[Bug bootstrap/53266] Error: Unrecognized opcode: `mulhwu'

[skunk at iskunk dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53266

--- Comment #6 from Daniel Richard G. <skunk at iskunk dot org> 2012-09-25 21:38:32 UTC ---
Okay, I'm bootstrapping an unmodified 4.7.2, using a previously-built 4.7.0 as
CC and the following configuration options:

    --prefix=/opt/tg
    --disable-dependency-tracking
    --disable-maintainer-mode
    --program-prefix=tg-
    --disable-shared
    --disable-nls
    --enable-languages=c,c++
    --enable-version-specific-runtime-libs
    --with-pic
    --with-mpc=/tg/freeport/arch/aix32
    --with-mpfr=/tg/freeport/arch/aix32
    --with-gmp=/tg/freeport/arch/aix32
    --disable-powercpu

Last time I tried this with 4.7.0/4.7.1, there were numerous problems (none
having to do with bad PPC instructions, since I just used --with-cpu= et al. to
work around that). I actually have patches for most of the issues, and have
previously posted them at

    http://gcc.gnu.org/PR53348#c7

but David Edelsohn took no notice of them. If you're interested, I'll be happy
to update the patch for current SVN.

At any rate, I'll let you know how the build goes. This machine isn't exactly a
speed demon, so give it a day or three....