support _BSD_SOURCE feature test macro

[musl] / include / ctype.h

diff --git a/include/ctype.h b/include/ctype.h
index a85e907..8ceaa9f 100644 (file)
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -30,7 +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>