What is the latest version of gcc, g++, and libg++?
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   The latest "2.x" version of gcc/g++ is 2.7.2, released November 26,
1995.  The latest version of libg++ is 2.7.1, released November 12,
1995.

   Don't use 2.5.x, with x less than 5, for C++ code; there were some
serious bugs that didn't have easy workarounds.  2.5.8 is the most
solid 2.5.x release.  2.6.3 is the most solid 2.6.x release.

   For some non-Unix platforms, the latest port of gcc may be an earlier
version (2.5.8, say).  You'll need to use a version of libg++ that has
the same first two digits as the compiler version, e.g. use libg++
2.5.x (for the latest x you can find) with gcc version 2.5.8.

   The latest "1.x" version of gcc is 1.42, and the latest "1.x"
version of g++ is 1.42.0.  While gcc 1.42 is quite usable for C
programs, I recommend against using g++ 1.x except in special
circumstances (and I can't think of any such circumstances).