Question

What’s the closest GCC equivalent to this MSVC preprocessor code?

#pragma warning( push )                    // Save the current warning state.
#pragma warning( disable : 4723 )          // C4723: potential divide by 0
// Code which would generate warning 4723.
#pragma warning( pop )                     // Restore warnings to previous state.

We have code in commonly included headers which we do not want to generate a specific warning for. However, we want files which include those headers to continue to generate that warning (if the project has that warning enabled).

Answer 1

Selectively disabling warnings is possible in GCC while the push/pop features are available since version 4.6.

Here’s the example from the documentation:^[*]

#pragma GCC diagnostic error "-Wuninitialized"
    foo(a);         /* error is given for this one */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wuninitialized"
    foo(b);         /* no diagnostic for this one */
#pragma GCC diagnostic pop
    foo(c);         /* error is given for this one */
#pragma GCC diagnostic pop
    foo(d);         /* depends on command line options */

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^[*] The imbalanced pop at the end is documented as well:

If a pop has no matching push, the command-line options are restored.