> So I was forced to remove plain "gcc" and "g++" packages, install the gcc-4.2 
> and g++-4.2 versions,
> and create links using "ln", named "gcc" and "g++", to /usr/bin/gcc-4.2 and 
> /usr/bin/g++-4.2 respectively.

No, you should build using CC=gcc-4.2 and CXX=g++-4.2. ABIs may differ
for different GCC releases, so changing this may lead to broken packages
when rebuilt.

> I think the prerelease versions may contain bugs/deficiencies/
> and security issues to produced programs, so I think the "gcc and "g++"
> should be changed to link to the official releases ASAP.

No. If you are aware of problems please file specific bug reports. A
prerelease of a version from a stable branch is usually even more
tested.


** Changed in: gcc-defaults (Ubuntu)
       Status: New => Invalid

-- 
Wrong gcc/g++ defaults
https://bugs.launchpad.net/bugs/209200
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