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cmacrosfeature-detectionc11static-assert

How to detect if a compiler supports static_assert?

I want to detect, in source file, if the compiler used supports static_assert.

Solution

  • In c11, static_assert is an assert.h macro that expands to _Static_assert.

    You can just use:

    #include <assert.h>

#if defined(static_assert)
// static_assert macro is defined
#endif

    Note that some compilers (e.g., IAR) also have a static_assert keyword extension even if they don't support C11.

    As mentioned in the comments you can also check for c11:

    #if (__STDC_VERSION >= 201112L)
// it is c11, static_assert is defined when assert.h is included
#endif