On Wed, Aug 17, 2005 at 12:33:12PM -0700, James E Wilson wrote: > F. Heitkamp wrote: > > a particular cpu. Looking at the specs file for the host compiler the > > default is -mppc. When I gave the "--with-cpu=7400" shouldn't that have > > made the default -m7400?. What about xgcc, how can I make that use > > the 7400 cpu? > > Perhaps this is a case that gcc doesn't handle right. When you use the > -m7400 option, gcc will pass -maltivec to the assembler.
3.3.6 doesn't. > When you use --with-cpu=7400 at configure time, gcc should pass -maltivec > to the assembler by default. AFAICS, --with-cpu does only set the default CPU for the compiler. > This is apparently not happening, and is probably a gcc bug. ASM_SPEC > would have to be modified to fix this. You may be able to do this > manually by creating a spec file and editing it to add the missing > -maltivec option to the assembler specs. He should provide a suitable ASM_DEFAULT_SPEC for his port and modify the mcpu=7400 part of rs6000/rs6000.h/ASM_CPU_SPEC. > You may want to report this problem into the gcc bugzilla database so it > gets tracked and fixed. Well, 3.3.6 is a dead branch. 3.4.x and later have a proper ASM_CPU_SPEC. Gunther
