-#serial 1
-
-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
-dnl If you use this macro in a package, you should
-dnl add the following two lines to acconfig.h:
-dnl /* Define to rpl_realloc if the replacement function should be used. */
-dnl #undef realloc
-dnl
-
-AC_DEFUN([jm_FUNC_REALLOC],
-[
- if test x = y; then
- dnl This code is deliberately never run via ./configure.
- dnl FIXME: this is a gross hack to make autoheader put an entry
- dnl for this symbol in config.h.in.
- AC_CHECK_FUNCS(DONE_WORKING_REALLOC_CHECK)
- fi
- 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(HAVE_DONE_WORKING_REALLOC_CHECK, 1, [Needed for xmalloc.c])
-
- AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
- [AC_RUN_IFELSE([AC_LANG_SOURCE([
- char *realloc ();
- int
- main ()
- {
- exit (realloc (0, 0) ? 0 : 1);
- }
- ])],
- [jm_cv_func_working_realloc=yes],
- [jm_cv_func_working_realloc=no],
- [When crosscompiling])
- ])
- if test $jm_cv_func_working_realloc = no; then
- AC_LIBOBJ([realloc])
- AC_DEFINE(realloc, rpl_realloc, [Replacement realloc()])
- fi
-])