Disable warnings with a pragma (g++)

Kikazaru · 06-29-2006, 11:56 PM

Is it possible to disable all warnings, or indeed any warnings, using a compiler pragma that overrides -Wall?

I saw syntax for some C++ compiler (maybe not g++) that lets you disable warnings selectively by number, but I couldn't find a list of numbers for the warnings.

Thanks!

taylor_venable · 07-01-2006, 07:25 PM

I don't see any #pragma options that enable this effect, but you can use the GCC function attribute "unused" to accomplish the same thing. The downside is you need to set it for each function for which you want to disable warnings. The GCC Manual for version 3.3.6 mentions that it won't work for C++; the manuals for later versions do not make such a mention. Here's the relevant section in the manual [gcc.gnu.org] for the latest stable version.

Kikazaru · 07-01-2006, 07:57 PM

Wow, that's interesting. I didn't realize there were so many possible function attributes...

I suppose the unused attribute could work for me, but I have a few source files with hundreds of functions in them. I don't fancy dealing with them all individually.

Thanks for the suggestion.

taylor_venable · 07-01-2006, 09:58 PM

Quote:

Originally Posted by Kikazaru

I suppose the unused attribute could work for me, but I have a few source files with hundreds of functions in them. I don't fancy dealing with them all individually.

If you want to set the attribute for all (or nearly all) of your functions in a given file, sed could probably help you there.