RE: [V21.4] "clever" compilers sometimes opt away too much.
If that claim can be verified, I would (at the least) approve
an entry for the PROBLEMS file. Disallowing that compiler in
configure is another possibility, but that seems fairly
drastic, as I'm pretty sure that some people have gotten
useful builds out of gcc-3.4.2.
Best solution might be to just have a warning outputted when gcc-3.4.2 is
detected, stating that compiler problems have been observed with this
compiler.