https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117565
Bug ID: 117565
Summary: RISC-V: Make ABI implicit for non-default march
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: rdapp at gcc dot gnu.org
CC: kito.cheng at gmail dot com, law at gcc dot gnu.org,
palmer at dabbelt dot com, vineetg at rivosinc dot com
Target Milestone: ---
Target: riscv
This is not really high priority but has been discussed several times and at
some point we agreed to at least open a bug.
Right now e.g. -march=rv64gc mandates -mabi=lp64d (similar to how -march=rv32gc
or -march=rv64e mandate ABIs). We use the default ABI for the default -march,
so it's sufficient to say
gcc -march=rv64gc
in order to obtain the lp64d ABI.
When using -march=rv32gc on an -march=rv64gc default compiler, however,
-mabi=ilp32d needs to be specified even though there is not actually a choice
in ABIs.
Couldn't we set a default for those cases as well? Even if there were a choice
I'd say selecting the first one is sensible.
