在 2020/5/10 12:27, JonY via Gcc-help 写道:
> 
> I think option #3 is the simplest approach in the short term, though I
> prefer option #2.
> 

This patch has been accepted by MSYS2 [1], tested for bootstrapping on
both i686 and x86_64.

So here comes a 4th option: Disable `-Werror` if `--disable-werror` is
specified to the top-level configure.

EGREP'ing for `(format|__format__)\s*\(\s*(__printf__|printf)` in GCC
source reveals ~30 matches (excluding testsuites). Probably they should
all be fixed similarly, or we ignore such warnings for simplicity.
libgomp doesn't build despite `--disable-werror` at top level, which
seems a bug in this case.


[1]
https://github.com/msys2/MINGW-packages/blob/9501ee2afc8d01dc7d85383e4b22e91c30d93ca7/mingw-w64-gcc/0020-libgomp-Don-t-hard-code-MS-printf-attributes.patch


-- 
Best regards,
LH_Mouse