configure-only as cannot regenerate with new autotools :(
--- a/configure
+++ b/configure
@@ -7486,6 +7486,7 @@ else
 #line 7486 "configure"
 #include "confdefs.h"
 #include <ctype.h>
+#include <stdlib.h>
 #if ((' ' & 0x0FF) == 0x020)
 # define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
@@ -9698,6 +9699,7 @@ else
 #line 9698 "configure"
 #include "confdefs.h"
 #include <ctype.h>
+#include <stdlib.h>
 #if ((' ' & 0x0FF) == 0x020)
 # define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 # define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
--- a/configure
+++ b/configure
@@ -2279,6 +2279,7 @@ rm -f conftest.$ac_objext conftest.$ac_ext
   cat >conftest.$ac_ext <<_ACEOF
 #line 2280 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 $ac_declaration
 int
 main ()
@@ -3088,6 +3089,7 @@ else
 #include "confdefs.h"
 
 	#include <stdio.h>
+	#include <stdlib.h>
 	#include <sys/types.h>
 	#include <unistd.h>
 
@@ -6541,6 +6543,7 @@ else
 #endif
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef RTLD_GLOBAL
 #  define LT_DLGLOBAL		RTLD_GLOBAL
@@ -6638,6 +6641,7 @@ else
 #endif
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef RTLD_GLOBAL
 #  define LT_DLGLOBAL		RTLD_GLOBAL
@@ -8165,6 +8169,7 @@ else
   cat >conftest.$ac_ext <<_ACEOF
 #line 8165 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 int
 find_stack_direction ()
 {
@@ -8368,6 +8373,7 @@ $ac_includes_default
 
 #include <fcntl.h>
 #include <sys/mman.h>
+#include <stdlib.h>
 
 #if !STDC_HEADERS && !HAVE_STDLIB_H
 char *malloc ();
@@ -9957,6 +9963,7 @@ else
   cat >conftest.$ac_ext <<_ACEOF
 #line 9956 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 int
 main ()
 {
@@ -10438,6 +10445,7 @@ else
   cat >conftest.$ac_ext <<_ACEOF
 #line 10437 "configure"
 #include "confdefs.h"
+#include <stdlib.h>
 int
 find_stack_direction ()
 {
@@ -10745,6 +10753,7 @@ $ac_includes_default
 
 #include <fcntl.h>
 #include <sys/mman.h>
+#include <stdlib.h>
 
 #if !STDC_HEADERS && !HAVE_STDLIB_H
 char *malloc ();