150 lines
4.1 KiB
Plaintext
150 lines
4.1 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(2.59)
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AC_INIT(libgcc-math, 1.0)
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AC_CONFIG_SRCDIR(configure.ac)
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AC_CANONICAL_SYSTEM
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AM_INIT_AUTOMAKE
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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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[ --enable-version-specific-runtime-libs 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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AM_MAINTAINER_MODE
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AC_EXEEXT
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AM_ENABLE_MULTILIB(, ..)
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target_alias=${target_alias-$host_alias}
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AC_SUBST(target_alias)
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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([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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AC_SUBST(CFLAGS)
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if test "x$GCC" != "xyes"; then
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AC_MSG_ERROR([libgcc-math must be built with GCC])
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fi
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AC_PROG_CPP
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AM_PROG_AS
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AC_MSG_CHECKING([whether hidden visibility is supported])
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AC_TRY_COMPILE([
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void __attribute__((visibility ("hidden"))) bar (void) {}],,
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[gccm_hidden=yes],[gccm_hidden=no])
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AC_MSG_RESULT($gccm_hidden)
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if test x$gccm_hidden = xyes; then
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AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported])
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fi
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AC_MSG_CHECKING([whether symbol versioning is supported])
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cat > conftest.map <<EOF
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FOO_1.0 {
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global: *foo*; bar; local: *;
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};
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EOF
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save_LDFLAGS="$LDFLAGS"
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LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
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AC_TRY_LINK([int foo;],[],[gccm_use_symver=yes],[gccm_use_symver=no])
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LDFLAGS="$save_LDFLAGS"
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AC_MSG_RESULT($gccm_use_symver)
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AM_CONDITIONAL(LIBGCCM_USE_SYMVER, [test "x$gccm_use_symver" = xyes])
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AC_MSG_CHECKING([whether we are a 32bit target])
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save_CFLAGS="$CFLAGS"
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CFLAGS="-O2"
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AC_TRY_LINK(,[
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if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
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;
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else
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undefined_function ();
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],
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target_ilp32=yes,
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target_ilp32=no)
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CFLAGS="$save_CFLAGS"
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AM_CONDITIONAL(TARGET_ILP32, [test "x$target_ilp32" = xyes])
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AM_PROG_LIBTOOL
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AC_SUBST(enable_shared)
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AC_SUBST(enable_static)
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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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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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GCC_HEADER_STDINT(gstdint.h)
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# Now check which parts we include in the library.
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arch_subdirs=
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case "${target}" in
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i?86-* | x86_64-* )
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# Handle multilib cases
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if test "x$target_ilp32" = xyes; then
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arch_subdirs="i386"
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arch_libraries="i386/libsse2.la"
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arch_maps="i386/sse2.map"
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fi ;;
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*)
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;;
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esac
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AC_SUBST(arch_subdirs)
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AC_SUBST(arch_libraries)
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AC_SUBST(arch_maps)
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AM_CONDITIONAL(BUILD_LIBGCC_MATH, [test "x$arch_subdirs" != x])
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AC_CONFIG_FILES([Makefile i386/Makefile])
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AC_OUTPUT
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