diff options
Diffstat (limited to 'libffi/aclocal.m4')
| -rw-r--r-- | libffi/aclocal.m4 | 105 |
1 files changed, 97 insertions, 8 deletions
diff --git a/libffi/aclocal.m4 b/libffi/aclocal.m4 index 6ee973732a8..7dabcced86d 100644 --- a/libffi/aclocal.m4 +++ b/libffi/aclocal.m4 @@ -1,6 +1,6 @@ -dnl aclocal.m4 generated automatically by aclocal 1.4-p5 +dnl aclocal.m4 generated automatically by aclocal 1.4 -dnl Copyright (C) 1994, 1995-8, 1999, 2001 Free Software Foundation, Inc. +dnl Copyright (C) 1994, 1995-8, 1999 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -20,11 +20,100 @@ AC_DEFUN([AM_PROG_LIBTOOL],) AC_SUBST(LIBTOOL) ]) +# mmap(2) blacklisting. Some platforms provide the mmap library routine +# but don't support all of the features we need from it. +AC_DEFUN([AC_FUNC_MMAP_BLACKLIST], +[if test $ac_cv_header_sys_mman_h != yes \ + || test $ac_cv_func_mmap != yes; then + ac_cv_func_mmap_file=no + ac_cv_func_mmap_dev_zero=no + ac_cv_func_mmap_anon=no +else + AC_CACHE_CHECK([whether read-only mmap of a plain file works], + ac_cv_func_mmap_file, + [# Add a system to this blacklist if + # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a + # memory area containing the same data that you'd get if you applied + # read() to the same fd. The only system known to have a problem here + # is VMS, where text files have record structure. + case "$host_os" in + vms* | ultrix*) + ac_cv_func_mmap_file=no ;; + *) + ac_cv_func_mmap_file=yes;; + esac]) + AC_CACHE_CHECK([whether mmap from /dev/zero works], + ac_cv_func_mmap_dev_zero, + [# Add a system to this blacklist if it has mmap() but /dev/zero + # does not exist, or if mmapping /dev/zero does not give anonymous + # zeroed pages with both the following properties: + # 1. If you map N consecutive pages in with one call, and then + # unmap any subset of those pages, the pages that were not + # explicitly unmapped remain accessible. + # 2. If you map two adjacent blocks of memory and then unmap them + # both at once, they must both go away. + # Systems known to be in this category are Windows (all variants), + # VMS, and Darwin. + case "$host_os" in + vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00) + ac_cv_func_mmap_dev_zero=no ;; + *) + ac_cv_func_mmap_dev_zero=yes;; + esac]) + + # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for. + AC_CACHE_CHECK([for MAP_ANON(YMOUS)], ac_cv_decl_map_anon, + [AC_TRY_COMPILE( +[#include <sys/types.h> +#include <sys/mman.h> +#include <unistd.h> + +#ifndef MAP_ANONYMOUS +#define MAP_ANONYMOUS MAP_ANON +#endif +], +[int n = MAP_ANONYMOUS;], + ac_cv_decl_map_anon=yes, + ac_cv_decl_map_anon=no)]) + + if test $ac_cv_decl_map_anon = no; then + ac_cv_func_mmap_anon=no + else + AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works], + ac_cv_func_mmap_anon, + [# Add a system to this blacklist if it has mmap() and MAP_ANON or + # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) + # doesn't give anonymous zeroed pages with the same properties listed + # above for use of /dev/zero. + # Systems known to be in this category are Windows, VMS, and SCO Unix. + case "$host_os" in + vms* | cygwin* | pe | mingw* | sco* | udk* ) + ac_cv_func_mmap_anon=no ;; + *) + ac_cv_func_mmap_anon=yes;; + esac]) + fi +fi + +if test $ac_cv_func_mmap_file = yes; then + AC_DEFINE(HAVE_MMAP_FILE, 1, + [Define if read-only mmap of a plain file works.]) +fi +if test $ac_cv_func_mmap_dev_zero = yes; then + AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1, + [Define if mmap of /dev/zero works.]) +fi +if test $ac_cv_func_mmap_anon = yes; then + AC_DEFINE(HAVE_MMAP_ANON, 1, + [Define if mmap with MAP_ANON(YMOUS) works.]) +fi +]) + sinclude(../config/accross.m4) # Like AC_CONFIG_HEADER, but automatically create stamp file. -AC_DEFUN([AM_CONFIG_HEADER], +AC_DEFUN(AM_CONFIG_HEADER, [AC_PREREQ([2.12]) AC_CONFIG_HEADER([$1]) dnl When config.status generates a header, we must update the stamp-h file. @@ -54,7 +143,7 @@ changequote([,]))]) dnl Usage: dnl AM_INIT_AUTOMAKE(package,version, [no-define]) -AC_DEFUN([AM_INIT_AUTOMAKE], +AC_DEFUN(AM_INIT_AUTOMAKE, [AC_REQUIRE([AC_PROG_INSTALL]) PACKAGE=[$1] AC_SUBST(PACKAGE) @@ -82,7 +171,7 @@ AC_REQUIRE([AC_PROG_MAKE_SET])]) # Check to make sure that the build environment is sane. # -AC_DEFUN([AM_SANITY_CHECK], +AC_DEFUN(AM_SANITY_CHECK, [AC_MSG_CHECKING([whether build environment is sane]) # Just in case sleep 1 @@ -123,7 +212,7 @@ AC_MSG_RESULT(yes)]) dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY) dnl The program must properly implement --version. -AC_DEFUN([AM_MISSING_PROG], +AC_DEFUN(AM_MISSING_PROG, [AC_MSG_CHECKING(for working $2) # Run test in a subshell; some versions of sh will print an error if # an executable is not found, even if stderr is redirected. @@ -142,7 +231,7 @@ AC_SUBST($1)]) # serial 1 -AC_DEFUN([AM_MAINTAINER_MODE], +AC_DEFUN(AM_MAINTAINER_MODE, [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles]) dnl maintainer-mode is disabled by default AC_ARG_ENABLE(maintainer-mode, @@ -159,7 +248,7 @@ AC_DEFUN([AM_MAINTAINER_MODE], # Define a conditional. -AC_DEFUN([AM_CONDITIONAL], +AC_DEFUN(AM_CONDITIONAL, [AC_SUBST($1_TRUE) AC_SUBST($1_FALSE) if $2; then |