Define _GNU_SOURCE properly, other header fixes

This lets -std=c89 build for gcc 8.4.0

1 files changed, 2 insertions, 2 deletions

diff --git a/dbmalloc.h b/dbmalloc.h
index d5e814e..e5554e8 100644
--- a/dbmalloc.h
+++ b/dbmalloc.h
@@ -1,9 +1,9 @@
 #ifndef DBMALLOC_H_
 #define DBMALLOC_H_
 
-#include "stdint.h"
-#include "stdlib.h"
 #include "options.h"
+#include <stdint.h>
+#include <stdlib.h>
 
 void * m_malloc(size_t size);
 void * m_calloc(size_t nmemb, size_t size);