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Diffstat (limited to 'libsigsegv/m4/mmap-anon.m4')
| -rw-r--r-- | libsigsegv/m4/mmap-anon.m4 | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/libsigsegv/m4/mmap-anon.m4 b/libsigsegv/m4/mmap-anon.m4 deleted file mode 100644 index 9f43ae67..00000000 --- a/libsigsegv/m4/mmap-anon.m4 +++ /dev/null @@ -1,140 +0,0 @@ -# mmap-anon.m4 serial 3 (libsigsegv-2.6) -dnl Copyright (C) 2002-2003, 2008 Bruno Haible <bruno@clisp.org> -dnl This file is free software, distributed under the terms of the GNU -dnl General Public License. As a special exception to the GNU General -dnl Public License, this file may be distributed as part of a program -dnl that contains a configuration script generated by Autoconf, under -dnl the same distribution terms as the rest of that program. - -# How to allocate fresh memory using mmap. -AC_DEFUN([SV_MMAP_ANON], -[ - AC_REQUIRE([AC_PROG_CC]) - AC_REQUIRE([AC_CANONICAL_HOST]) - - dnl 1) MAP_ANON - - AC_CACHE_CHECK([for mmap with MAP_ANON], sv_cv_func_mmap_anon, [ - AC_RUN_IFELSE([ - AC_LANG_SOURCE([[ -#include <sys/types.h> -#include <sys/mman.h> -int main () -{ - void *p = mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); - return (p == (void *)(-1)); -}]])], - [sv_cv_func_mmap_anon=yes], - [sv_cv_func_mmap_anon=no], - [ - dnl FIXME: Put in some more known values here. - case "$host_os" in - freebsd* | linux* | osf* | darwin*) - sv_cv_func_mmap_anon=yes ;; - *) - AC_LINK_IFELSE([ - AC_LANG_PROGRAM([[ -#include <sys/types.h> -#include <sys/mman.h> -]], - [[mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);]])], - [sv_cv_func_mmap_anon="guessing yes"], - [sv_cv_func_mmap_anon=no]) - ;; - esac - ]) - ]) - if test "$sv_cv_func_mmap_anon" != no; then - AC_DEFINE(HAVE_MMAP_ANON, 1, - [Define if <sys/mman.h> defines MAP_ANON and mmaping with MAP_ANON works.]) - fi - - dnl 2) MAP_ANONYMOUS - - AC_CACHE_CHECK([for mmap with MAP_ANONYMOUS], sv_cv_func_mmap_anonymous, [ - AC_RUN_IFELSE([ - AC_LANG_SOURCE([[ -#include <sys/types.h> -#include <sys/mman.h> -int main () -{ - void *p = mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - return (p == (void *)(-1)); -}]])], - [sv_cv_func_mmap_anonymous=yes], - [sv_cv_func_mmap_anonymous=no], - [ - dnl FIXME: Put in some more known values here. - case "$host_os" in - hpux* | linux* | osf*) - sv_cv_func_mmap_anonymous=yes ;; - darwin*) - sv_cv_func_mmap_anonymous=no ;; - *) - AC_LINK_IFELSE([ - AC_LANG_PROGRAM([[ -#include <sys/types.h> -#include <sys/mman.h> -]], - [[mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);]])], - [sv_cv_func_mmap_anonymous="guessing yes"], - [sv_cv_func_mmap_anonymous=no]) - ;; - esac - ]) - ]) - if test "$sv_cv_func_mmap_anonymous" != no; then - AC_DEFINE(HAVE_MMAP_ANONYMOUS, 1, - [Define if <sys/mman.h> defines MAP_ANONYMOUS and mmaping with MAP_ANONYMOUS - works.]) - fi - - dnl 3) MAP_FILE of /dev/zero - - AC_CACHE_CHECK([for mmap of /dev/zero], sv_cv_func_mmap_devzero, [ - AC_RUN_IFELSE([ - AC_LANG_SOURCE([[ -#include <sys/types.h> -#include <sys/mman.h> -#include <fcntl.h> -#ifndef MAP_FILE -#define MAP_FILE 0 -#endif -int main () -{ - int fd; - void *p; - fd = open ("/dev/zero", O_RDONLY, 0666); - if (fd < 0) return 1; - p = mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_FILE | MAP_PRIVATE, fd, 0); - return (p == (void *)(-1)); -}]])], - [sv_cv_func_mmap_devzero=yes], - [sv_cv_func_mmap_devzero=no], - [ - dnl FIXME: Put in some more known values here. - case "$host_os" in - freebsd* | irix* | linux* | osf* | solaris* | sunos4*) - sv_cv_func_mmap_devzero=yes ;; - darwin*) - sv_cv_func_mmap_devzero=no ;; - *) - AC_LINK_IFELSE([ - AC_LANG_PROGRAM([[ -#include <sys/types.h> -#include <sys/mman.h> -#ifndef MAP_FILE -#define MAP_FILE 0 -#endif -]], [[mmap (0, 0x10000, PROT_READ | PROT_WRITE, MAP_FILE | MAP_PRIVATE, 7, 0);]])], - [sv_cv_func_mmap_devzero="guessing yes"], - [sv_cv_func_mmap_devzero=no]) - ;; - esac - ]) - ]) - if test "$sv_cv_func_mmap_devzero" != no; then - AC_DEFINE(HAVE_MMAP_DEVZERO, 1, - [Define if mmaping of the special device /dev/zero works.]) - fi -]) |