gcc 7.1.1 on Fedora 26 dumpversion now only includes major version by default

Question

After upgrading from Fedora 25 to 26 the default gcc version is now version 7.1.1 and the output of gcc -dumpversion has changed from major.minor.patch to just

Answer 1

So after some research I found the configure the version is a compile time option (if you compile the compiler from source).

I also found that there is a new gcc -dumpfullversion option that will provide the full version number, ie 7.1.1 which is what our build system expects. Small caveat is that -dumpfullversion is not supported on older versions of gcc.

So we had to change the build system to get the version via gcc -dumpversion and check if its a single digit and if so then substitute -dumpfullversion to get the full major.minor.patch gcc version.