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-rw-r--r--include/features.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/features.h b/include/features.h
index 75237a7..c3ed81f 100644
--- a/include/features.h
+++ b/include/features.h
@@ -140,8 +140,11 @@
#endif
/* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
- _DEFAULT_SOURCE. */
-#if defined _BSD_SOURCE || defined _SVID_SOURCE
+ _DEFAULT_SOURCE. If _DEFAULT_SOURCE is present we do not
+ issue a warning; the expectation is that the source is being
+ transitioned to use the new macro. */
+#if (defined _BSD_SOURCE || defined _SVID_SOURCE) \
+ && !defined _DEFAULT_SOURCE
# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
# undef _DEFAULT_SOURCE
# define _DEFAULT_SOURCE 1