# sean at durian in ~/AUR [18:42:01]
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-5-20160209/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-multilib --disable-werror --enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)

# sean at durian in ~/AUR [18:42:01]
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-unknown-linux-gnu/5.3.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /build/gcc/src/gcc-5-20160209/configure --prefix=/usr \
    --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man \
    --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ \
    --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared \
    --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
    --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
    --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object \
    --enable-linker-build-id --enable-lto --enable-plugin \
    --enable-install-libiberty --with-linker-hash-style=gnu \
    --enable-gnu-indirect-function --disable-multilib --disable-werror \
    --enable-checking=release
Thread model: posix
gcc version 5.3.0 (GCC)