[Bug libstdc++/43203] abi_check from libstdc++ tests fails with CFLAGS="-march=core2"

[paolo dot carlini at oracle dot com]

------- Comment #8 from paolo dot carlini at oracle dot com  2010-02-28 00:05 -------
The default is of course "-O2 -g", and I can tell you for sure that we (the
maintainers) always use it (when we are not debugging) and the same is true for
all the most important Linux distros. By the way, no warnings *at all* are
emitted during the build, again, for sure on the major Linux distros. If you
are referring to your own code, this is off-topic here, but normally a
*release* build uses at least -O2, otherwise, performance are just *horrible*.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43203