https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112759
Bug ID: 112759
Summary: [13 regression] mips -march=native detection broken
with gcc 13+
Product: gcc
Version: 13.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: driver
Assignee: unassigned at gcc dot gnu.org
Reporter: matoro_gcc_bugzilla at matoro dot tk
Target Milestone: ---
Since gcc 13 - and presumably 66c48be23e0fa5ee7474b4b078e013f901c71eed since
that is the only recent change to this area - detection of -march=native on
mips is broken, defaulting to mips1.
With gcc 13:
# gcc -march=native -Q --help=target | grep "arch=" | head -n 1
-march=ISA mips1
# gcc --version
gcc (Gentoo 13.2.1_p20231014 p9) 13.2.1 20231014
With gcc 12:
# gcc -march=native -Q --help=target | grep "arch=" | head -n 1
-march=ISA octeon2
# gcc --version
gcc (Gentoo 12.3.1_p20230825 p2) 12.3.1 20230825
Contents of my /proc/cpuinfo are attached. strace seems to indicate that it is
reading the data at least:
openat(AT_FDCWD, "/proc/cpuinfo", O_RDONLY) = 3
statx(3, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH,
STATX_BASIC_STATS, {stx_mask=STATX_BASIC_STATS|STATX_MNT_ID, stx_attributes=0,
stx_mode=S_IFREG|0444, stx_size=0, ...}) = 0
read(3, "system type\t\t: EBB6800 (CN6880p2"..., 1024) = 1024
close(3) = 0
