--- /dev/null
+#serial 1
+
+dnl From Jim Meyering.
+dnl Determine whether realloc accepts 0 as its first argument.
+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,
+[
+ AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
+ [AC_TRY_RUN([
+ char *realloc ();
+ int
+ main ()
+ {
+ exit (realloc (0, 1) ? 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 $jm_cv_func_working_realloc = no; then
+ LIBOBJS="$LIBOBJS realloc.o"
+ AC_DEFINE_UNQUOTED(realloc, rpl_realloc)
+ fi
+])