https://bugs.gentoo.org/875116
--- a/configure
+++ b/configure
@@ -10772,6 +10772,7 @@ else
 #endif
 
 #include <stdio.h>
+#include <stdlib.h>
 
 #ifdef RTLD_GLOBAL
 #  define LT_DLGLOBAL		RTLD_GLOBAL
@@ -25362,7 +25363,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-
+#include <stdlib.h>
 #pragma pack(1)
 			struct {
 				char c[3];
@@ -25441,7 +25442,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
-
+#include <stdlib.h>
 #pragma options align=packed
 				struct {
 					char c[3];
@@ -27724,6 +27725,7 @@ _ACEOF
 cat confdefs.h >>conftest.$ac_ext
 cat >>conftest.$ac_ext <<_ACEOF
 /* end confdefs.h.  */
+#include <stdlib.h>
 
 #ifdef USE_PACKED
 # define PACKED __attribute__((packed))