On Thu, Oct 08, 2020 at 03:26:21PM +0300, Tommi Rantala wrote:
> Commit 1056d3d2c97e ("selftests: enforce local header dependency in
> lib.mk") added header dependency to the rule, but as the rule uses $^,
> the headers are added to the compiler command line.
>
> This can cause unexpected precompiled header files being generated when
> compilation fails:
>
> $ echo { >> openat2_test.c
>
> $ make
> gcc -Wall -O2 -g -fsanitize=address -fsanitize=undefined openat2_test.c
> tools/testing/selftests/kselftest_harness.h tools/testing/selftests/kselftest.h helpers.c
> -o tools/testing/selftests/openat2/openat2_test
> openat2_test.c:313:1: error: expected identifier or ‘(’ before ‘{’ token
> 313 | {
> | ^
> make: *** [../lib.mk:140: tools/testing/selftests/openat2/openat2_test] Error 1
>
> $ file openat2_test*
> openat2_test: GCC precompiled header (version 014) for C
> openat2_test.c: C source, ASCII text
>
> Fix it by filtering out the headers, so that we'll only pass the actual
> *.c files in the compiler command line.
>
> Fixes: 1056d3d2c97e ("selftests: enforce local header dependency in lib.mk")
> Signed-off-by: Tommi Rantala <tommi.t.rantala@xxxxxxxxx>
Ah yes, thanks!
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
--
Kees Cook
