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 CPPFLAGS AC_DEFUN([GCC_FORTIFY_SOURCE_CC],[ AC_LANG_ASSERT(C) if test "X$CC" != "X"; then AC_MSG_CHECKING(for FORTIFY_SOURCE support) fs_old_cppflags="$CPPFLAGS" fs_old_cflags="$CFLAGS" CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2" CFLAGS="$CFLAGS -Werror" AC_TRY_COMPILE([#include <features.h>], [ int main() { #if !(__GNUC_PREREQ (4, 1) ) #error No FORTIFY_SOURCE support #endif return 0; } ], [ AC_MSG_RESULT(yes) CFLAGS="$fs_old_cflags" ], [ AC_MSG_RESULT(no) CPPFLAGS="$fs_old_cppflags" CFLAGS="$fs_old_cflags" ]) 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 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="${CFLAGS} -Werror=unknown-warning-option" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [], [CFLAGS="$save_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 ])