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- dnl Copyright (C) 2007, 2009-2014 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.
- m4_version_prereq([2.70], [] ,[
- AC_DEFUN([_AC_FUNC_MALLOC_IF],
- [
- AC_REQUIRE([AC_HEADER_STDC])dnl
- AC_REQUIRE([AC_CANONICAL_HOST])dnl for cross-compiles
- AC_CHECK_HEADERS([stdlib.h])
- AC_CACHE_CHECK([for GNU libc compatible malloc],
- [ac_cv_func_malloc_0_nonnull],
- [AC_RUN_IFELSE(
- [AC_LANG_PROGRAM(
- [[
-
-
- char *malloc ();
-
- ]],
- [[return ! malloc (0);]])
- ],
- [ac_cv_func_malloc_0_nonnull=yes],
- [ac_cv_func_malloc_0_nonnull=no],
- [case "$host_os" in
-
- *-gnu* | freebsd* | netbsd* | openbsd* \
- | hpux* | solaris* | cygwin* | mingw*)
- ac_cv_func_malloc_0_nonnull=yes ;;
-
- *) ac_cv_func_malloc_0_nonnull=no ;;
- esac
- ])
- ])
- AS_IF([test $ac_cv_func_malloc_0_nonnull = yes], [$1], [$2])
- ])
- ])
- AC_DEFUN([gl_FUNC_MALLOC_GNU],
- [
- AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
- dnl _AC_FUNC_MALLOC_IF is defined in Autoconf.
- _AC_FUNC_MALLOC_IF(
- [AC_DEFINE([HAVE_MALLOC_GNU], [1],
- [Define to 1 if your system has a GNU libc compatible 'malloc'
- function, and to 0 otherwise.])],
- [AC_DEFINE([HAVE_MALLOC_GNU], [0])
- REPLACE_MALLOC=1
- ])
- ])
- AC_DEFUN([gl_FUNC_MALLOC_POSIX],
- [
- AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
- AC_REQUIRE([gl_CHECK_MALLOC_POSIX])
- if test $gl_cv_func_malloc_posix = yes; then
- AC_DEFINE([HAVE_MALLOC_POSIX], [1],
- [Define if the 'malloc' function is POSIX compliant.])
- else
- REPLACE_MALLOC=1
- fi
- ])
- AC_DEFUN([gl_CHECK_MALLOC_POSIX],
- [
- AC_CACHE_CHECK([whether malloc, realloc, calloc are POSIX compliant],
- [gl_cv_func_malloc_posix],
- [
- dnl It is too dangerous to try to allocate a large amount of memory:
- dnl some systems go to their knees when you do that. So assume that
- dnl all Unix implementations of the function are POSIX compliant.
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[]],
- [[
- choke me
-
- ]])],
- [gl_cv_func_malloc_posix=yes],
- [gl_cv_func_malloc_posix=no])
- ])
- ])
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