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BZ #16632: Change [_BSD/_SVID]_SOURCE warning.

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Source packages that need to support both 2.19 and
2.20 will need to decide to use _BSD_SOURCE and
_SVID_SOURCE vs. _DEFAULT_SOURCE.

The difficulty in making that decision is that
__GLIBC_MINOR__ is itself defined in features.h,
but you want to set the feature test macros before
including features.h.

Therefore to ease the transition we should disable
the warning if _DEFAULT_SOURCE is also defined.

https://sourceware.org/ml/libc-alpha/2014-02/msg00666.html

https://sourceware.org/glibc/wiki/Release/2.20#Packaging_Changes
This commit is contained in:
Carlos O'Donell
2014-02-25 13:23:25 -05:00
parent d050367659
commit ade40b10ff
3 changed files with 12 additions and 3 deletions
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7
include/features.h
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@@ -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