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CC=clang CXX=clang++ CFLAGS="-march=native -O2 -pipe -flto=5 -fvectorize" CXXFLAGS="${CFLAGS}" LDFLAGS="${CFLAGS} -Wl,-plugin,/usr/lib64/LLVMgold.so" AR='/usr/local/bin/clang-ar' RANLIB=':' NM='nm --plugin /usr/lib64/LLVMgold.so'