https://bugs.gentoo.org/874420

From bcf98fe9a674a3784ad1a4f8eecc3b31a7b209a9 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Tue, 25 Oct 2022 14:00:23 +0100
Subject: [PATCH] Fix malloc detection

--- a/m4/getline.m4
+++ b/m4/getline.m4
@@ -18,6 +18,7 @@ AC_DEFUN([AM_FUNC_GETLINE],
 #    include <stdio.h>
 #    include <sys/types.h>
 #    include <string.h>
+#    include <stdlib.h>
     int main ()
     { /* Based on a test program from Karl Heuer.  */
       char *line = NULL;
--- a/m4/malloc.m4
+++ b/m4/malloc.m4
@@ -14,6 +14,7 @@ AC_DEFUN([jm_FUNC_MALLOC],
 
  AC_CACHE_CHECK([for working malloc], jm_cv_func_working_malloc,
   [AC_TRY_RUN([
+    #include <stdlib.h>
     char *malloc ();
     int
     main ()
--- a/m4/realloc.m4
+++ b/m4/realloc.m4
@@ -14,7 +14,8 @@ AC_DEFUN([jm_FUNC_REALLOC],
 
  AC_CACHE_CHECK([for working realloc], jm_cv_func_working_realloc,
   [AC_TRY_RUN([
-    char *realloc ();
+    #include <stdlib.h>
+    void *realloc(void *ptr, size_t size);
     int
     main ()
     {