------- Comment #6 from aflyhorse at foxmail dot com 2010-03-22 01:00 ------- In my recent build I configured the binutils as: ../src/configure --target=x86_64-w64-mingw32 --enable-targets=x86_64-w64-mingw32,i686-w64-mingw32 --disable-shared --enable-static --disable-nls --with-mpc=/local --with-gmp=/local --with-mpfr=/local --with-ppl=/local --with-cloog=/local --prefix=/mingw64 --with-sysroot=/mingw64 CFLAGS="-O3 -fomit-frame-pointer -pipe -march=k8 -mfpmath=sse -mmmx -m3dnow -m64 -Wa,-march=k8" LDFLAGS="-s -Wl,--as-needed"
and the gcc as: ../src/configure --target=x86_64-w64-mingw32 --enable-targets=all --enable-multilib --enable-64bit --prefix=/mingw64 --with-sysroot=/mingw64 --disable-shared --enable-static --disable-nls --enable-version-specific-runtime-libs --with-dwarf --with-mpc=/local --with-mpfr=/local --with-gmp=/local --with-ppl=/local --with-cloog=/local --enable-fully-dynamic-string --enable-languages=c,c++,fortran,java --disable-libgomp --enable-libjava-multilib --with-host-libstdcxx='-lstdc++ -lsupc++' --with-pkgversion='LunarShaddow - for my Helen' CFLAGS='-O3 -fomit-frame-pointer -pipe -march=k8 -mfpmath=sse -mmmx -m3dnow -Wa,-march=k8' LDFLAGS='-s -Wl,--as-needed' Just omit the optimization options and you'll find the use of prefix and sysroot. ensure that you use the same sysroot while building binutils. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42886
