https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115190
--- Comment #4 from huangqinjin at gmail dot com --- The repro in description shows that MSYS2 gcc read the module mapper early even it is not used, seems to me it doesn't match the document https://gcc.gnu.org/onlinedocs/gcc/C_002b_002b-Module-Mapper.html > The mapper is connected to or loaded lazily, > when the first module mapping is required.
