fix definition of CMPLX macros in complex.h to work in constant expressions

[musl] / include / string.h

diff --git a/include/string.h b/include/string.h
index d441233..ff9badb 100644 (file)
--- a/include/string.h
+++ b/include/string.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
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \