linux-kernel - Re: [PATCH] perf tool: build fix, remove duplicate declarations

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Date:	Thu, 31 May 2012 23:22:51 -0600
From:	David Ahern <dsahern@...il.com>
To:	acme@...stprotocols.net
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu, peterz@...radead.org,
	fweisbec@...il.com, paulus@...ba.org, tglx@...utronix.de
Subject: Re: [PATCH] perf tool: build fix, remove duplicate declarations

Arnaldo:

On 5/29/12 10:41 PM, David Ahern wrote:
> I'm sure I have some gremlins running around today, but I am
> consistently hitting this compile failure on Fedora 14 and 16:
>
> In file included from util/sort.h:12:0,
>                   from builtin-diff.c:15:
> util/string.h:7:5: error: redundant redeclaration of ‘hex2u64’ [-Werror=redundant-decls]
> util/symbol.h:32:5: note: previous declaration of ‘hex2u64’ was here
> util/string.h:8:7: error: redundant redeclaration of ‘strxfrchar’ [-Werror=redundant-decls]
> util/symbol.h:33:7: note: previous declaration of ‘strxfrchar’ was here
> util/string.h:9:5: error: redundant redeclaration of ‘perf_atoll’ [-Werror=redundant-decls]
> util/util.h:238:5: note: previous declaration of ‘perf_atoll’ was here
> util/string.h:10:8: error: redundant redeclaration of ‘argv_split’ [-Werror=redundant-decls]
> util/util.h:239:8: note: previous declaration of ‘argv_split’ was here
> util/string.h:11:6: error: redundant redeclaration of ‘argv_free’ [-Werror=redundant-decls]
> util/util.h:240:6: note: previous declaration of ‘argv_free’ was here
> util/string.h:12:6: error: redundant redeclaration of ‘strglobmatch’ [-Werror=redundant-decls]
> util/util.h:241:6: note: previous declaration of ‘strglobmatch’ was here
> util/string.h:13:6: error: redundant redeclaration of ‘strlazymatch’ [-Werror=redundant-decls]
> util/util.h:242:6: note: previous declaration of ‘strlazymatch’ was here
> cc1: all warnings being treated as errors
> make: *** [/tmp/pbuild/builtin-diff.o] Error 1
> make: *** Waiting for unfinished jobs....
> make: Leaving directory `/opt/sw/ahern/perf.git/tools/perf'

You are probably not hitting this compile problem, and I have no idea 
why I am suddenly hitting it on F14 and F16 (my usual test servers; i 
have always hit this on older systems), but nonetheless there are 
duplicate declarations between util.h and symbol.h which should be fixed.

David


>
> Fix it by removing duplicates.
>
> Signed-off-by: David Ahern<dsahern@...il.com>
> ---
>   tools/perf/util/symbol.h |    4 +---
>   tools/perf/util/util.h   |    6 +-----
>   2 files changed, 2 insertions(+), 8 deletions(-)
>
> diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
> index 1f00388..4ba5206 100644
> --- a/tools/perf/util/symbol.h
> +++ b/tools/perf/util/symbol.h
> @@ -9,6 +9,7 @@
>   #include<linux/list.h>
>   #include<linux/rbtree.h>
>   #include<stdio.h>
> +#include "string.h"
>
>   #ifdef HAVE_CPLUS_DEMANGLE
>   extern char *cplus_demangle(const char *, int);
> @@ -29,9 +30,6 @@ static inline char *bfd_demangle(void __used *v, const char __used *c,
>   #endif
>   #endif
>
> -int hex2u64(const char *ptr, u64 *val);
> -char *strxfrchar(char *s, char from, char to);
> -
>   /*
>    * libelf 0.8.x and earlier do not support ELF_C_READ_MMAP;
>    * for newer versions we can use mmap to reduce memory usage:
> diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
> index 2daaedb..5152592 100644
> --- a/tools/perf/util/util.h
> +++ b/tools/perf/util/util.h
> @@ -78,6 +78,7 @@
>   #include "../../../include/linux/magic.h"
>   #include "types.h"
>   #include<sys/ttydefaults.h>
> +#include "string.h"
>
>   extern const char *graph_line;
>   extern const char *graph_dotted_line;
> @@ -235,11 +236,6 @@ static inline int sane_case(int x, int high)
>   int mkdir_p(char *path, mode_t mode);
>   int copyfile(const char *from, const char *to);
>
> -s64 perf_atoll(const char *str);
> -char **argv_split(const char *str, int *argcp);
> -void argv_free(char **argv);
> -bool strglobmatch(const char *str, const char *pat);
> -bool strlazymatch(const char *str, const char *pat);
>   int strtailcmp(const char *s1, const char *s2);
>   unsigned long convert_unit(unsigned long value, char *unit);
>   int readn(int fd, void *buf, size_t size);

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