Hi Kees,
2018-04-13 14:06 GMT+09:00 Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>:
> Since commit d677a4d60193 ("Makefile: support flag
> -fsanitizer-coverage=trace-cmp"), you miss to build the SANCOV
> plugin under some circumstances.
>
> CONFIG_KCOV=y
> CONFIG_KCOV_ENABLE_COMPARISONS=y
> Your compiler does not support -fsanitize-coverage=trace-pc
> Your compiler does not support -fsanitize-coverage=trace-cmp
>
> Under this condition, $(CFLAGS_KCOV) is not empty but contains a
> space, so the following ifeq-conditional is false.
>
> ifeq ($(CFLAGS_KCOV),)
>
> Then, scripts/Makefile.gcc-plugins misses to add sancov_plugin.so to
> gcc-plugin-y while the SANCOV plugin is necessary as an alternative
> means.
>
> Fixes: d677a4d60193 ("Makefile: support flag -fsanitizer-coverage=trace-cmp")
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
> ---
I am planning to queue this up to the fixes branch
since this is a bug fix.
Do you have any comment on this?
> Changes in v3:
> - newly added
>
> Changes in v2: None
>
> scripts/Makefile.gcc-plugins | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins
> index b2a95af..7f5c862 100644
> --- a/scripts/Makefile.gcc-plugins
> +++ b/scripts/Makefile.gcc-plugins
> @@ -14,7 +14,7 @@ ifdef CONFIG_GCC_PLUGINS
> endif
>
> ifdef CONFIG_GCC_PLUGIN_SANCOV
> - ifeq ($(CFLAGS_KCOV),)
> + ifeq ($(strip $(CFLAGS_KCOV)),)
> # It is needed because of the gcc-plugin.sh and gcc version checks.
> gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
>
> --
> 2.7.4
>
--
Best Regards
Masahiro Yamada
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