avoid breakage if somebody wrongly defines empty feature test macros

2012-11-01 03:49:43 -04:00
parent 18c0e02e2b
commit b367ab15fa
2 changed files with 3 additions and 3 deletions
@@ -149,7 +149,7 @@ void swab(const void *__restrict, void *__restrict, ssize_t);
 #endif

 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) \
- || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE < 700)
+ || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
 int usleep(unsigned);
 unsigned ualarm(unsigned, unsigned);
 #endif