On Fri, 16 Oct 2015 13:16:59 +1100, Jonathan Gray wrote: > On Thu, Oct 15, 2015 at 08:09:57PM +0100, Stuart Henderson wrote: > > On 2015/10/15 18:16, Pascal Stumpf wrote: > > > On Wed, 14 Oct 2015 18:18:21 +0100, Stuart Henderson wrote: > > > > The gcc 4.9 port supports -msse4.2, but our assembler doesn't > > > > support (at least some of the) opcodes that it uses. > > > > > > > > : Assembler messages: > > > > :132: Error: no such instruction: `pcmpistri $2,(%rdi),%xmm2' > > > > :172: Error: no such instruction: `pcmpistri $2,%xmm3,%xmm1' > > > > :175: Error: no such instruction: `pcmpistri $58,%xmm3,%xmm3' > > > > > > > > Would it make sense to disable the option in the compiler for now? > > > > > > > > > > > > > > Not sure what that would achieve. Rejecting the flag would just move > > > the error from as to egcc. Any port using it would have to patch out > > > the option anyway (or use clang). > > > > > > > The port where I ran into this has an autoconf check to see whether > > the compiler accepts the flag. Since it's still a fairly new flag, > > I assume that anything else trying to use it would do the same. > > > > I ran into the same problem when trying to build Mesa with gcc 4.9 > a few months ago: > > https://bugs.freedesktop.org/show_bug.cgi?id=91806 > >
-O2 is likely your problem here. Is there a way to strip all optimisation flags before this test and restore them afterwards?
