Aleksandr Mezin 2b9bf7b162 gmacros.h: use g_macro__has_attribute() where possible
Fall back to compiler version checks only when `__has_attribute()` is not
available.

clang-cl doesn't define `__GNU__`, but still accepts attributes. This change
gets rid of a lot of warnings when building GLib with clang-cl. For GCC and
non-cl Clang nothing should change.
2021-04-16 14:45:03 +06:00
..
2021-01-20 16:05:36 +01:00