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authorIngo Molnar <mingo@elte.hu>2009-08-15 12:26:57 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-16 10:47:47 +0200
commit83a0944fa919fb2ebcfc1f8933d86e437b597ca6 (patch)
tree814906744656554a1bc07cdad6b84b3581565358 /tools/perf/util/parse-options.c
parent6baa0a5ae0954fb2486c480a20556a9f1aee0965 (diff)
downloadop-kernel-dev-83a0944fa919fb2ebcfc1f8933d86e437b597ca6.zip
op-kernel-dev-83a0944fa919fb2ebcfc1f8933d86e437b597ca6.tar.gz
perf: Enable more compiler warnings
Related to a shadowed variable bug fix Valdis Kletnieks noticed that perf does not get built with -Wshadow, which could have helped us avoid the bug. So enable -Wshadow and also enable the following warnings on perf builds, in addition to the already enabled -Wall -Wextra -std=gnu99 warnings: -Wcast-align -Wformat=2 -Wshadow -Winit-self -Wpacked -Wredundant-decls -Wstack-protector -Wstrict-aliasing=3 -Wswitch-default -Wswitch-enum -Wno-system-headers -Wundef -Wvolatile-register-var -Wwrite-strings -Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wold-style-definition -Wstrict-prototypes -Wdeclaration-after-statement And change/fix the perf code to build cleanly under GCC 4.3.2. The list of warnings enablement is rather arbitrary: it's based on my (quick) reading of the GCC manpages and trying them on perf. I categorized the warnings based on individually enabling them and looking whether they trigger something in the perf build. If i liked those warnings (i.e. if they trigger for something that arguably could be improved) i enabled the warning. If the warnings seemed to come from language laywers spamming the build with tons of nuisance warnings i generally kept them off. Most of the sign conversion related warnings were in this category. (A second patch enabling some of the sign warnings might be welcome - sign bugs can be nasty.) I also kept warnings that seem to make sense from their manpage description and which produced no actual warnings on our code base. These warnings might still be turned off if they end up being a nuisance. I also left out a few warnings that are not supported in older compilers. [ Note that these changes might break the build on older compilers i did not test, or on non-x86 architectures that produce different warnings, so more testing would be welcome. ] Reported-by: Valdis.Kletnieks@vt.edu Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/parse-options.c')
-rw-r--r--tools/perf/util/parse-options.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/perf/util/parse-options.c b/tools/perf/util/parse-options.c
index 1bf6719..6d8af48 100644
--- a/tools/perf/util/parse-options.c
+++ b/tools/perf/util/parse-options.c
@@ -53,6 +53,12 @@ static int get_value(struct parse_opt_ctx_t *p,
case OPTION_SET_INT:
case OPTION_SET_PTR:
return opterror(opt, "takes no value", flags);
+ case OPTION_END:
+ case OPTION_ARGUMENT:
+ case OPTION_GROUP:
+ case OPTION_STRING:
+ case OPTION_INTEGER:
+ case OPTION_LONG:
default:
break;
}
@@ -130,6 +136,9 @@ static int get_value(struct parse_opt_ctx_t *p,
return opterror(opt, "expects a numerical value", flags);
return 0;
+ case OPTION_END:
+ case OPTION_ARGUMENT:
+ case OPTION_GROUP:
default:
die("should not happen, someone must be hit on the forehead");
}
@@ -296,6 +305,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
return parse_options_usage(usagestr, options);
case -2:
goto unknown;
+ default:
+ break;
}
if (ctx->opt)
check_typos(arg + 1, options);
@@ -314,6 +325,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
ctx->argv[0] = strdup(ctx->opt - 1);
*(char *)ctx->argv[0] = '-';
goto unknown;
+ default:
+ break;
}
}
continue;
@@ -336,6 +349,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
return parse_options_usage(usagestr, options);
case -2:
goto unknown;
+ default:
+ break;
}
continue;
unknown:
@@ -456,6 +471,13 @@ int usage_with_options_internal(const char * const *usagestr,
}
break;
default: /* OPTION_{BIT,BOOLEAN,SET_INT,SET_PTR} */
+ case OPTION_END:
+ case OPTION_GROUP:
+ case OPTION_BIT:
+ case OPTION_BOOLEAN:
+ case OPTION_SET_INT:
+ case OPTION_SET_PTR:
+ case OPTION_LONG:
break;
}
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