On 7/30/2026 1:04 AM, Jim Lin wrote:
Skip a multilib only when it is exactly equivalent to the default: it
shares the default march and mabi and carries no other distinguishing
option (such as mcmodel). A multilib that matches the default march/mabi
but differs in another option is kept.
This fixes a broken Ada build. When configured with
--with-multilib-list=lp64d, the lp64d multilib is the default but was
still emitted as a separate multilib, so MULTISUBDIR became /lib64/lp64d
instead of empty.
gcc/ChangeLog:
* common/config/riscv/riscv-common.cc
(riscv_multi_lib_info_t::parse): Skip a multilib that is exactly
equivalent to the default march/mabi.
Signed-off-by: Jim Lin <[email protected]>
So it looks sensible, but I do have a question. Can we get other
options outside -march, -mabi, and -mcmodel in that routine. For
example, does -mno-vector-strict-align if it were used get in there and
affect the multilib selection?
jeff
