static NSS modules @<:@default=no@:>@]), [static_nss=$enableval], [static_nss=no]) dnl Enable static NSS also if we build no shared objects. if test x"$static_nss" = xyes || test x"$shared" = xno; then static_nss=yes AC_DEFINE(DO_STATIC_NSS) fi AC_ARG_ENABLE([force-install], AC_HELP_STRING([--disable-force-install], [don't force installation of files from this package, even if they are older than the installed files]), [force_install=$enableval], [force_install=yes]) AC_SUBST(force_install) dnl On some platforms we allow dropping compatibility with all kernel dnl versions. AC_ARG_ENABLE([kernel], AC_HELP_STRING([--enable-kernel=VERSION], [compile for compatibility with kernel not older than VERSION]), [minimum_kernel=$enableval], []) dnl Prevent unreasonable values. if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then # Better nothing than this. minimum_kernel="" else if test "$minimum_kernel" = current; then minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= fi fi dnl For the development we sometimes want gcc to issue even more warnings. dnl This is not the default since many of the extra warnings are not dnl appropriate. AC_ARG_ENABLE([all-warnings], AC_HELP_STRING([--enable-all-warnings], [enable all useful warnings gcc can issue]), [all_warnings=$enableval], []) AC_SUBST(all_warnings) AC_CANONICAL_HOST # The way shlib-versions is used to generate soversions.mk uses a # fairly simplistic model for name recognition that can't distinguish # i486-pc-linux-gnu fully from i486-pc-gnu. 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So, if you have interest to see glibc on" echo "*** this platform visit" echo "*** http://www.gnu.org/software/libc/porting.html" echo "*** and join the group of porters" exit 1 ;; esac fi dnl We need to use [ and ] for other purposes for a while now. changequote(,)dnl # Expand the configuration machine name into a subdirectory by architecture # type and particular chip. 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then AC_DEFINE(USE_REGPARMS) fi # Compute the list of sysdep directories for this configuration. # This can take a while to compute. sysdep_dir=$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'`" case "$os" in gnu*) base_os=mach/hurd ;; netbsd* | 386bsd* | freebsd* | bsdi*) base_os=unix/bsd/bsd4.4 ;; osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*) base_os=unix/bsd ;; sysv* | isc* | esix* | sco* | minix* | irix4* | linux*) base_os=unix/sysv ;; irix6*) base_os=unix/sysv/irix6/$os ;; solaris[2-9]*) base_os=unix/sysv/sysv4 ;; hpux*) base_os=unix/sysv/hpux/$os ;; aix4.3*) base_os=unix/sysv/aix/aix4.3 ;; none) base_os=standalone ;; *) base_os='' ;; esac # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. tail=$os ostry=$os while o=`echo $tail | sed 's/\.[^.]*$//'`; 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AC_PATH_PROG(PWD_P, pwd, no) if test "$PWD_P" = no; then AC_MSG_ERROR(*** A pwd binary could not be found.) fi # These programs are version sensitive. AC_CHECK_TOOL_PREFIX AC_CHECK_PROG_VER(CC, ${ac_tool_prefix}gcc ${ac_tool_prefix}cc, -v, [version \([egcygnustpi-]*[0-9.]*\)], [3.[2-9]* | 4.[0-9]* ], critic_missing="$critic_missing gcc") AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, [GNU Make[^0-9]*\([0-9][0-9.]*\)], [3.79* | 3.[89]*], 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.*], MAKEINFO=: aux_missing="$aux_missing makeinfo") AC_CHECK_PROG_VER(SED, sed, --version, [GNU sed version \([0-9]*\.[0-9.]*\)], [3.0[2-9]*|3.[1-9]*|[4-9]*], SED=: aux_missing="$aux_missing sed") AC_CHECK_PROGS(AUTOCONF, autoconf, no) case "x$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.in > /dev/null 2>&1); then libc_cv_autoconf_works=yes else libc_cv_autoconf_works=no fi]) test $libc_cv_autoconf_works = yes || AUTOCONF=no ;; esac if test "x$with_cvs" = xyes && test "x$AUTOCONF" = xno; then # If --without-cvs they probably won't change configure.in, so no complaints. aux_missing="$aux_missing autoconf" 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 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 "$sysheaders"; then ccheaders=`$CC -print-file-name=include` SYSINCLUDES="-nostdinc -isystem $ccheaders \ -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" fi AC_SUBST(SYSINCLUDES) # check if ranlib is necessary AC_CACHE_CHECK(whether ranlib is necessary, libc_cv_ranlib_necessary, [dnl cat > conftest.c <&1 | grep -q 'unrecognized option.*static-libgcc'; then libc_cv_gcc_static_libgcc= else libc_cv_gcc_static_libgcc=-static-libgcc fi]) AC_SUBST(libc_cv_gcc_static_libgcc) AC_PATH_PROG(BASH, bash, no) if test "$BASH" != no && $BASH -c 'test "$BASH_VERSINFO" \ && test "$BASH_VERSINFO" -ge 2 >&/dev/null'; then libc_cv_have_bash2=yes else libc_cv_have_bash2=no fi AC_SUBST(libc_cv_have_bash2) dnl We need a ksh compatible shell for tzselect. if test "$BASH" = no; then AC_PATH_PROG(KSH, ksh, no) if test "$KSH" = no; then libc_cv_have_ksh=no else libc_cv_have_ksh=yes fi else KSH="$BASH" AC_SUBST(KSH) libc_cv_have_ksh=yes fi AC_SUBST(libc_cv_have_ksh) AC_PROG_AWK 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_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin) AC_CACHE_CHECK(for signed size_t type, libc_cv_signed_size_t, [dnl echo '#include FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c if eval "$ac_cpp conftest.c 2>/dev/null" \ | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then libc_cv_signed_size_t=no else libc_cv_signed_size_t=yes fi rm -f conftest*]) if test $libc_cv_signed_size_t = yes; then dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings. cat >> confdefs.h <<\EOF #undef __SIZE_TYPE__ #define __SIZE_TYPE__ unsigned EOF fi AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl AC_TRY_COMPILE(dnl [#define __need_size_t #define __need_wchar_t #include #define __need_NULL #include ], [size_t size; wchar_t wchar; #ifdef offsetof #error stddef.h ignored __need_* #endif if (&size == NULL || &wchar == NULL) abort ();], libc_cv_friendly_stddef=yes, libc_cv_friendly_stddef=no)]) if test $libc_cv_friendly_stddef = yes; then config_vars="$config_vars override stddef.h = # The installed seems to be libc-friendly." fi AC_CACHE_CHECK(whether we need to use -P to assemble .S files, libc_cv_need_minus_P, [dnl cat > conftest.S <&AS_MESSAGE_LOG_FD); then libc_cv_need_minus_P=no else libc_cv_need_minus_P=yes fi rm -f conftest*]) if test $libc_cv_need_minus_P = yes; then config_vars="$config_vars asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives." fi AC_MSG_CHECKING(whether .text pseudo-op must be used) AC_CACHE_VAL(libc_cv_dot_text, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_dot_text=.text fi rm -f conftest*]) if test -z "$libc_cv_dot_text"; then AC_MSG_RESULT(no) else AC_MSG_RESULT(yes) fi AC_CACHE_CHECK(for assembler global-symbol directive, libc_cv_asm_global_directive, [dnl libc_cv_asm_global_directive=UNKNOWN for ac_globl in .globl .global .EXPORT; do cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_global_directive=${ac_globl} fi rm -f conftest* test $libc_cv_asm_global_directive != UNKNOWN && break done]) if test $libc_cv_asm_global_directive = UNKNOWN; then AC_MSG_ERROR(cannot determine asm global directive) else AC_DEFINE_UNQUOTED(ASM_GLOBAL_DIRECTIVE, ${libc_cv_asm_global_directive}) fi AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl cat > conftest.s < 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 $libc_cv_asm_set_directive = yes; then AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) fi AC_CACHE_CHECK(for assembler .type directive prefix, libc_cv_asm_type_prefix, [dnl libc_cv_asm_type_prefix=no for ac_try_prefix in '@' '%' '#'; do cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_type_prefix=${ac_try_prefix} fi rm -f conftest* test "x$libc_cv_asm_type_prefix" != xno && break done]) if test "x$libc_cv_asm_type_prefix" != xno; then AC_DEFINE_UNQUOTED(ASM_TYPE_DIRECTIVE_PREFIX, ${libc_cv_asm_type_prefix}) fi AC_CACHE_CHECK(for .symver assembler directive, libc_cv_asm_symver_directive, [cat > conftest.s <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then libc_cv_asm_symver_directive=yes else libc_cv_asm_symver_directive=no fi rm -f conftest*]) AC_CACHE_CHECK(for ld --version-script, libc_cv_ld_version_script_option, [dnl if test $libc_cv_asm_symver_directive = yes; then cat > conftest.s < conftest.map <&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then if AC_TRY_COMMAND([${CC-cc} $CFLAGS $LDFLAGS -shared -o conftest.so conftest.o -nostartfiles -nostdlib -Wl,--version-script,conftest.map 1>&AS_MESSAGE_LOG_FD]); then libc_cv_ld_version_script_option=yes else libc_cv_ld_version_script_option=no fi else libc_cv_ld_version_script_option=no fi else libc_cv_ld_version_script_option=no fi rm -f conftest*]) if test $shared != no && test $libc_cv_asm_symver_directive = yes && test $libc_cv_ld_version_script_option = yes && test $enable_versioning = yes; then VERSIONING=yes AC_DEFINE(DO_VERSIONING) else VERSIONING=no fi AC_SUBST(VERSIONING) if test $elf = yes && test $shared != no && test $VERSIONING = no; then echo "\ *** WARNING: You should not compile GNU libc without versioning. Not using *** versioning will introduce incompatibilities so that old binaries *** will not run anymore. *** For versioning you need recent binutils (binutils-2.8.1.0.23 or newer)." fi if test $elf = yes; then AC_CACHE_CHECK(for .previous assembler directive, libc_cv_asm_previous_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_previous_directive=yes else libc_cv_asm_previous_directive=no fi rm -f conftest*]) if test $libc_cv_asm_previous_directive = yes; then AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE) else AC_CACHE_CHECK(for .popsection assembler directive, libc_cv_asm_popsection_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_popsection_directive=yes else libc_cv_asm_popsection_directive=no fi rm -f conftest*]) if test $libc_cv_asm_popsection_directive = yes; then AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE) fi fi AC_CACHE_CHECK(for .protected and .hidden assembler directive, libc_cv_asm_protected_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_protected_directive=yes else libc_cv_asm_protected_directive=no fi rm -f conftest*]) AC_SUBST(libc_cv_asm_protected_directive) AC_DEFINE(HAVE_PROTECTED) AC_DEFINE(HAVE_HIDDEN) if test $libc_cv_asm_protected_directive = yes; then AC_CACHE_CHECK(whether __attribute__((visibility())) is supported, libc_cv_visibility_attribute, [cat > conftest.c <&AS_MESSAGE_LOG_FD); then if grep '\.hidden.*foo' conftest.s >/dev/null; then if grep '\.protected.*bar' conftest.s >/dev/null; then libc_cv_visibility_attribute=yes fi fi fi rm -f conftest.[cs] ]) if test $libc_cv_visibility_attribute = yes; then AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE) fi fi if test $libc_cv_visibility_attribute = yes; then AC_CACHE_CHECK(for broken __attribute__((visibility())), libc_cv_broken_visibility_attribute, [cat > conftest.c <&AS_MESSAGE_LOG_FD); then changequote(,)dnl if grep '\.hidden[ _]foo' conftest.s >/dev/null; then changequote([,])dnl libc_cv_broken_visibility_attribute=no fi fi rm -f conftest.c conftest.s ]) if test $libc_cv_broken_visibility_attribute = yes; then AC_DEFINE(HAVE_BROKEN_VISIBILITY_ATTRIBUTE) fi fi AC_CACHE_CHECK(for broken __attribute__((alias())), libc_cv_broken_alias_attribute, [cat > conftest.c <&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_DEFINE(HAVE_BROKEN_ALIAS_ATTRIBUTE) fi if test $libc_cv_visibility_attribute = yes -a $gnu_ld = yes; then 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 -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 fi AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, libc_cv_initfinit_array, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then if readelf -S conftest | fgrep INIT_ARRAY > /dev/null; then libc_cv_initfinit_array=yes else libc_cv_initfinit_array=no fi else libc_cv_initfinit_array=no fi rm -f conftest*]) AC_SUBST(libc_cv_initfinit_array) if test $libc_cv_initfinit_array = yes; then AC_DEFINE(HAVE_INITFINI_ARRAY) fi AC_CACHE_CHECK(for libunwind-support in compiler, libc_cv_cc_with_libunwind, [dnl AC_TRY_LINK([#include ], [ unw_context_t uc; unw_cursor_t c; unw_getcontext (&uc); unw_init_local (&c, &uc)], libc_cv_cc_with_libunwind=yes, libc_cv_cc_with_libunwind=no)]) AC_SUBST(libc_cv_cc_with_libunwind) if test $libc_cv_cc_with_libunwind = yes; then AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) fi AC_CACHE_CHECK(for -z nodelete option, libc_cv_z_nodelete, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_nodelete=yes else libc_cv_z_nodelete=no fi rm -f conftest*]) AC_SUBST(libc_cv_z_nodelete) AC_CACHE_CHECK(for -z nodlopen option, libc_cv_z_nodlopen, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_nodlopen=yes else libc_cv_z_nodlopen=no fi rm -f conftest*]) AC_SUBST(libc_cv_z_nodlopen) AC_CACHE_CHECK(for -z initfirst option, libc_cv_z_initfirst, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_initfirst=yes else libc_cv_z_initfirst=no fi rm -f conftest*]) AC_SUBST(libc_cv_z_initfirst) AC_CACHE_CHECK(for -z relro option, libc_cv_z_relro, [dnl if AC_TRY_COMMAND([${CC-cc} -v --help 2>&1|grep "z relro" 1>&AS_MESSAGE_LOG_FD]) then libc_cv_z_relro=yes else libc_cv_z_relro=no fi]) AC_SUBST(libc_cv_z_relro) if test $libc_cv_z_relro = yes; then AC_DEFINE(HAVE_Z_RELRO) fi AC_CACHE_CHECK(for -Bgroup option, libc_cv_Bgroup, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_Bgroup=yes else libc_cv_Bgroup=no fi rm -f conftest*]) AC_SUBST(libc_cv_Bgroup) AC_CACHE_CHECK(for libgcc_s suffix, libc_cv_libgcc_s_suffix, [dnl cat > conftest.c <&1 >/dev/null \ | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` changequote([,])dnl rm -f conftest*]) AC_SUBST(libc_cv_libgcc_s_suffix) AC_CACHE_CHECK(for --as-needed option, libc_cv_as_needed, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_as_needed=yes else libc_cv_as_needed=no fi rm -f conftest*]) AC_SUBST(libc_cv_as_needed) ASFLAGS_config= AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, libc_cv_as_noexecstack, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) \ && grep -q .note.GNU-stack conftest.s \ && AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -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 <&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) AC_CACHE_CHECK(for -z execstack, libc_cv_z_execstack, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_z_execstack=yes else libc_cv_z_execstack=no fi rm -f conftest*]) AC_SUBST(libc_cv_z_execstack) AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_fpie=yes else libc_cv_fpie=no fi rm -f conftest*]) AC_SUBST(libc_cv_fpie) fi AC_CACHE_CHECK(for -fno-unit-at-a-time, libc_cv_fno_unit_at_a_time, [dnl cat > conftest.c <&AS_MESSAGE_LOG_FD]) then libc_cv_fno_unit_at_a_time=yes else libc_cv_fno_unit_at_a_time=no fi rm -f conftest*]) if test $libc_cv_fno_unit_at_a_time = yes; then fno_unit_at_a_time=-fno-unit-at-a-time fi AC_SUBST(fno_unit_at_a_time) if test $elf != yes; then AC_CACHE_CHECK(for .init and .fini sections, libc_cv_have_initfini, [AC_TRY_COMPILE(, [asm (".section .init"); asm (".section .fini"); asm ("${libc_cv_dot_text}");], libc_cv_have_initfini=yes, libc_cv_have_initfini=no)]) AC_SUBST(libc_cv_have_initfini)dnl if test $libc_cv_have_initfini = yes; then AC_DEFINE(HAVE_INITFINI) fi fi if test $elf = yes -a $gnu_ld = yes; then AC_CACHE_CHECK(whether cc puts quotes around section names, libc_cv_have_section_quotes, [cat > conftest.c </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.[cs] ]) if test $libc_cv_have_section_quotes = yes; then AC_DEFINE(HAVE_SECTION_QUOTES) fi fi dnl AC_CHECK_ASM_UNDERSCORE([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]) AC_DEFUN(AC_CHECK_ASM_UNDERSCORE, [cat > conftest.$ac_ext </dev/null; then ifelse([$1], , :, [rm -f conftest* $1]) else ifelse([$2], , , [rm -f conftest* $2]) fi else echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD ifelse([$2], , , [rm -f conftest* $2]) fi rm -f conftest*]) if test $elf = yes; then libc_cv_asm_underscores=no else if test $ac_cv_prog_cc_works = yes; then AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, [AC_TRY_LINK([asm ("_glibc_foobar:");], [glibc_foobar ();], libc_cv_asm_underscores=yes, libc_cv_asm_underscores=no)]) else AC_CACHE_CHECK(for _ prefix on C symbol names, libc_cv_asm_underscores, [AC_CHECK_ASM_UNDERSCORE(libc_cv_asm_underscores=yes, libc_cv_asm_underscores=no)]) fi fi if test $libc_cv_asm_underscores = no; then AC_DEFINE(NO_UNDERSCORES) fi if test $elf = yes; then libc_cv_weak_symbols=yes fi AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_weak_directive=yes else libc_cv_asm_weak_directive=no fi rm -f conftest*]) if test $libc_cv_asm_weak_directive = no; then AC_CACHE_CHECK(for assembler .weakext directive, libc_cv_asm_weakext_directive, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_weakext_directive=yes else libc_cv_asm_weakext_directive=no fi rm -f conftest*]) fi # no .weak if test $libc_cv_asm_weak_directive = yes; then AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE) elif test $libc_cv_asm_weakext_directive = yes; then AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) fi dnl The standard hppa assembler uses `;' to start comments and `!' dnl as a line separator. CRIS uses `;' to start comments and `@' for dnl line separator. case "${host_cpu}-${host_os}" in cris*) libc_cv_asm_line_sep='@' AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep) ;; hppa*linux*) AC_CACHE_CHECK(for assembler line separator, libc_cv_asm_line_sep, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_line_sep='!' else if test -z "$enable_hacker_mode"; then echo "*** You need a newer assembler to compile glibc" rm -f conftest* exit 1 fi libc_cv_asm_line_sep=';' fi rm -f conftest*]) AC_DEFINE_UNQUOTED(ASM_LINE_SEP, $libc_cv_asm_line_sep) ;; esac AC_CACHE_CHECK(whether CFI directives are supported, libc_cv_asm_cfi_directives, [dnl cat > conftest.s <&AS_MESSAGE_LOG_FD); then libc_cv_asm_cfi_directives=yes else libc_cv_asm_cfi_directives=no fi rm -f conftest*]) if test $libc_cv_asm_cfi_directives = yes; then AC_DEFINE(HAVE_ASM_CFI_DIRECTIVES) fi AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp, libc_cv_cpp_asm_debuginfo, [dnl cat > conftest.S <&AS_MESSAGE_LOG_FD]) && { ac_pattern='conftest\.S' AC_TRY_COMMAND([readelf --debug-dump=line conftest.o | grep $ac_pattern 1>&AS_MESSAGE_LOG_FD]) }; then libc_cv_cpp_asm_debuginfo=yes else libc_cv_cpp_asm_debuginfo=no fi rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo) if test $libc_cv_cpp_asm_debuginfo = yes; then AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO) fi AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles -Wl,--no-whole-archive -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then libc_cv_ld_no_whole_archive=yes else libc_cv_ld_no_whole_archive=no fi rm -f conftest*]) if test $libc_cv_ld_no_whole_archive = yes; then no_whole_archive=-Wl,--no-whole-archive fi AC_SUBST(no_whole_archive)dnl AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl cat > conftest.c <<\EOF _start () {} int __eh_pc; __throw () {} EOF dnl No \ in command here because it ends up inside ''. if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles -fexceptions -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_exceptions=yes else libc_cv_gcc_exceptions=no fi rm -f conftest*]) if test $libc_cv_gcc_exceptions = yes; then exceptions=-fexceptions fi AC_SUBST(exceptions)dnl if test "$host_cpu" = powerpc ; then # Check for a bug present in at least versions 2.8.x of GCC # and versions 1.0.x of EGCS. AC_CACHE_CHECK(whether clobbering cr0 causes problems,libc_cv_c_asmcr0_bug,[dnl AC_TRY_COMPILE([int tester(int x) { asm ("" : : : "cc"); return x & 123; }],, libc_cv_c_asmcr0_bug='no', libc_cv_c_asmcr0_bug='yes')]) if test "$libc_cv_c_asmcr0_bug" != 'no'; then AC_DEFINE(BROKEN_PPC_ASM_CR0) fi fi AC_CACHE_CHECK(for DWARF2 unwind info support, libc_cv_gcc_dwarf2_unwind_info, [cat > conftest.c <&AS_MESSAGE_LOG_FD]) || AC_TRY_COMMAND([$libc_unwind_check -lgcc_eh -lgcc >&AS_MESSAGE_LOG_FD]) then if $libc_unwind_check -v 2>&1 >/dev/null \ | grep -- --eh-frame-hdr 2>&1 >/dev/null; then libc_cv_gcc_dwarf2_unwind_info=no_registry_needed else libc_cv_gcc_dwarf2_unwind_info=static fi else libc_cv_gcc_dwarf2_unwind_info=no fi if test $libc_cv_gcc_dwarf2_unwind_info = no; then if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -DCHECK__register_frame $LDFLAGS -nostdlib -nostartfiles -o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_dwarf2_unwind_info=yes else libc_cv_gcc_dwarf2_unwind_info=no fi fi rm -f conftest*]) case $libc_cv_gcc_dwarf2_unwind_info in yes) AC_DEFINE(HAVE_DWARF2_UNWIND_INFO) ;; static) AC_DEFINE(HAVE_DWARF2_UNWIND_INFO) AC_DEFINE(HAVE_DWARF2_UNWIND_INFO_STATIC) ;; esac dnl Check whether compiler understands __builtin_expect. AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect, [cat > conftest.c <&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_builtin_expect=yes else libc_cv_gcc_builtin_expect=no fi rm -f conftest*]) if test "$libc_cv_gcc_builtin_expect" = yes; then AC_DEFINE(HAVE_BUILTIN_EXPECT) 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" = yes ; then AC_DEFINE(HAVE_BUILTIN_REDIRECTION) fi dnl Check whether the compiler supports subtraction of local labels. AC_CACHE_CHECK(for local label subtraction, libc_cv_gcc_subtract_local_labels, [cat > conftest.c <&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_subtract_local_labels=yes else libc_cv_gcc_subtract_local_labels=no fi rm -f conftest*]) if test "$libc_cv_gcc_subtract_local_labels" = yes; then AC_DEFINE(HAVE_SUBTRACT_LOCAL_LABELS) fi dnl Check whether the compiler supports the __thread keyword. if test "x$use__thread" != xno; then AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, [cat > conftest.c <<\EOF __thread int a = 42; EOF if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then libc_cv_gcc___thread=yes else libc_cv_gcc___thread=no fi rm -f conftest*]) if test "$libc_cv_gcc___thread" = yes; then AC_DEFINE(HAVE___THREAD) fi else libc_cv_gcc___thread=no fi if test "$libc_cv_gcc___thread" = yes; then dnl Check whether the compiler supports the tls_model attribute. AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl cat > conftest.c <<\EOF extern __thread int a __attribute__((tls_model ("initial-exec"))); EOF if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then libc_cv_gcc_tls_model_attr=yes else libc_cv_gcc_tls_model_attr=no fi rm -f conftest*]) if test "$libc_cv_gcc_tls_model_attr" = yes; then AC_DEFINE(HAVE_TLS_MODEL_ATTRIBUTE) fi fi 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="$LIBS -lgd -lpng -lz -lm" AC_TRY_LINK([#include ], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) CFLAGS="$old_CFLAGS" LDFLAGS="$old_LDFLAGS" LIBS="$old_LIBS" else LIBGD=no fi AC_MSG_RESULT($LIBGD) AC_SUBST(LIBGD) dnl check for the size of 'long double'. AC_CHECK_SIZEOF(long double, 0) sizeof_long_double=$ac_cv_sizeof_long_double AC_SUBST(sizeof_long_double) ### 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_gcc_unwind_find_fde=no libc_cv_idn=no # Iterate over all the sysdep directories we will use, running their # configure fragments, and looking for a uname implementation. uname= 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) . $dest/configure fi [ if test -z "$uname"; then if test -r $dest/uname.c || test -r $dest/uname.S || { test -r $dest/syscalls.list && grep '^uname[ ]' $dest/syscalls.list >/dev/null; }; then uname=$dir fi fi ]dnl done if test x$libc_cv_gcc_unwind_find_fde = xyes; then AC_DEFINE(EXPORT_UNWIND_FIND_FDE) fi AC_SUBST(libc_cv_gcc_unwind_find_fde) # If we will use the generic uname implementation, we must figure out what # it will say by examining the system, and write the results in config-name.h. if test "$uname" = "sysdeps/generic"; then changequote(,)dnl uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'` changequote([,])dnl if test $uname_sysname != $config_os; then config_release=`echo $config_os | sed s/$uname_sysname//` fi dnl AC_DEFUN(LIBC_KERNEL_ID, [dnl if test -r /vmunix; then kernel_id=`strings /vmunix | grep UNIX` elif test -r /dynix; then kernel_id=`strings /dynix | grep DYNIX` else kernel_id= fi ])dnl AC_CACHE_CHECK(OS release for uname, libc_cv_uname_release, [dnl LIBC_KERNEL_ID changequote(,)dnl kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'` changequote([,])dnl if test x`echo "$config_release" | sed "s/^$kernel_release//"` \ != x$config_release; then # The configuration release is a substring of the kernel release. libc_cv_uname_release=$kernel_release elif test x$config_release != x; then libc_cv_uname_release=$config_release elif test x$kernel_release != x; then libc_cv_uname_release=$kernel_release else libc_cv_uname_release=unknown fi]) uname_release="$libc_cv_uname_release" AC_CACHE_CHECK(OS version for uname, libc_cv_uname_version, [dnl LIBC_KERNEL_ID changequote(,)dnl kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'` changequote([,])dnl if test -n "$kernel_version"; then libc_cv_uname_version="$kernel_version" else libc_cv_uname_version=unknown fi]) uname_version="$libc_cv_uname_version" AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl config_uname=config-name.h:config-name.in else # For non-generic uname, we don't need to create config-name.h at all. config_uname= fi dnl This is tested by existing code and it's simpler to avoid changing it. AC_DEFINE(USE_IN_LIBIO) # Test for old glibc 2.0.x headers so that they can be removed properly # Search only in includedir. AC_MSG_CHECKING(for old glibc 2.0.x headers) if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h" then old_glibc_headers=yes else old_glibc_headers=no fi AC_MSG_RESULT($old_glibc_headers) if test ${old_glibc_headers} = yes; then AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will) AC_MSG_WARN(*** be removed.) fi AC_SUBST(old_glibc_headers) AC_SUBST(libc_cv_slibdir) AC_SUBST(libc_cv_localedir) AC_SUBST(libc_cv_sysconfdir) AC_SUBST(libc_cv_rootsbindir) AC_SUBST(libc_cv_forced_unwind) AC_SUBST(use_ldconfig) AC_SUBST(ldd_rewrite_script) AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(xcoff) if test $gnu_ld = yes; then AC_DEFINE(HAVE_GNU_LD) fi if test $gnu_as = yes; then AC_DEFINE(HAVE_GNU_AS) fi if test $elf = yes; then AC_DEFINE(HAVE_ELF) fi if test $xcoff = yes; then AC_DEFINE(HAVE_XCOFF) fi AC_SUBST(static) AC_SUBST(shared) if test $shared = default; then if test $gnu_ld = yes; then shared=$elf else # For now we do not assume shared libs are available. In future more # tests might become available. shared=no fi fi if test x"$libc_cv_idn" = xyes; then AC_DEFINE(HAVE_LIBIDN) fi AC_CACHE_CHECK([whether -fPIC is default], pic_default, [pic_default=yes cat > conftest.c <&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then pic_default=no fi rm -f conftest.*]) AC_SUBST(pic_default) AC_SUBST(profile) AC_SUBST(omitfp) AC_SUBST(bounded) AC_SUBST(static_nss) AC_SUBST(nopic_initfini) AC_SUBST(DEFINES) case "$add_ons" in *door*) linux_doors=yes ;; *) linux_doors=no ;; esac AC_SUBST(linux_doors) dnl See sysdeps/mach/configure.in for this variable. AC_SUBST(mach_interface_list) if test "`(cd $srcdir; pwd)`" = "`pwd`"; then config_makefile= else config_makefile=Makefile fi 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 ${config_makefile} ${config_uname}]) 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