linux-kernel - Re: perf tool build error

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Date:	Tue, 18 May 2010 09:20:41 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...hat.com>
Cc:	"mingo@...e.hu" <mingo@...e.hu>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: perf tool build error

On Mon, 2010-05-17 at 22:54 +0800, Arnaldo Carvalho de Melo wrote:
> Em Mon, May 17, 2010 at 11:21:44AM +0800, Lin Ming escreveu:
> > Build perf tool in latest tip tree(17efbf4) fails,
> > 
> > $ gcc --version
> > gcc (GCC) 4.3.2 20081105 (Red Hat 4.3.2-7)
>  
> > cc1: warnings being treated as errors
> > util/newt.c: In function ‘objdump_line__show’:
> > util/newt.c:252: error: passing argument 1 of ‘SLsmg_printf’ discards qualifiers from pointer target type
> > util/newt.c:258: error: passing argument 1 of ‘SLsmg_write_nstring’ discards qualifiers from pointer target type
> 
> What distribution is this?

Fedora 10 32bit.

> 
> The problem here lies in the slang-devel package, I guess we'll have
> to have the following patch, please apply and see if it cures the issue.
> The problem doesn't happen at least in slang >= 2.1.4 when we define 
> ENABLE_SLFUTURE_CONST, as we do in tools/perf/Makefile, but since we
> want to have perf building in as many scenarios as possible, the patch
> is needed, please let me know if it works for you and I'll queue it up.

Yes, it works.

Thanks,
Lin Ming

> 
> - Arnaldo
> 
> diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
> index 2001d26..ccb7c5b 100644
> --- a/tools/perf/util/newt.c
> +++ b/tools/perf/util/newt.c
> @@ -14,6 +14,17 @@
>  #include "sort.h"
>  #include "symbol.h"
>  
> +#if SLANG_VERSION < 20104
> +#define slsmg_printf(msg, args...) SLsmg_printf((char *)msg, ##args)
> +#define slsmg_write_nstring(msg, len) SLsmg_write_nstring((char *)msg, len)
> +#define sltt_set_color(obj, name, fg, bg) SLtt_set_color(obj,(char *)name,\
> +							 (char *)fg, (char *)bg)
> +#else
> +#define slsmg_printf SLsmg_printf
> +#define slsmg_write_nstring SLsmg_write_nstring
> +#define sltt_set_color SLtt_set_color
> +#endif
> +
>  struct ui_progress {
>  	newtComponent form, scale;
>  };
> @@ -292,21 +303,21 @@ static int objdump_line__show(struct objdump_line *self, struct list_head *head,
>  
>  		color = ui_browser__percent_color(percent, current_entry);
>  		SLsmg_set_color(color);
> -		SLsmg_printf(" %7.2f ", percent);
> +		slsmg_printf(" %7.2f ", percent);
>  		if (!current_entry)
>  			SLsmg_set_color(HE_COLORSET_CODE);
>  	} else {
>  		int color = ui_browser__percent_color(0, current_entry);
>  		SLsmg_set_color(color);
> -		SLsmg_write_nstring(" ", 9);
> +		slsmg_write_nstring(" ", 9);
>  	}
>  
>  	SLsmg_write_char(':');
> -	SLsmg_write_nstring(" ", 8);
> +	slsmg_write_nstring(" ", 8);
>  	if (!*self->line)
> -		SLsmg_write_nstring(" ", width - 18);
> +		slsmg_write_nstring(" ", width - 18);
>  	else
> -		SLsmg_write_nstring(self->line, width - 18);
> +		slsmg_write_nstring(self->line, width - 18);
>  
>  	return 0;
>  }
> @@ -1054,11 +1065,11 @@ void setup_browser(void)
>  	newtInit();
>  	newtCls();
>  	ui_helpline__puts(" ");
> -	SLtt_set_color(HE_COLORSET_TOP, NULL, c->topColorFg, c->topColorBg);
> -	SLtt_set_color(HE_COLORSET_MEDIUM, NULL, c->mediumColorFg, c->mediumColorBg);
> -	SLtt_set_color(HE_COLORSET_NORMAL, NULL, c->normalColorFg, c->normalColorBg);
> -	SLtt_set_color(HE_COLORSET_SELECTED, NULL, c->selColorFg, c->selColorBg);
> -	SLtt_set_color(HE_COLORSET_CODE, NULL, c->codeColorFg, c->codeColorBg);
> +	sltt_set_color(HE_COLORSET_TOP, NULL, c->topColorFg, c->topColorBg);
> +	sltt_set_color(HE_COLORSET_MEDIUM, NULL, c->mediumColorFg, c->mediumColorBg);
> +	sltt_set_color(HE_COLORSET_NORMAL, NULL, c->normalColorFg, c->normalColorBg);
> +	sltt_set_color(HE_COLORSET_SELECTED, NULL, c->selColorFg, c->selColorBg);
> +	sltt_set_color(HE_COLORSET_CODE, NULL, c->codeColorFg, c->codeColorBg);
>  }
>  
>  void exit_browser(bool wait_for_ok)

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