John Hubbard 019baf635e selftests/binderfs: use the Makefile's rules, not Make's implicit rules ... First of all, in order to build with clang at all, one must first apply Valentin Obst's build fix for LLVM [1]. Once that is done, then when building with clang, via: make LLVM=1 -C tools/testing/selftests ...the following error occurs: clang: error: cannot specify -o when generating multiple output files This is because clang, unlike gcc, won't accept invocations of this form: clang file1.c header2.h While trying to fix this, I noticed that: a) selftests/lib.mk already avoids the problem, and b) The binderfs Makefile indavertently bypasses the selftests/lib.mk build system, and quitely uses Make's implicit build rules for .c files instead. The Makefile attempts to set up both a dependency and a source file, neither of which was needed, because lib.mk is able to automatically handle both. This line: binderfs_test: binderfs_test.c ...causes Make's implicit rules to run, which builds binderfs_test without ever looking at lib.mk. Fix this by simply deleting the "binderfs_test:" Makefile target and letting lib.mk handle it instead. [1] https://lore.kernel.org/all/20240329-selftests-libmk-llvm-rfc-v1-1-2f9ed7d1c49f@valentinobst.de/ Fixes: 6e29225af9 ("binderfs: port tests to test harness infrastructure") Cc: Christian Brauner <brauner@kernel.org> Signed-off-by: John Hubbard <jhubbard@nvidia.com> Reviewed-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>		2024-05-06 13:57:21 -06:00
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