linux-kernel - Re: [PATCH 1/2] perf: add test for strlcpy()

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Date:	Sat, 21 Aug 2010 14:15:37 -0300
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] perf: add test for strlcpy()

Em Sat, Aug 21, 2010 at 03:38:20AM +0300, Kirill A. Shutemov escreveu:
> Some Linux distributions like ALT Linux provides patched glibc with
> contains strlcpy(). It's confilcts with strlcpy() from perf.
> 
> Let's add check for strlcpy().

It doesn't work on !ALT Linux ;-\

    LINK /home/acme/git/build/perf//perf
/home/acme/git/build/perf//libperf.a(path.o): In function `perf_vsnpath':
/home/acme/git/linux/tools/perf/util/path.c:74: undefined reference to `strlcpy'
/home/acme/git/build/perf//libperf.a(abspath.o): In function `get_pwd_cwd':
/home/acme/git/linux/tools/perf/util/abspath.c:16: undefined reference to `strlcpy'
/home/acme/git/build/perf//libperf.a(abspath.o): In function `make_nonrelative_path':
/home/acme/git/linux/tools/perf/util/abspath.c:27: undefined reference to `strlcpy'
collect2: ld returned 1 exit status
make: *** [/home/acme/git/build/perf//perf] Error 1
make: Leaving directory `/home/acme/git/linux/tools/perf'
[acme@...lia linux]$ 

See below why:
 
> Signed-off-by: Kirill A. Shutemov <kirill@...temov.name>
> ---
>  tools/perf/Makefile          |    8 ++++++++
>  tools/perf/feature-tests.mak |   11 +++++++++++
>  tools/perf/util/cache.h      |    2 ++
>  tools/perf/util/path.c       |    3 ++-
>  4 files changed, 23 insertions(+), 1 deletions(-)
> 
> diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> index 4f1fa77..496a0d6 100644
> --- a/tools/perf/Makefile
> +++ b/tools/perf/Makefile
> @@ -653,6 +653,14 @@ else
> diff --git a/tools/perf/util/path.c b/tools/perf/util/path.c
> index 58a470d..029661c 100644
> --- a/tools/perf/util/path.c
> +++ b/tools/perf/util/path.c
> @@ -22,6 +22,7 @@ static const char *get_perf_dir(void)
>  	return ".";
>  }
>  
> +#ifdef STRLCPY

Should be:

+#ifdef NO_STRLCPY

I'm fixing it up.

>  size_t strlcpy(char *dest, const char *src, size_t size)
>  {
>  	size_t ret = strlen(src);
> @@ -33,7 +34,7 @@ size_t strlcpy(char *dest, const char *src, size_t size)
>  	}
>  	return ret;
>  }
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