[Bug c/67115] [MinGW64] name conflict with system headers (identifier "CONST")
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67115 --- Comment #2 from Cezary Śliwa --- It may be because they follow the OS specific standards, so to say.
[Bug c/67115] [MinGW64] name conflict with system headers (identifier "CONST")
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67115 --- Comment #1 from Jonathan Wakely --- Why do mingw system headers use non-reserved names?