How to disable warnings for particular include files?

Question

I wold like to disable particular warnings for all files that are included, directly or indirectly, by particular include files. For example, I want to disable the warning "you are assigning a string literal to a char*", for all files or files included by files included by a #include <bar/*> (the star in my case means "anything may be here").

The reason is, some of the people I have to program with just can't use "const", so in the end I get lots of warnings about that particular string literal abuse. I would like to ignore those thousands of warnings coming from their code, so I can concentrate on the mistakes in my own code and fix them.

I use Intel C++ and GCC. Some of my buddies use clang, so I would be glad to hear solutions for that too.

Answer 1

When using GCC you can use the -isystem flag instead of the -I flag to disable warnings from that location.

So if you’re currently using

gcc -Iparent/path/of/bar … 

use

gcc -isystem parent/path/of/bar … 

instead. Unfortunately, this isn’t a particularly fine-grained control. I’m not aware of a more targeted mechanism.

Answer 2

A better GCC solution: use #pragma.

#pragma GCC diagnostic push  #pragma GCC diagnostic ignored "-W<evil-option>" #include <evil_file> #pragma GCC diagnostic pop 

for example:

#pragma GCC diagnostic push  #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include <QtXmlPatterns> #pragma GCC diagnostic pop