Re: [PATCH v3] Makefile: add a prerequisite to the coverage-report target

> Directly invoking make coverage-report as a target results in an error because
> its prerequisites are missing,
>
> This patch adds the compile-test prerequisite, which is run only once each time
> the compile-report target is invoked. In practice, the developer may decide to
> review the coverage-report results without necessarily rerunning for this
> coverage-test, if it has already been run.
>
> Signed-off-by: Elia Pinto <gitter.spiros@gmail.com>
> ---
> This is the third revision of the patch. Compared to the second:
>
> - deleted the Makefile coverage-test.file variable, replaced directly by the
>   coverage-test.made file
> - added in coverage-compile as last command the touch of coverage-test.made, so
>   that even if coverage-test is run first, invoking indirectly it by the first coverage-report does not
>   call coverage-test and so the test suite gain.
>
>  Makefile | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index f8bccfab5e..d6ae228c74 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -3407,6 +3407,7 @@ coverage-clean-results:
>  	$(RM) coverage-untested-functions
>  	$(RM) -r cover_db/
>  	$(RM) -r cover_db_html/
> +	$(RM) coverage-test.made
>  
>  coverage-clean: coverage-clean-results
>  	$(RM) $(addsuffix *.gcno,$(object_dirs))
> @@ -3421,13 +3422,18 @@ coverage-compile:
>  coverage-test: coverage-clean-results coverage-compile
>  	$(MAKE) CFLAGS="$(COVERAGE_CFLAGS)" LDFLAGS="$(COVERAGE_LDFLAGS)" \
>  		DEFAULT_TEST_TARGET=test -j1 test
> +	touch coverage-test.made
> +
> +coverage-test.made:
> +	@make coverage-test