Apple LLVM 编译器——使用编译指示来禁止对文件的一部分发出所有警告？

Question

I need inhibit warnings for part of one of my source files. This is what I have. It's not working.

 #pragma GCC diagnostic push
 #pragma GCC "-w"  // also tried "-Wall"

     // code that generates warnings here

 #pragma GCC diagnostic pop

Answer 1

You can disable individual warnings using the format:

#pragma GCC diagnostic ignored "-Wwarning-to-disable"

Except, that doesn't work for "-Wall" , only for individual warnings. I would recommend only disabling the particular warning you're experiencing, and only if it's in source files over which you've no control. If it's in your code, you should seriously consider fixing the warnings in the proper way.

Edit: See Section 3.8, Options to Request or Suppress Warnings , in the GCC docs .

Edit 2: Ah, didn't realize that isn't a comprehensive list. There doesn't appear to be any documentation containing a comprehensive list, but you can always check the source. Poking around the clang source, it looks like include/clang/Basic/DiagnosticGroups.td lists a whole bunch of them.

Answer 2

If using XCode, you can go to the build log and expand the compiler output and it will tell you the warning name to use in the pragma