369 lines
12 KiB
Plaintext
369 lines
12 KiB
Plaintext
# Process this file with autoconf to produce a configure script, like so:
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# aclocal && autoconf && autoheader && automake
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AC_PREREQ(2.64)
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AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
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AC_CONFIG_HEADER(config.h)
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# Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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#
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# You will slowly go insane if you do not grok the following fact: when
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# building this library, the top-level /target/ becomes the library's /host/.
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#
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# configure then causes --target to default to --host, exactly like any
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# other package using autoconf. Therefore, 'target' and 'host' will
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# always be the same. This makes sense both for native and cross compilers
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# just think about it for a little while. :-)
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#
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# Also, if this library is being configured as part of a cross compiler, the
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# top-level configure script will pass the "real" host as $with_cross_host.
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#
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# Do not delete or change the following two lines. For why, see
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# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
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AC_CANONICAL_SYSTEM
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ACX_NONCANONICAL_TARGET
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target_alias=${target_alias-$host_alias}
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AC_SUBST(target_alias)
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AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Wno-override -Werror])
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AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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AC_ARG_ENABLE(version-specific-runtime-libs,
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AS_HELP_STRING([--enable-version-specific-runtime-libs],
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[specify that runtime libraries should be installed in a compiler-specific directory]),
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[case "$enableval" in
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yes) version_specific_libs=yes ;;
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no) version_specific_libs=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[version_specific_libs=no])
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AC_MSG_RESULT($version_specific_libs)
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GCC_NO_EXECUTABLES
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AC_USE_SYSTEM_EXTENSIONS
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# See if makeinfo has been installed and is modern enough
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# that we can use it.
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ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
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[GNU texinfo.* \([0-9][0-9.]*\)],
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[4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
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AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
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ACX_BUGURL([http://gcc.gnu.org/bugs.html])
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# Configure libtool
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AM_PROG_LIBTOOL
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ACX_LT_HOST_FLAGS
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AC_SUBST(enable_shared)
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AC_SUBST(enable_static)
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AM_MAINTAINER_MODE
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AM_ENABLE_MULTILIB(, ..)
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AC_LANG_C
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# The same as in boehm-gc and libstdc++. Have to borrow it from there.
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# We must force CC to /not/ be precious variables; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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AM_PROG_CC_C_O
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if test "x$GCC" != "xyes"; then
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AC_MSG_ERROR([libquadmath must be built with GCC])
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fi
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AC_PROG_CPP
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# Calculate toolexeclibdir
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# Also toolexecdir, though it's only used in toolexeclibdir
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case ${version_specific_libs} in
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yes)
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# Need the gcc compiler version to know where to install libraries
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# and header files if --enable-version-specific-runtime-libs option
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# is selected.
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toolexecdir='$(libdir)/gcc/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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;;
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no)
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if test -n "$with_cross_host" &&
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test x"$with_cross_host" != x"no"; then
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# Install a library built with a cross compiler in tooldir, not libdir.
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toolexecdir='$(exec_prefix)/$(target_alias)'
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toolexeclibdir='$(toolexecdir)/lib'
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else
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toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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toolexeclibdir='$(libdir)'
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fi
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multi_os_directory=`$CC -print-multi-os-directory`
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case $multi_os_directory in
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.) ;; # Avoid trailing /.
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*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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esac
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;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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AC_CHECK_HEADERS(fenv.h langinfo.h locale.h wchar.h wctype.h limits.h ctype.h printf.h errno.h)
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LIBQUAD_CHECK_MATH_H_SIGNGAM
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# If available, sqrtl and cbrtl speed up the calculation -
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# but they are not required
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if test x$gcc_no_link != xyes; then
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AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
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AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
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AC_CHECK_LIB([m],[feholdexcept],[AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])])
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AC_CHECK_LIB([m],[fesetround],[AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])])
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AC_CHECK_LIB([m],[feupdateenv],[AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])])
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AC_CHECK_LIB([m],[fesetenv],[AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])])
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AC_CHECK_LIB([m],[fetestexcept],[AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])])
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AC_CHECK_FUNCS(strtoull)
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else
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if test "x$ac_cv_lib_m_sqrtl" = x""yes; then
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AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])
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fi
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if test "x$ac_cv_lib_m_cbrtl" = x""yes; then
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AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])
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fi
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if test "x$ac_cv_lib_m_feholdexcept" = x""yes; then
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AC_DEFINE([HAVE_FEHOLDEXCEPT],[1],[libm includes feholdexcept])
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fi
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if test "x$ac_cv_lib_m_fesetround" = x""yes; then
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AC_DEFINE([HAVE_FESETROUND],[1],[libm includes fesetround])
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fi
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if test "x$ac_cv_lib_m_feupdateenv" = x""yes; then
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AC_DEFINE([HAVE_FEUPDATEENV],[1],[libm includes feupdateenv])
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fi
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if test "x$ac_cv_lib_m_fesetenv" = x""yes; then
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AC_DEFINE([HAVE_FESETENV],[1],[libm includes fesetenv])
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fi
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if test "x$ac_cv_lib_m_fetestexcept" = x""yes; then
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AC_DEFINE([HAVE_FETESTEXCEPT],[1],[libm includes fetestexcept])
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fi
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fi
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# Check for hidden visibility (copied from libssp).
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror"
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AC_MSG_CHECKING([whether hidden visibility is supported])
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AC_TRY_COMPILE([
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void __attribute__((visibility ("hidden"))) bar (void) {}],,
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[quadmath_hidden=yes],[quadmath_hidden=no])
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AC_MSG_RESULT($quadmath_hidden)
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if test x$quadmath_hidden = xyes; then
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AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
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fi
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CFLAGS="$saved_CFLAGS"
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# Check for symbol versioning (copied from libssp).
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AC_MSG_CHECKING([whether symbol versioning is supported])
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AC_ARG_ENABLE(symvers,
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AS_HELP_STRING([--disable-symvers],
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[disable symbol versioning for libquadmath]),
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quadmath_use_symver=$enableval,
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quadmath_use_symver=yes)
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if test "x$quadmath_use_symver" != xno; then
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if test x$gcc_no_link = xyes; then
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# If we cannot link, we cannot build shared libraries, so do not use
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# symbol versioning.
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quadmath_use_symver=no
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else
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
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cat > conftest.map <<EOF
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FOO_1.0 {
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global: *foo*; bar; local: *;
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};
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EOF
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AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no])
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if test x$quadmath_use_symver = xno; then
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case "$target_os" in
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solaris2*)
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LDFLAGS="$save_LDFLAGS"
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LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
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# Sun ld cannot handle wildcards and treats all entries as undefined.
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cat > conftest.map <<EOF
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FOO_1.0 {
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global: foo; local: *;
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};
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EOF
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AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
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;;
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esac
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fi
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LDFLAGS="$save_LDFLAGS"
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fi
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fi
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AC_MSG_RESULT($quadmath_use_symver)
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AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
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AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
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AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
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AC_CACHE_CHECK([whether __float128 is supported], [libquad_cv_have_float128],
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[GCC_TRY_COMPILE_OR_LINK([
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typedef _Complex float __attribute__((mode(TC))) __complex128;
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__float128 foo (__float128 x)
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{
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__complex128 z1, z2;
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z1 = x;
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z2 = x / 7.Q;
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z2 /= z1;
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return (__float128) z2;
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}
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__float128 bar (__float128 x)
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{
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return x * __builtin_huge_valq ();
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}
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],[
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foo (1.2Q);
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bar (1.2Q);
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],[
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libquad_cv_have_float128=yes
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],[
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libquad_cv_have_float128=no
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])])
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AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_cv_have_float128" = xyes])
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# Check for printf hook support.
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AC_MSG_CHECKING([whether printf hooks are supported])
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AC_TRY_COMPILE([
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#include <printf.h>
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#include <stdarg.h>
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#include <stdlib.h>
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extern void flt128_va (void *, va_list *);
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extern int flt128_ais (const struct printf_info *, size_t, int *, int *);
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extern int flt128_printf_fp (FILE *, const struct printf_info *, const void *const *);
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],[
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int pa_flt128 = register_printf_type (flt128_va);
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int mod_Q = register_printf_modifier (L"Q");
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int res = register_printf_specifier ('f', flt128_printf_fp, flt128_ais);
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struct printf_info info = { .user = -1 };
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],
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[quadmath_printf_hooks=yes],[quadmath_printf_hooks=no])
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AC_MSG_RESULT($quadmath_printf_hooks)
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if test x$quadmath_printf_hooks = xyes; then
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AC_DEFINE([HAVE_PRINTF_HOOKS],[1],[GNU C Library stype printf hooks supported])
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fi
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# Check for whether locale support for quadmath_snprintf or Q printf hooks
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# should be provided.
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AC_MSG_CHECKING([whether nl_langinfo should be used])
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AC_TRY_COMPILE([#include <langinfo.h>],[
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const char *s;
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s = nl_langinfo (DECIMAL_POINT);
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s = nl_langinfo (MON_DECIMAL_POINT);
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s = nl_langinfo (GROUPING);
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s = nl_langinfo (MON_GROUPING);
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s = nl_langinfo (THOUSANDS_SEP);
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s = nl_langinfo (MON_THOUSANDS_SEP);
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(void) s;
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],
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[quadmath_use_nl_langinfo=yes],[quadmath_use_nl_langinfo=no])
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AC_MSG_RESULT($quadmath_use_nl_langinfo)
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if test x$quadmath_use_nl_langinfo = xyes; then
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AC_DEFINE([USE_NL_LANGINFO],[1],[whether nl_langinfo should be used])
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fi
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AC_MSG_CHECKING([whether nl_langinfo should be used for wide char locale info])
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AC_TRY_COMPILE([#include <langinfo.h>],[
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const char *s;
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s = nl_langinfo (_NL_NUMERIC_DECIMAL_POINT_WC);
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s = nl_langinfo (_NL_MONETARY_DECIMAL_POINT_WC);
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s = nl_langinfo (_NL_NUMERIC_THOUSANDS_SEP_WC);
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s = nl_langinfo (_NL_MONETARY_THOUSANDS_SEP_WC);
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(void) s;
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],
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[quadmath_use_nl_langinfo_wc=yes],[quadmath_use_nl_langinfo_wc=no])
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AC_MSG_RESULT($quadmath_use_nl_langinfo_wc)
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if test x$quadmath_use_nl_langinfo_wc = xyes; then
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AC_DEFINE([USE_NL_LANGINFO_WC],[1],[whether nl_langinfo should be used for wide char locale info])
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fi
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AC_MSG_CHECKING([whether localeconv should be used])
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AC_TRY_COMPILE([#include <locale.h>],[
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const struct lconv *l = localeconv ();
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const char *s;
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s = l->decimal_point;
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s = l->mon_decimal_point;
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s = l->grouping;
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s = l->mon_grouping;
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s = l->thousands_sep;
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s = l->mon_thousands_sep;
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(void) s;
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],
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[quadmath_use_localeconv=yes],[quadmath_use_localeconv=no])
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AC_MSG_RESULT($quadmath_use_localeconv)
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if test x$quadmath_use_localeconv = xyes; then
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AC_DEFINE([USE_LOCALECONV],[1],[whether localeconv should be used])
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fi
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# Check for whether i18n number rewriting support for quadmath_snprintf
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# or Q printf hooks should be provided.
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AC_MSG_CHECKING([whether i18n number rewriting support for quadmath_snprintf should be added])
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AC_TRY_COMPILE([#include <langinfo.h>
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#include <limits.h>
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#include <string.h>
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#include <wchar.h>
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#include <wctype.h>],[
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const char *s;
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char decimal[MB_LEN_MAX];
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wctrans_t map = wctrans ("to_outpunct");
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wint_t wdecimal = towctrans (L'.', map);
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mbstate_t state;
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memset (&state, '\0', sizeof (state));
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wcrtomb (decimal, wdecimal, &state);
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s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_MB);
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s = nl_langinfo (_NL_CTYPE_OUTDIGIT0_WC);
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s = nl_langinfo (_NL_CTYPE_MB_CUR_MAX);
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(void) s;
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],
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[quadmath_use_i18n_number_h=yes],[quadmath_use_i18n_number_h=no])
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AC_MSG_RESULT($quadmath_use_i18n_number_h)
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if test x$quadmath_use_i18n_number_h = xyes; then
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AC_DEFINE([USE_I18N_NUMBER_H],[1],[whether i18n number rewriting can be supported])
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fi
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AC_CACHE_SAVE
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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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# We would like our source tree to be readonly. However when releases or
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# pre-releases are generated, the flex/bison generated files as well as the
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# various formats of manuals need to be included along with the rest of the
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# sources. Therefore we have --enable-generated-files-in-srcdir to do
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# just that.
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AC_MSG_CHECKING(generated-files-in-srcdir)
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AC_ARG_ENABLE(generated-files-in-srcdir,
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AS_HELP_STRING([--enable-generated-files-in-srcdir],
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[put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
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[case "$enableval" in
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yes) enable_generated_files_in_srcdir=yes ;;
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no) enable_generated_files_in_srcdir=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[enable_generated_files_in_srcdir=no])
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AC_MSG_RESULT($enable_generated_files_in_srcdir)
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AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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AC_CONFIG_FILES(Makefile)
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AC_OUTPUT
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