We only support one configuration in Fedora: RV64GC (arch) + LP64D (abi).
Note that RISC-V paths by default feel like multi-lib. We are compiling
with multi-lib enabled, but only one ABI selected (LP64D). This allows
us to get desired install paths.
All extra patches were already posted to gcc-patches and are pending
review.
Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>