linux-kernel - Re: [PATCH] perf build: Fix unescaped # in perf build-test

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Date:   Fri, 28 Apr 2023 22:54:35 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     James Clark <james.clark@....com>
Cc:     linux-perf-users@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH] perf build: Fix unescaped # in perf build-test

Em Tue, Apr 25, 2023 at 11:44:13AM +0100, James Clark escreveu:
> With the following bash and make versions:
> 
>   $ make --version
>   GNU Make 4.2.1
>   Built for aarch64-unknown-linux-gnu
> 
>   $ bash --version
>   GNU bash, version 5.0.17(1)-release (aarch64-unknown-linux-gnu)
> 
> This error is encountered when running the build-test target:

Thanks, applied.

- Arnaldo

 
>   $ make -C tools/perf build-test
>   tests/make:181: *** unterminated call to function 'shell': missing ')'.  Stop.
>   make: *** [Makefile:103: build-test] Error 2
> 
> Fix it by escaping the # which was causing make to interpret the rest of
> the line as a comment leaving the unclosed opening bracket.
> 
> Fixes: 56d5229471ee ("tools build: Pass libbpf feature only if libbpf 1.0+")
> Signed-off-by: James Clark <james.clark@....com>
> ---
>  tools/perf/tests/make | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/perf/tests/make b/tools/perf/tests/make
> index d75876126631..8dd3f8090352 100644
> --- a/tools/perf/tests/make
> +++ b/tools/perf/tests/make
> @@ -178,7 +178,7 @@ run += make_install_prefix_slash
>  # run += make_install_pdf
>  run += make_minimal
>  
> -old_libbpf := $(shell echo "#include <bpf/libbpf.h>" | $(CC) -E -dM -x c -| egrep -q "define[[:space:]]+LIBBPF_MAJOR_VERSION[[:space:]]+0{1}")
> +old_libbpf := $(shell echo '\#include <bpf/libbpf.h>' | $(CC) -E -dM -x c -| egrep -q "define[[:space:]]+LIBBPF_MAJOR_VERSION[[:space:]]+0{1}")
>  
>  ifneq ($(old_libbpf),)
>  run += make_libbpf_dynamic
> -- 
> 2.34.1
> 

-- 

- Arnaldo