add support for BSD struct tcphdr in netinet/tcp.h

[musl] / include / stdlib.h

diff --git a/include/stdlib.h b/include/stdlib.h
index 2bd5f10..1e67b89 100644 (file)
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -7,7 +7,11 @@ extern "C" {
 
 #include <features.h>
 
+#ifdef __cplusplus
 #define NULL 0L
+#else
+#define NULL ((void*)0)
+#endif
 
 #define __NEED_size_t
 #define __NEED_wchar_t