MySQL Bugs: #88902: Warning: _GNU

Bug #88902	Warning: _GNU_SOURCE redefined
Submitted:	13 Dec 2017 14:56	Modified:	14 Dec 2017 14:08
Reporter:	Norvald Ryeng	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Compiling	Severity:	S3 (Non-critical)
Version:	8.0.4	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
When building MySQL with GCC on Linux, there is only one warning:

~/mysql/trunk/bld/mysql-test$ ninja -C ..
ninja: Entering directory `..'
[61/3032] Building C object extra/libevent/CMakeFiles/event.dir/buffer.c.o
../extra/libevent/buffer.c:39:0: warning: "_GNU_SOURCE" redefined
 #define _GNU_SOURCE
 
<command-line>:0:0: note: this is the location of the previous definition

How to repeat:
Build MySQL.

Suggested fix:
Don't redefine _GNU_SOURCE in extra/libevent/buffer.c.

This seems to already have been fixed upstream: https://github.com/libevent/libevent/blob/master/evconfig-private.h.in#L11

Posted by developer:
 
Fixed in 8.0.5, 9.0.0.

Code cleanup. No changelog entry needed.