Add support for static assertions (on compilers that support them)

This introduces the macro `STATIC_ASSERT(ex, msg)`, that works like its
C11 counterpart `_Static_assert(ex, msg)`, on compilers that support it.

Support is provided, depending on the compiler:
- When in C11 mode, use the native `_Static_assert`
- If the compiler advertises having the `c_static_assert` feature, use
  `_Static_assert` (according to the clang documentation).
- If the compiler is GCC >= 4.7 (tested to be compatible), use
  `_Static_assert` (nonstandard extension, C11 feature available in C99).
- If the compiler is MSVC (all the currently supported versions have
  been tested to be compatible), then use `static_assert` (nonstandard
  extension, C++ feature)
- Otherwise, define it as a no-op macro.

Signed-off-by: Haru <haru@dotalux.com>

0 files changed, 0 insertions, 0 deletions