diff options
Diffstat (limited to 'gl/m4/realloc.m4')
| -rw-r--r-- | gl/m4/realloc.m4 | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/gl/m4/realloc.m4 b/gl/m4/realloc.m4 index 039ed192a6..954c2f0e58 100644 --- a/gl/m4/realloc.m4 +++ b/gl/m4/realloc.m4 @@ -1,9 +1,47 @@ -# realloc.m4 serial 12 +# realloc.m4 serial 13 dnl Copyright (C) 2007, 2009-2012 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], [] ,[ + +# This is taken from the following Autoconf patch: +# http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=7fbb553727ed7e0e689a17594b58559ecf3ea6e9 +AC_DEFUN([_AC_FUNC_REALLOC_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 realloc], + [ac_cv_func_realloc_0_nonnull], + [AC_RUN_IFELSE( + [AC_LANG_PROGRAM( + [[#if defined STDC_HEADERS || defined HAVE_STDLIB_H + # include <stdlib.h> + #else + char *realloc (); + #endif + ]], + [[return ! realloc (0, 0);]]) + ], + [ac_cv_func_realloc_0_nonnull=yes], + [ac_cv_func_realloc_0_nonnull=no], + [case "$host_os" in + # Guess yes on platforms where we know the result. + *-gnu* | freebsd* | netbsd* | openbsd* \ + | hpux* | solaris* | cygwin* | mingw*) + ac_cv_func_realloc_0_nonnull=yes ;; + # If we don't know, assume the worst. + *) ac_cv_func_realloc_0_nonnull=no ;; + esac + ]) + ]) + AS_IF([test $ac_cv_func_realloc_0_nonnull = yes], [$1], [$2]) +])# AC_FUNC_REALLOC + +]) + # gl_FUNC_REALLOC_GNU # ------------------- # Test whether 'realloc (0, 0)' is handled like in GNU libc, and replace |