diff options
Diffstat (limited to 'autoconf/m4/header_mmap_anonymous.m4')
| -rw-r--r-- | autoconf/m4/header_mmap_anonymous.m4 | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/autoconf/m4/header_mmap_anonymous.m4 b/autoconf/m4/header_mmap_anonymous.m4 index 409189b..541926b 100644 --- a/autoconf/m4/header_mmap_anonymous.m4 +++ b/autoconf/m4/header_mmap_anonymous.m4 @@ -5,18 +5,17 @@ AC_DEFUN([AC_HEADER_MMAP_ANONYMOUS], [AC_CACHE_CHECK(for MAP_ANONYMOUS vs. MAP_ANON, ac_cv_header_mmap_anon, -[AC_LANG_SAVE - AC_LANG_C - AC_TRY_COMPILE([#include <sys/mman.h> - #include <unistd.h> - #include <fcntl.h>], - [mmap (0, 1, PROT_READ, MAP_ANONYMOUS, -1, 0); return (0);], - ac_cv_header_mmap_anon=yes, ac_cv_header_mmap_anon=no) - AC_LANG_RESTORE +[ AC_LANG_PUSH([C]) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM( + [[#include <sys/mman.h> +#include <unistd.h> +#include <fcntl.h>]], + [[mmap (0, 1, PROT_READ, MAP_ANONYMOUS, -1, 0); return (0);]])], + ac_cv_header_mmap_anon=yes, + ac_cv_header_mmap_anon=no) + AC_LANG_POP([C]) ]) if test "$ac_cv_header_mmap_anon" = yes; then AC_DEFINE([HAVE_MMAP_ANONYMOUS],[],[Define if mmap() uses MAP_ANONYMOUS to map anonymous pages, or undefine if it uses MAP_ANON]) fi ]) - - |