linux-kernel - Re: [PATCH 2/2] perf: unwinding: use the per-feature check flags

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Date:	Mon, 9 Dec 2013 18:17:19 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Jean Pihet <jean.pihet@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo <acme@...stprotocols.net>,
	Will Deacon <will.deacon@....com>, patches@...aro.org
Subject: Re: [PATCH 2/2] perf: unwinding: use the per-feature check flags

On Sat, Dec 07, 2013 at 11:17:41AM +0100, Jean Pihet wrote:
> Use the per-feature check flags for the unwinding feature in order
> to correctly compile the libunwind and libunwind-debug-frame feature
> checks.
> 
> Tested on x86_64, ARMv7 and ARMv8 with and without LIBUNWIND_DIR set
> in 'make -C tools/perf'
> 
> Signed-off-by: Jean Pihet <jean.pihet@...aro.org>
> Cc: Jiri Olsa <jolsa@...hat.com>

SNIP

> +BUILD = $(CC) $(CFLAGS) -o $(OUTPUT)$@ $@.c $(LDFLAGS)
>  
>  ###############################
>  
>  test-all:
> -	$(BUILD) -Werror -fstack-protector -fstack-protector-all -O2 -Werror -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma $(LIBUNWIND_LIBS) -lelf -laudit -I/usr/include/slang -lslang $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl
> +	$(BUILD) -Werror -fstack-protector -fstack-protector-all -O2 -Werror -D_FORTIFY_SOURCE=2 -ldw -lelf -lnuma -lelf -laudit -I/usr/include/slang -lslang $(shell pkg-config --libs --cflags gtk+-2.0 2>/dev/null) $(FLAGS_PERL_EMBED) $(FLAGS_PYTHON_EMBED) -DPACKAGE='"perf"' -lbfd -ldl

hum, the test-all build command should have every possible flags we use, right?
including LIBUNWIND_CFLAGS, LIBUNWIND_LDFLAGS

also, this patch no longer applies on acme's perf/core

jirka
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