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kselftest/arm64: mte: Output warning about failing compiler 

At the moment we check the compiler's ability to compile MTE enabled
code, but guard all the Makefile rules by it. As a consequence a broken
or not capable compiler just doesn't do anything, and make happily
returns without any error message, but with no programs created.

Since the MTE feature is only supported by recent aarch64 compilers (not
all stable distro compilers support it), having an explicit message
seems like a good idea. To not break building multiple targets, we let
make proceed without errors.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Mark Brown <broone@kernel.org>
Link: https://lore.kernel.org/r/20210319165334.29213-9-andre.przywara@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Andre Przywara 2021-03-19 16:53:31 +00:00 committed by Catalin Marinas
parent 5238c2cd5a
commit 8bbb58a3c6
1 changed files with 3 additions and 0 deletions
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3
tools/testing/selftests/arm64/mte/Makefile
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@ -23,6 +23,9 @@ TEST_GEN_PROGS := $(PROGS)
# Get Kernel headers installed and use them.
KSFT_KHDR_INSTALL := 1
else
$(warning compiler "$(CC)" does not support the ARMv8.5 MTE extension.)
$(warning test program "mte" will not be created.)
endif
# Include KSFT lib.mk.