After have a discuss with Zhang Le, I believe the right thing
is
march=mips3, with -mfix-loongson2f-nop. This way the produced code can
run on both Loongson 2, and even any other MIPS3 compatible hardware.
Last night I spoke with Ralf Baechle (MIPS kernel developer). This is
what he said about targeting
< Ralf> If you build for MIPS II it'll run on every 32-bit CPU
(except R2000/R3000 which are '85 / '87) vintage.
< Ralf> MIPS III builds would run on anything 64-bit.
Eventually we want to target 'all' possible MIPS processors. But I can
accept for the moment to see the build of Fedora being targeted
towards the Loongson, since for now this is the only way for us the
verify and test if the packages work.
Gerard