[lttng-dev] [PATCH] urcu: fix deprecation warning with new glibc

[mathieu.desnoyers@efficios.com (Mathieu Desnoyers)]

----- On Jun 1, 2015, at 5:16 PM, Marc Kleine-Budde mkl at pengutronix.de wrote:

> On 06/01/2015 04:25 PM, Mathieu Desnoyers wrote:
>> ----- On Jun 1, 2015, at 3:16 PM, Marc Kleine-Budde mkl at pengutronix.de wrote:
>> 
>>> This patch fixes the following warning:
>>>
>>> /usr/include/features.h:148:3: warning: #warning "_BSD_SOURCE and _SVID_SOURCE
>>> are deprecated, use _DEFAULT_SOURCE" [-Wcpp]
>>> # warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
>> 
>> And why does this patch just add _DEFAULT_SOURCE without removing _BSD_SOURCE ?
>> Is it the intended transition path ? Is it documented somewhere ?
> 
> From http://man7.org/linux/man-pages/man7/feature_test_macros.7.html:
> 
> _BSD_SOURCE (deprecated since glibc 2.20)
> [...]
> Since glibc 2.20, this macro is deprecated.  It now has the
>              same effect as defining _DEFAULT_SOURCE, but generates a com?
>              pile-time warning (unless _DEFAULT_SOURCE is also defined).
>              Use _DEFAULT_SOURCE instead.  To allow code that requires
>              _BSD_SOURCE in glibc 2.19 and earlier and _DEFAULT_SOURCE in
>              glibc 2.20 and later to compile without warnings, define both
>              _BSD_SOURCE and _DEFAULT_SOURCE.

Cool, thanks for the patch!

Mathieu

> 
> Marc
> 
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com