How to determine supported languages in a particular installation of gcc?

["Thomas Mueller" <mueller6725%twc.com@localhost>]

How does one determine which languages (C, C++, Objective-C, Fortran, Ada, Go, D, Java,...) are supported by a given gcc?

With NetBSD-8.99.51 i386 base system, I run gcc -v and get

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/lto-wrapper
Target: i486--netbsdelf
Configured with: /usr/src/tools/gcc/../../external/gpl3/gcc/dist/configure --target=i486--netbsdelf --enable-long-long --enable-threads --with-bugurl=http://www.NetBSD.org/Misc/send-pr.html --with-pkgversion='NetBSD nb3 20190319' --with-system-zlib --without-isl --enable-__cxa_atexit --enable-libstdcxx-time=rt --enable-libstdcxx-threads --with-diagnostics-color=auto-if-env --with-arch=i486 --with-tune=nocona --with-default-libstdcxx-abi=new --with-mpc-lib=/var/obj/mknative/i386/usr/src/external/lgpl3/mpc/lib/libmpc --with-mpfr-lib=/var/obj/mknative/i386/usr/src/external/lgpl3/mpfr/lib/libmpfr --with-gmp-lib=/var/obj/mknative/i386/usr/src/external/lgpl3/gmp/lib/libgmp --with-mpc-include=/usr/src/external/lgpl3/mpc/dist/src --with-mpfr-include=/usr/src/external/lgpl3/mpfr/dist/src --with-gmp-include=/usr/src/external/lgpl3/gmp/lib/libgmp/arch/i386 --enable-tls --disable-multilib --disable-libstdcxx-pch --build=i486--netbsdelf --host=i486--netbsdelf --with-sysroot=/var/obj/mknative/i386
 /usr/src/destdir.i386
Thread model: posix
gcc version 7.4.0 (nb3 20190319) 

but I don't find enable-languages.

Tom