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log2(_A1 __lcpp_x) _NOEXCEPT {return ::log2((double)__lcpp_x);}
^
../.././gcc/gcc/config/riscv/genrvv-type-indexer.cc:120:30: error: no member named 'log2' in namespace 'std'; did you mean simply 'log2'?
    elmul_log2 = lmul_log2 + std::log2 (eew / sew);
                             ^~~~~~~~~
                             log2
/Library/Developer/CommandLineTools/SDKs/MacOSX12.sdk/usr/include/c++/v1/math.h:1463:1: note: 'log2' declared here
log2(_A1 __lcpp_x) _NOEXCEPT {return ::log2((double)__lcpp_x);}
^
2 errors generated.
make[2]: *** [build/genrvv-type-indexer.o] Error 1
make[2]: *** Waiting for unfinished jobs....
rm fsf-funding.pod gpl.pod cpp.pod gcov-dump.pod gfdl.pod gcc.pod gcov.pod lto-dump.pod gcov-tool.pod
make[1]: *** [all-gcc] Error 2
make: *** [stamps/build-gcc-newlib-stage1] Error 2