How do I check my gcc C++ compiler version for my Eclipse?

gcc -dumpversion

-dumpversion Print the compiler version (for example, 3.0) — and don't do anything else.

The same works for following compilers/aliases:

cc -dumpversion
g++ -dumpversion
clang -dumpversion
tcc -dumpversion

Be careful with automate parsing the GCC output:

Output of --version might be localized (e.g. to Russian, Chinese, etc.)
GCC might be built with option --with-gcc-major-version-only. And some distros (e.g. Fedora) are already using that
GCC might be built with option --with-pkgversion. And --version output will contain something like Android (5220042 based on r346389c) clang version 8.0.7 (it's real version string)

Just type

gcc --version

in any terminal near you.. ;-)

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