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selftests: Fix O= and KBUILD_OUTPUT handling for relative paths
Fix O= and KBUILD_OUTPUT handling for relative paths.
export KBUILD_OUTPUT=../kselftest_size
make TARGETS=size kselftest-all
or
make O=../kselftest_size TARGETS=size kselftest-all
In both of these cases, targets get built in ../kselftest_size which is
a one level up from the size test directory.
make[1]: Entering directory '/mnt/data/lkml/kselftest_size'
make --no-builtin-rules INSTALL_HDR_PATH=$BUILD/usr \
ARCH=x86 -C ../../.. headers_install
INSTALL ../kselftest_size/usr/include
gcc -static -ffreestanding -nostartfiles -s get_size.c -o ../kselftest_size/size/get_size
/usr/bin/ld: cannot open output file ../kselftest_size/size/get_size: No such file or directory
collect2: error: ld returned 1 exit status
make[3]: *** [../lib.mk:138: ../kselftest_size/size/get_size] Error 1
make[2]: *** [Makefile:143: all] Error 2
make[1]: *** [/mnt/data/lkml/linux_5.4/Makefile:1221: kselftest-all] Error 2
make[1]: Leaving directory '/mnt/data/lkml/kselftest_size'
make: *** [Makefile:179: sub-make] Error 2
Use abs_objtree exported by the main Makefile.
Reported-by: Tim Bird <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>
Tested-by: Tim Bird <[email protected]>
Acked-by: Tim Bird <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>
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