diff options
Diffstat (limited to 'm4/acinclude.m4')
| -rw-r--r-- | m4/acinclude.m4 | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/m4/acinclude.m4 b/m4/acinclude.m4 new file mode 100644 index 00000000..4455d261 --- /dev/null +++ b/m4/acinclude.m4 @@ -0,0 +1,170 @@ +dnl acinclude.m4 - configure macros used by pacman and libalpm +dnl Add some custom macros for pacman and libalpm + +dnl GCC_STACK_PROTECT_LIB +dnl adds -lssp to LIBS if it is available +dnl ssp is usually provided as part of libc, but was previously a separate lib +dnl It does not hurt to add -lssp even if libc provides SSP - in that case +dnl libssp will simply be ignored. +AC_DEFUN([GCC_STACK_PROTECT_LIB],[ + AC_CACHE_CHECK([whether libssp exists], ssp_cv_lib, + [ssp_old_libs="$LIBS" + LIBS="$LIBS -lssp" + AC_TRY_LINK(,, ssp_cv_lib=yes, ssp_cv_lib=no) + LIBS="$ssp_old_libs" + ]) + if test $ssp_cv_lib = yes; then + LIBS="$LIBS -lssp" + fi +]) + +dnl GCC_STACK_PROTECT_CC +dnl checks -fstack-protector-all with the C compiler, if it exists then updates +dnl CFLAGS and defines ENABLE_SSP_CC +AC_DEFUN([GCC_STACK_PROTECT_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_CACHE_CHECK([whether ${CC} accepts -fstack-protector-all], + ssp_cv_cc, + [ssp_old_cflags="$CFLAGS" + CFLAGS="$CFLAGS -fstack-protector-all" + AC_TRY_COMPILE(,, ssp_cv_cc=yes, ssp_cv_cc=no) + CFLAGS="$ssp_old_cflags" + ]) + if test $ssp_cv_cc = yes; then + CFLAGS="$CFLAGS -fstack-protector-all" + AC_DEFINE([ENABLE_SSP_CC], 1, [Define if SSP C support is enabled.]) + fi + fi +]) + +dnl GCC_FORTIFY_SOURCE_CC +dnl checks -D_FORTIFY_SOURCE with the C compiler, if it exists then updates +dnl CFLAGS +AC_DEFUN([GCC_FORTIFY_SOURCE_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_MSG_CHECKING(for FORTIFY_SOURCE support) + AC_TRY_COMPILE([#include <features.h>], [ + int main() { + #if !(__GNUC_PREREQ (4, 1) ) + #error No FORTIFY_SOURCE support + #endif + return 0; + } + ], [ + AC_MSG_RESULT(yes) + CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2" + ], [ + AC_MSG_RESULT(no) + ]) + fi +]) + +dnl GCC_VISIBILITY_CC +dnl checks -fvisibility=internal with the C compiler, if it exists then +dnl defines ENABLE_VISIBILITY_CC in both configure script and Makefiles +AC_DEFUN([GCC_VISIBILITY_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_CACHE_CHECK([whether ${CC} accepts -fvisibility=internal], + visibility_cv_cc, + [visibility_old_cflags="$CFLAGS" + CFLAGS="$CFLAGS -fvisibility=internal" + AC_TRY_COMPILE(,, visibility_cv_cc=yes, visibility_cv_cc=no) + CFLAGS="$visibility_old_cflags" + ]) + if test $visibility_cv_cc = yes; then + AC_DEFINE([ENABLE_VISIBILITY_CC], 1, [Define if symbol visibility C support is enabled.]) + fi + AM_CONDITIONAL([ENABLE_VISIBILITY_CC], test "x$visibility_cv_cc" = "xyes") + fi +]) + +dnl GCC_GNU89_INLINE_CC +dnl checks -fgnu89-inline with the C compiler, if it exists then defines +dnl ENABLE_GNU89_INLINE_CC in both configure script and Makefiles +AC_DEFUN([GCC_GNU89_INLINE_CC],[ + AC_LANG_ASSERT(C) + if test "X$CC" != "X"; then + AC_CACHE_CHECK([for -fgnu89-inline], + gnu89_inline_cv_cc, + [ gnu89_inline_old_cflags="$CFLAGS" + CFLAGS="$CFLAGS -fgnu89-inline" + AC_TRY_COMPILE(,, gnu89_inline_cv_cc=yes, gnu89_inline_cv_cc=no) + CFLAGS="$gnu89_inline_old_cflags" + ]) + if test $gnu89_inline_cv_cc = yes; then + AC_DEFINE([ENABLE_GNU89_INLINE_CC], 1, [Define if gnu89 inlining semantics should be used.]) + fi + AM_CONDITIONAL([ENABLE_GNU89_INLINE_CC], test "x$gnu89_inline_cv_cc" = "xyes") + fi +]) + +dnl CFLAGS_ADD(PARAMETER, VARIABLE) +dnl Adds parameter to VARIABLE if the compiler supports it. For example, +dnl CFLAGS_ADD([-Wall],[WARN_FLAGS]). +AC_DEFUN([CFLAGS_ADD], +[AS_VAR_PUSHDEF([my_cflags], [cflags_cv_warn_$1])dnl +AC_CACHE_CHECK([whether compiler handles $1], [my_cflags], [ + save_CFLAGS="$CFLAGS" + CFLAGS="${CFLAGS} $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + [AS_VAR_SET([my_cflags], [yes])], + [AS_VAR_SET([my_cflags], [no])]) + CFLAGS="$save_CFLAGS" +]) +AS_VAR_PUSHDEF([new_cflags], [[$2]])dnl +AS_VAR_IF([my_cflags], [yes], [AS_VAR_APPEND([new_cflags], [" $1"])]) +AS_VAR_POPDEF([new_cflags])dnl +AS_VAR_POPDEF([my_cflags])dnl +m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl +]) + +dnl Checks for getmntinfo and determines whether it uses statfs or statvfs +AC_DEFUN([FS_STATS_TYPE], + [AC_CACHE_CHECK([filesystem statistics type], fs_stats_cv_type, + [AC_CHECK_FUNC(getmntinfo, + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[ +# include <sys/param.h> +# include <sys/mount.h> +#if HAVE_SYS_UCRED_H +#include <sys/ucred.h> +#endif +extern int getmntinfo (struct statfs **, int); +]], + [])], + [fs_stats_cv_type="struct statfs"], + [fs_stats_cv_type="struct statvfs"])], + [AC_CHECK_FUNC(getmntent, + [fs_stats_cv_type="struct statvfs"])] + )] + ) + AC_DEFINE_UNQUOTED(FSSTATSTYPE, [$fs_stats_cv_type], + [Defined as the filesystem stats type ('statvfs' or 'statfs')]) + if test $ac_cv_func_getmntinfo = yes; then + if test "$fs_stats_cv_type" = "struct statvfs"; then + AC_DEFINE([HAVE_GETMNTINFO_STATVFS], 1, [Define if getmntinfo() uses statvfs.]) + else + AC_DEFINE([HAVE_GETMNTINFO_STATFS], 1, [Define if getmntinfo() uses statfs.]) + fi + fi +]) + +dnl Checks for PATH_MAX and defines it if not present +AC_DEFUN([PATH_MAX_DEFINED], + [AC_CACHE_CHECK([PATH_MAX defined], path_max_cv_defined, + [AC_EGREP_CPP(yes, [[ +#include <limits.h> +#if defined(PATH_MAX) +yes +#endif +]], + [path_max_cv_defined=yes], + [path_max_cv_defined=no])] + ) + if test $path_max_cv_defined = no; then + AC_DEFINE([PATH_MAX], 4096, [Define if PATH_MAX is undefined by limits.h.]) + fi +]) |