| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 1 | # |
| 2 | # Check for anonymous mmap macros. This is modified from |
| 3 | # http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html |
| 4 | # |
| 5 | AC_DEFUN([AC_HEADER_MMAP_ANONYMOUS], |
| 6 | [AC_CACHE_CHECK(for MAP_ANONYMOUS vs. MAP_ANON, |
| 7 | ac_cv_header_mmap_anon, |
| Reid Spencer | 12de17d | 2004-09-19 22:31:49 +0000 | [diff] [blame] | 8 | [ AC_LANG_PUSH([C]) |
| 9 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM( |
| 10 | [[#include <sys/mman.h> |
| 11 | #include <unistd.h> |
| 12 | #include <fcntl.h>]], |
| 13 | [[mmap (0, 1, PROT_READ, MAP_ANONYMOUS, -1, 0); return (0);]])], |
| 14 | ac_cv_header_mmap_anon=yes, |
| 15 | ac_cv_header_mmap_anon=no) |
| 16 | AC_LANG_POP([C]) |
| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 17 | ]) |
| 18 | if test "$ac_cv_header_mmap_anon" = yes; then |
| Reid Spencer | 52f853a | 2004-12-27 03:14:43 +0000 | [diff] [blame] | 19 | AC_DEFINE([HAVE_MMAP_ANONYMOUS],[1],[Define if mmap() uses MAP_ANONYMOUS to map anonymous pages, or undefine if it uses MAP_ANON]) |
| Reid Spencer | 491f681 | 2004-09-07 06:56:14 +0000 | [diff] [blame] | 20 | fi |
| 21 | ]) |