support _BSD_SOURCE feature test macro

[musl] / include / ctype.h

diff --git a/include/ctype.h b/include/ctype.h
index a605d08..8ceaa9f 100644 (file)
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -1,6 +1,10 @@
 #ifndef        _CTYPE_H
 #define        _CTYPE_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int   isalnum(int);
 int   isalpha(int);
 int   isblank(int);
@@ -26,7 +30,8 @@ int   toupper(int);
 
 
 #if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
- || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
+ || defined(_BSD_SOURCE)
 
 #define __NEED_locale_t
 #include <bits/alltypes.h>
@@ -53,4 +58,8 @@ int   toascii(int);
 
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif