implement legacy function herror

[musl] / include / stdio.h

diff --git a/include/stdio.h b/include/stdio.h
index cd60bb5..884d2e6 100644 (file)
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -21,7 +21,11 @@ extern "C" {
 
 #include <bits/alltypes.h>
 
+#ifdef __cplusplus
 #define NULL 0L
+#else
+#define NULL ((void*)0)
+#endif
 
 #undef EOF
 #define EOF (-1)