Hi! The -Wzero-as-null-pointer-constant warning seems to have special handling in manywarnings. I'm not sure how to best deal with the situation below? It seems somehow manywarnings.m4 is adding -Wzero-as-null-pointer-constant even though it shouldn't, for this particular (mingw-cross-)compiler? The -Werror part is just exposing the problem, I don't think -Wzero-as-null-pointer-constant should be added in this situation in the first place?
cc1: error: command-line option '-Wzero-as-null-pointer-constant' is valid for C++/ObjC++ but not for C [-Werror] https://gitlab.com/libidn/libidn/-/jobs/17647596942 The compiler is x86_64-w64-mingw32-gcc from Debian 13 trixie mingw-w64. /Simon
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