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-rw-r--r--fontconfig/configure.ac18
1 files changed, 17 insertions, 1 deletions
diff --git a/fontconfig/configure.ac b/fontconfig/configure.ac
index 1270ba5bf..870979df8 100644
--- a/fontconfig/configure.ac
+++ b/fontconfig/configure.ac
@@ -136,7 +136,23 @@ AC_TYPE_PID_T
# Checks for library functions.
AC_FUNC_VPRINTF
AC_FUNC_MMAP
-AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp strchr strrchr strtol getopt getopt_long sysconf ftruncate chsize rand random lrand48 random_r rand_r regcomp regerror regexec regfree posix_fadvise fstatvfs fstatfs])
+AC_CHECK_FUNCS([geteuid getuid link memmove memset mkstemp strchr strrchr strtol getopt getopt_long sysconf ftruncate chsize rand random lrand48 random_r rand_r regcomp regerror regexec regfree fstatvfs fstatfs])
+
+dnl AC_CHECK_FUNCS doesn't check for header files.
+dnl posix_fadvise() may be not available in older libc.
+fc_saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS $WARN_CFLAGS -Werror"
+AC_MSG_CHECKING([for posix_fadvise])
+AC_LINK_IFELSE([AC_LANG_SOURCE([[
+ #include <fcntl.h>
+ int main(void) {
+ return posix_fadvise(0, 0, 0, 0);
+ }
+ ]])],[
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([HAVE_POSIX_FADVISE], [1], [Define to 1 if you have the `posix_fadvise' function.])
+ ],[AC_MSG_RESULT([no])])
+CFLAGS="$fc_saved_CFLAGS"
#
if test "x$ac_cv_func_fstatvfs" = "xyes"; then