On Tue, May 24, 2022 at 08:12:55PM +0200, Pali Rohár wrote: > On Tuesday 24 May 2022 12:59:55 Segher Boessenkool wrote: > > On Tue, May 24, 2022 at 11:39:39AM +0200, Pali Rohár wrote: > > > gcc e500 compiler does not support -mcpu=powerpc option. When it is > > > specified then gcc throws compile error: > > > > > > gcc: error: unrecognized argument in option ‘-mcpu=powerpc’ > > > gcc: note: valid arguments to ‘-mcpu=’ are: 8540 8548 native > > > > What? Are you using some modified version of GCC, perhaps? > > Hello! I'm using official gcc version, no special modification. > > > No version of GCC that isn't hamstrung can have this output. > > gcc for e500 cores has really this output when you pass -mcpu=powerpc. > > Upstream gcc dropped support for e500 cores during development of > version 9.
This isn't true. The SPE instruction extension is no longer supported (because it wasn't maintained). Everything else still works. > But you can still compile and install gcc 8.5.0 (last version > of gcc 8) which has this full e500 support. > > Really, you can easily try it. Debian 10 (Buster) has gcc 8.3.0 in its > default installation and also provides packages with cross compilers. > Just run 'sudo apt install gcc-powerpc-linux-gnuspe' on desktop amd64 > version of Debian 10, it will install e500 cross compiler. > > -mcpu=8540 specify e500v1 and -mcpu=8548 specify e500v2 Aha. Right, because this config forces -mspe it requires one of these CPUs. You can use a powerpc-linux compiler instead, and everything will just work. These CPUs are still supported, in all of GCC 9 .. GCC 12 :-) Segher
