--- a/dist/configure	2010-04-12 13:25:23.000000000 -0700
+++ b/dist/configure	2021-04-11 11:27:32.000000000 -0700
@@ -19158,7 +19158,7 @@
 	# x86_64/gcc: FreeBSD, NetBSD, BSD/OS, Linux
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-
+#include <stdlib.h>
 int
 main ()
 {
@@ -20197,7 +20197,7 @@
 if test "$db_cv_atomic" = no; then
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
-
+#include <stdlib.h>
 int
 main ()
 {
--- a/dbinc/atomic.h	2013-03-12 14:07:22.000000000 -0400
+++ b/dbinc/atomic.h	2013-03-12 14:06:35.000000000 -0400
@@ -144,7 +144,7 @@
 #define	atomic_inc(env, p)	__atomic_inc(p)
 #define	atomic_dec(env, p)	__atomic_dec(p)
 #define	atomic_compare_exchange(env, p, o, n)	\
-	__atomic_compare_exchange((p), (o), (n))
+	__atomic_compare_exchange_db((p), (o), (n))
 static inline int __atomic_inc(db_atomic_t *p)
 {
 	int	temp;
@@ -176,7 +176,7 @@
  * http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
  * which configure could be changed to use.
  */
-static inline int __atomic_compare_exchange(
+static inline int __atomic_compare_exchange_db(
 	db_atomic_t *p, atomic_value_t oldval, atomic_value_t newval)
 {
 	atomic_value_t was;