GCC version 4.6.0 Experimental Release SVN rev. 165913, 2010.10.25 (Status: . Stage 1, open for development) () ();
mingw runtime version 3.18.20100925; w32api version 3.15.20100925; gmp-4.3.2; mpfr-3.0.0-p7; ppl-0.10.2; cloog-ppl-0.15.10; libelf-0.8.13; Binutils 2.20.51.20101025; zlib-1.2.5; mpc-0.8.2; mingw-w64 (svn rev.3735 20101019),
pthreads 2.9.0.0 (static).

GCC configured with:

$ gcc -v

Using built-in specs.

COLLECT_GCC=e:\mingw_msys\msys.46\mingw\bin\gcc.exe

COLLECT_LTO_WRAPPER=e:/mingw_msys/msys.46/mingw/bin/../libexec/gcc/i686-pc-mingw32/4.6.0/lto-wrapper.exe

Target: i686-pc-mingw32

Configured with: ../src/configure --prefix=/mingw_new --build=i686-pc-mingw32 --target=i686-pc-mingw32 --with-sysroot=/mingw_new --with-build-sysroot=/mingw_new --with-libelf=/mingw_new/build_libs --with-mpfr=/mingw_new/build_libs --with-gmp=/mingw_new/build_libs --with-ppl=/mingw_new/build_libs --with-cloog=/mingw_new/build_libs --with-mpc=/mingw_new/build_libs --with-host-libstdcxx='-lstdc++ -lsupc++' --with-pkgversion='XvidVideo.RU - GCC 4.6.0 x86' --with-system-zlib --enable-static --enable-threads=win32 --enable-languages=c,c++,fortran,objc,obj-c++ --enable-targets=all --enable-fully-dynamic-string --enable-version-specific-runtime-libs --enable-lto --disable-debug --disable-rpath --disable-shared --disable-win32-registry --disable-bootstrap --disable-nls

Thread model: win32

gcc version 4.6.0 20101025 (experimental) (XvidVideo.RU - GCC 4.6.0 x86)

$ x86_64-w64-mingw32-gcc -v

Using built-in specs.

COLLECT_GCC=e:\mingw_msys\msys.46\mingw\bin\x86_64-w64-mingw32-gcc.exe

COLLECT_LTO_WRAPPER=e:/mingw_msys/msys.46/mingw/bin/../libexec/gcc/x86_64-w64-mingw32/4.6.0/lto-wrapper.exe

Target: x86_64-w64-mingw32

Configured with: ../src/configure --prefix=/mingw_new --build=i686-pc-mingw32 --target=x86_64-w64-mingw32 --with-libelf=/mingw_new/build_libs --with-mpfr=/mingw_new/build_libs --with-gmp=/mingw_new/build_libs --with-ppl=/mingw_new/build_libs --with-cloog=/mingw_new/build_libs --with-mpc=/mingw_new/build_libs --with-sysroot=/mingw_new --with-build-sysroot=/mingw_new --with-host-libstdcxx='-lstdc++ -lsupc++' --with-pkgversion='XvidVideo.RU - GCC 4.6.0 x64' --with-system-zlib --enable-static --enable-threads=win32 --enable-languages=c,c++,fortran,objc,obj-c++ --enable-targets=all --enable-fully-dynamic-string --enable-version-specific-runtime-libs --enable-leading-mingw64-underscores --enable-lto --disable-rpath --disable-shared --disable-win32-registry --disable-bootstrap --disable-debug --disable-nls

Thread model: win32

gcc version 4.6.0 20101025 (experimental) (XvidVideo.RU - GCC 4.6.0 x64)

-mcygwin -mno-cygwin, these keys are deleted and not used in gcc 4.6.0.