From: "Tyler Hicks" code@tyhicks.com
When attempting to build kselftests with a separate output directory, a number of the tests fail to build.
For example,
$ rm -rf build && \ make INSTALL_HDR_PATH=build/usr headers_install > /dev/null && \ make O=build FORCE_TARGETS=1 TARGETS=breakpoints -C tools/testing/selftests > /dev/null /usr/bin/ld: cannot open output file build/kselftest/breakpoints/step_after_suspend_test: No such file or directory collect2: error: ld returned 1 exit status make[1]: *** [../lib.mk:146: build/kselftest/breakpoints/step_after_suspend_test] Error 1 make: *** [Makefile:163: all] Error 2
This has already been addressed upstream with v5.18 commit 5ad51ab618de ("selftests: set the BUILD variable to absolute path"). It is a clean cherry pick to the linux-5.15.y and linux-5.10.y branches.
Tyler
Muhammad Usama Anjum (1): selftests: set the BUILD variable to absolute path
tools/testing/selftests/Makefile | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-)