------- Comment #1 from pinskia at gmail dot com 2008-09-17 03:09 ------- Subject: Re: New: gcc help should provide subarchitecture details
Sent from my iPhone On Sep 16, 2008, at 7:44 PM, "martinrb at google dot com" <[EMAIL PROTECTED] > wrote: > How do I find out whether a particular gcc supports a > particular subarchitecture, e.g. MMX instructions, by default? > If the gcc has been configured --with-arch=XXXX, > I can get that value using: > gcc -v --help 2>&1 | grep 'Configured with' > > but if the arch has defaulted based on the target triplet, > it is less obvious. Is it documented that > configure i486-xxxxxx > is equivalent to > configure .... --with-arch=i486 > ? > > Even better, it would be nice if gcc -v --help > said something like: > mmx support is enabled (use -mno-mmx to disable it) > sse support is disabled (use -msse to enable it) > > I would have guessed gcc -dumpspecs would give me > this kind of information, but it appears not to. This is already done in 4.3.0 where it shows the options and what are enabled already. > > > > -- > Summary: gcc help should provide subarchitecture details > Product: gcc > Version: 4.2.3 > Status: UNCONFIRMED > Severity: normal > Priority: P3 > Component: driver > AssignedTo: unassigned at gcc dot gnu dot org > ReportedBy: martinrb at google dot com > GCC host triplet: x86_64-linux-gnu > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37551 > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37551
