akhuang added a comment. This caused a linker error in chromium:
ld.lld: error: undefined symbol: __warn_memset_zero_len Apparently now that the glibc memset is being used, __warn_memset_zero_len gets called from libc++ code (https://github.com/llvm/llvm-project/blob/b72a8c65e4e34779b6bc9e466203f553f5294486/libcxx/include/__bit_reference#L371). A repro: $ cat t.cpp #include <bitset> void useit(std::bitset<3> &it); std::bitset<3> getit(); int main() { std::bitset<3> bits = getit(); bits.set(); useit(bits); } $ clang -S -O2 t.cpp -o - -stdlib=libc++ -D_FORTIFY_SOURCE=1 | grep warn_mem callq __warn_memset_zero_len Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D71082/new/ https://reviews.llvm.org/D71082 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
