tags:

views:

678

answers:

3
Q: 

Which gcc switch disables "left-hand operand of comma has no effect" warning?

It's a part of larger code base, which forces -Werror on gcc. This warning is generated in a third party code that shouldn't be changed (and I actually know how to fix it), but I can disable specific warnings. This time man gcc failed me, so please, let some gcc master enlighten me. TIA.

+6  A: 

It is the -Wno-unused-value option, see the documentation

Florian Bösch  2008-09-21 17:16:43
That made it, thank you! To be literal it's Wno-unused-value though.
phjr  2008-09-21 17:23:09
A: 

Have you tried using a diagnostic pragma directive? These are available in gcc 4.2.1+, I believe.

Tyler  2008-09-21 17:18:31
That would have the same effect, but I can't edit the files. Thanks anyway, I may need that later.
phjr  2008-09-21 17:23:42
+5  A: 

If you use -fdiagnostics-show-option, GCC will tell you how to disable a warning (if possible).

JesperE  2008-09-21 18:41:15
Wow, yet another thing I didn't know. Thanks!
phjr  2008-09-21 19:47:43

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