mirror of
https://github.com/moparisthebest/pacman
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104 lines
3.3 KiB
Plaintext
104 lines
3.3 KiB
Plaintext
dnl acinclude.m4 - configure macros used by pacman and libalpm
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dnl Add some custom macros for pacman and libalpm
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dnl GCC_STACK_PROTECT_LIB
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dnl adds -lssp to LIBS if it is available
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dnl ssp is usually provided as part of libc, but was previously a separate lib
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dnl It does not hurt to add -lssp even if libc provides SSP - in that case
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dnl libssp will simply be ignored.
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AC_DEFUN([GCC_STACK_PROTECT_LIB],[
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AC_CACHE_CHECK([whether libssp exists], ssp_cv_lib,
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[ssp_old_libs="$LIBS"
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LIBS="$LIBS -lssp"
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AC_TRY_LINK(,, ssp_cv_lib=yes, ssp_cv_lib=no)
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LIBS="$ssp_old_libs"
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])
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if test $ssp_cv_lib = yes; then
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LIBS="$LIBS -lssp"
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fi
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])
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dnl GCC_STACK_PROTECT_CC
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dnl checks -fstack-protector-all with the C compiler, if it exists then updates
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dnl CFLAGS and defines ENABLE_SSP_CC
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AC_DEFUN([GCC_STACK_PROTECT_CC],[
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AC_LANG_ASSERT(C)
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if test "X$CC" != "X"; then
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AC_CACHE_CHECK([whether ${CC} accepts -fstack-protector-all],
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ssp_cv_cc,
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[ssp_old_cflags="$CFLAGS"
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CFLAGS="$CFLAGS -fstack-protector-all"
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AC_TRY_COMPILE(,, ssp_cv_cc=yes, ssp_cv_cc=no)
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CFLAGS="$ssp_old_cflags"
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])
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if test $ssp_cv_cc = yes; then
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CFLAGS="$CFLAGS -fstack-protector-all"
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AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.])
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fi
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fi
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])
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dnl GCC_FORTIFY_SOURCE_CC
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dnl checks -D_FORTIFY_SOURCE with the C compiler, if it exists then updates
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dnl CFLAGS
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AC_DEFUN([GCC_FORTIFY_SOURCE_CC],[
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AC_LANG_ASSERT(C)
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if test "X$CC" != "X"; then
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AC_MSG_CHECKING(for FORTIFY_SOURCE support)
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AC_TRY_COMPILE([#include <features.h>], [
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int main() {
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#if !(__GNUC_PREREQ (4, 1) )
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#error No FORTIFY_SOURCE support
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#endif
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return 0;
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}
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], [
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AC_MSG_RESULT(yes)
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CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
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], [
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AC_MSG_RESULT(no)
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])
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fi
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])
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dnl GCC_VISIBILITY_CC
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dnl checks -fvisibility=internal with the C compiler, if it exists then
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dnl defines ENABLE_VISIBILITY_CC in both configure script and Makefiles
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AC_DEFUN([GCC_VISIBILITY_CC],[
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AC_LANG_ASSERT(C)
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if test "X$CC" != "X"; then
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AC_CACHE_CHECK([whether ${CC} accepts -fvisibility=internal],
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visibility_cv_cc,
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[visibility_old_cflags="$CFLAGS"
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CFLAGS="$CFLAGS -fvisibility=internal"
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AC_TRY_COMPILE(,, visibility_cv_cc=yes, visibility_cv_cc=no)
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CFLAGS="$visibility_old_cflags"
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])
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if test $visibility_cv_cc = yes; then
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AC_DEFINE([ENABLE_VISIBILITY_CC], 1, [Define if symbol visibility C support is enabled.])
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fi
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AM_CONDITIONAL([ENABLE_VISIBILITY_CC], test "x$visibility_cv_cc" = "xyes")
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fi
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])
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dnl GCC_GNU89_INLINE_CC
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dnl checks -fgnu89-inline with the C compiler, if it exists then defines
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dnl ENABLE_GNU89_INLINE_CC in both configure script and Makefiles
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AC_DEFUN([GCC_GNU89_INLINE_CC],[
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AC_LANG_ASSERT(C)
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if test "X$CC" != "X"; then
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AC_CACHE_CHECK([for -fgnu89-inline],
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gnu89_inline_cv_cc,
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[ gnu89_inline_old_cflags="$CFLAGS"
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CFLAGS="$CFLAGS -fgnu89-inline"
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AC_TRY_COMPILE(,, gnu89_inline_cv_cc=yes, gnu89_inline_cv_cc=no)
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CFLAGS="$gnu89_inline_old_cflags"
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])
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if test $gnu89_inline_cv_cc = yes; then
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AC_DEFINE([ENABLE_GNU89_INLINE_CC], 1, [Define if gnu89 inlining semantics should be used.])
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fi
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AM_CONDITIONAL([ENABLE_GNU89_INLINE_CC], test "x$gnu89_inline_cv_cc" = "xyes")
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fi
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])
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