$ g++ -v
Using built-in specs.
COLLECT_GCC=d:\Tools\MinGW\4.9.2\x64\bin\g++.exe
COLLECT_LTO_WRAPPER=d:/Tools/MinGW/4.9.2/x64/bin/../libexec/gcc/x86_64-w64-mingw32/4.9.2/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../../../src/gcc-4.9.2/configure --host=x86_64-w64-mingw32 --build=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --prefix=/mingw64 -
-with-sysroot=/c/mingw492/x86_64-492-posix-seh-rt_v3-rev1/mingw64 --with-gxx-include-dir=/mingw64/x86_64-w64-mingw32/include/c++ --enable-shared --ena
ble-static --disable-multilib --enable-languages=ada,c,c++,fortran,objc,obj-c++,lto --enable-libstdcxx-time=yes --enable-threads=posix --enable-libgom
p --enable-libatomic --enable-lto --enable-graphite --enable-checking=release --enable-fully-dynamic-string --enable-version-specific-runtime-libs --d
isable-isl-version-check --disable-cloog-version-check --disable-libstdcxx-pch --disable-libstdcxx-debug --enable-bootstrap --disable-rpath --disable-
win32-registry --disable-nls --disable-werror --disable-symvers --with-gnu-as --with-gnu-ld --with-arch=nocona --with-tune=core2 --with-libiconv --wit
h-system-zlib --with-gmp=/c/mingw492/prerequisites/x86_64-w64-mingw32-static --with-mpfr=/c/mingw492/prerequisites/x86_64-w64-mingw32-static --with-mp
c=/c/mingw492/prerequisites/x86_64-w64-mingw32-static --with-isl=/c/mingw492/prerequisites/x86_64-w64-mingw32-static --with-cloog=/c/mingw492/prerequi
sites/x86_64-w64-mingw32-static --enable-cloog-backend=isl --with-pkgversion='x86_64-posix-seh-rev1, Built by MinGW-W64 project' --with-bugurl=http://
sourceforge.net/projects/mingw-w64 CFLAGS='-O2 -pipe -I/c/mingw492/x86_64-492-posix-seh-rt_v3-rev1/mingw64/opt/include -I/c/mingw492/prerequisites/x86
_64-zlib-static/include -I/c/mingw492/prerequisites/x86_64-w64-mingw32-static/include' CXXFLAGS='-O2 -pipe -I/c/mingw492/x86_64-492-posix-seh-rt_v3-re
v1/mingw64/opt/include -I/c/mingw492/prerequisites/x86_64-zlib-static/include -I/c/mingw492/prerequisites/x86_64-w64-mingw32-static/include' CPPFLAGS=
 LDFLAGS='-pipe -L/c/mingw492/x86_64-492-posix-seh-rt_v3-rev1/mingw64/opt/lib -L/c/mingw492/prerequisites/x86_64-zlib-static/lib -L/c/mingw492/prerequ
isites/x86_64-w64-mingw32-static/lib '
Thread model: posix
gcc version 4.9.2 (x86_64-posix-seh-rev1, Built by MinGW-W64 project)