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authorRich Felker <dalias@aerifal.cx>2012-11-01 03:49:43 -0400
committerRich Felker <dalias@aerifal.cx>2012-11-01 03:49:43 -0400
commitb367ab15fa68a59c8532f8d06f5d1b01aa5a5c7a (patch)
tree5702849fd96c2e1736f2ae7c43c1cf8551affca0 /include/unistd.h
parent18c0e02e2bd53ceedbb843b06ff90890f1c734b0 (diff)
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avoid breakage if somebody wrongly defines empty feature test macros
Diffstat (limited to 'include/unistd.h')
-rw-r--r--include/unistd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/unistd.h b/include/unistd.h
index 9ac4765a..bb741e4b 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -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