Test issue when built with `-march=armv9-a`
openSUSE started a new project recently to rebuild a subset of openSUSE Tumbleweed aarch64 packages for armv9. Building for armv9 leads to the following test issue:
[ 54s] [1/18] Generating src/version.h with a custom command
[ 54s] 1/14 common.c OK 0.06s
[ 54s] 2/14 dummy.c OK 0.03s
[ 54s] 3/14 lut.c OK 0.03s
[ 54s] 4/14 filters.c OK 0.02s
[ 54s] 5/14 string.c OK 0.02s
[ 54s] 6/14 colorspace.c FAIL 0.11s exit status 1
[ 54s] >>> MSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 LD_LIBRARY_PATH=/home/abuild/rpmbuild/BUILD/libplacebo5-5.264.1-build/libplacebo-v5.264.1/aarch64-suse-linux/src MESON_TEST_ITERATION=1 ASAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1 UBSAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1:print_stacktrace=1 /home/abuild/rpmbuild/BUILD/libplacebo5-5.264.1-build/libplacebo-v5.264.1/aarch64-suse-linux/src/tests/test.colorspace.c
[ 54s] ――――――――――――――――――――――――――――――――――――― ✀ ―――――――――――――――――――――――――――――――――――――
[ 54s] stdout:
[ 54s] testing color system 0
[ 54s] testing color system 1
[ 54s] testing color system 2
[ 54s] testing color system 3
[ 54s] testing color system 4
[ 54s] testing color system 9
[ 54s] testing color system 10
[ 54s] stderr:
[ 54s] === FAILED: 'white[1] ≈ 1.0' at ../src/tests/colorspace.c:158
[ 54s] white[1] = 0.511415
[ 54s] 1.0 = 1.000000
[ 54s] epsilon 1e-6 -> max delta = 0.000001
[ 54s]
[ 54s] ――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――
[ 54s]
[ 54s] 7/14 dither.c OK 0.10s
[ 54s] 8/14 tone_mapping.c OK 0.07s
[ 54s] 9/14 utils.c OK 0.05s
[ 54s] 10/14 icc.c OK 0.04s
[ 54s] 11/14 dav1d.c OK 0.02s
[ 54s] 12/14 vulkan.c OK 0.05s
[ 54s] 13/14 libav.c OK 0.01s
[ 55s] 14/14 opengl_surfaceless.c SKIP 0.21s exit status 77
[ 55s]
[ 55s] Summary of Failures:
[ 55s]
[ 55s] 6/14 colorspace.c FAIL 0.11s exit status 1
[ 55s]
[ 55s] Ok: 12
[ 55s] Fail: 1
[ 55s] Skipped: 1 There is no such issue when targeting armv8.0.
Full list of build flags used:
- For armv8:
-mbranch-protection=standard -O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g - For armv9:
-mbranch-protection=standard -O2 -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -Werror=return-type -flto=auto -g -march=armv9-a
If we add -ffp-contract=off to the list of build flags, there is no test issue anymore on armv9.