On Wed, Apr 24, 2024 at 3:40 AM Jon Chesterfield <
jonathanchesterfield@gmail.com> wrote:

> Re testing GNUC,
>
> I'm not sure the macro means "targeting Linux", and it seems totally
> legitimate that a C compiler which doesn't implement any GNU extensions
> would not define that macro. Musl is quite a likely choice for a non-gnu
> compiler that wants to compile code to run against the Linux kernel.
>

__GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__ only means the macros are
defined by GNU compilers that use the C preprocessor. See <
https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html>.

The macros don't mean "targeting Linux". They are also defined on OS X
(Darwin) and Windows.

Jeff