[OE-core] Q. Changing Preferred Version of GCC

[Lee, Yong]

Hello, I posted earlier but my question was unclear. Apologies!

Is it acceptable to expect different versions of GCC (via PREFERRED_VERSION_gcc) to play well with the rest of recipes/packages included in the same release branch?
Default for my current Yocto SDK (morty) is linaro-6.2, but I have a few packages that require an older version (possibly 5.4, which is included in meta).
Unfortunately GCC 5.4 is refusing to build at the moment.

I can post the error log, but I would like to run it by the developers here if this approach makes sense.

Adam
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