-#serial 3
+# realloc.m4 serial 11
+dnl Copyright (C) 2007, 2009-2011 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.
-dnl From Jim Meyering.
-dnl Determine whether realloc works when both arguments are 0.
-dnl If it doesn't, arrange to use the replacement function.
-dnl
-
-AC_DEFUN(jm_FUNC_REALLOC,
+# gl_FUNC_REALLOC_GNU
+# -------------------
+# Test whether 'realloc (0, 0)' is handled like in GNU libc, and replace
+# realloc if it is not.
+AC_DEFUN([gl_FUNC_REALLOC_GNU],
[
- dnl xmalloc.c requires that this symbol be defined so it doesn't
- dnl mistakenly use a broken realloc -- as it might if this test were omitted.
- AC_DEFINE_UNQUOTED(HAVE_DONE_WORKING_REALLOC_CHECK, 1,
- [Define if the realloc check has been performed. ])
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ dnl _AC_FUNC_REALLOC_IF is defined in Autoconf.
+ _AC_FUNC_REALLOC_IF(
+ [AC_DEFINE([HAVE_REALLOC_GNU], [1],
+ [Define to 1 if your system has a GNU libc compatible 'realloc'
+ function, and to 0 otherwise.])],
+ [AC_DEFINE([HAVE_REALLOC_GNU], [0])
+ gl_REPLACE_REALLOC
+ ])
+])# gl_FUNC_REALLOC_GNU
- AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
- [AC_TRY_RUN([
- char *realloc ();
- int
- main ()
- {
- exit (realloc (0, 0) ? 0 : 1);
- }
- ],
- jm_cv_func_working_realloc=yes,
- jm_cv_func_working_realloc=no,
- dnl When crosscompiling, assume realloc is broken.
- jm_cv_func_working_realloc=no)
- ])
- if test $jm_cv_func_working_realloc = no; then
- AC_SUBST(LIBOBJS)
- LIBOBJS="$LIBOBJS realloc.$ac_objext"
- AC_DEFINE_UNQUOTED(realloc, rpl_realloc,
- [Define to rpl_realloc if the replacement function should be used.])
+# gl_FUNC_REALLOC_POSIX
+# ---------------------
+# Test whether 'realloc' is POSIX compliant (sets errno to ENOMEM when it
+# fails), and replace realloc if it is not.
+AC_DEFUN([gl_FUNC_REALLOC_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_REALLOC_POSIX], [1],
+ [Define if the 'realloc' function is POSIX compliant.])
+ else
+ gl_REPLACE_REALLOC
fi
])
+
+AC_DEFUN([gl_REPLACE_REALLOC],
+[
+ AC_LIBOBJ([realloc])
+ REPLACE_REALLOC=1
+])