silence some -Wuninitialized false positives
There are a few error functions that simply wrap error() and
provide a standardized message text. Like error(), they
always return -1; knowing that can help the compiler silence
some false positive -Wuninitialized warnings.
One strategy would be to just declare these as inline in the
header file so that the compiler can see that they always
return -1. However, gcc does not always inline them (e.g.,
it will not inline opterror, even with -O3), which renders
our change pointless.
Instead, let's follow the same route we did with error() in
the last patch, and define a macro that makes the constant
return value obvious to the compiler.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/cache.h b/cache.h
index 18fdd18..0e8e5d8 100644
--- a/cache.h
+++ b/cache.h
@@ -1136,6 +1136,9 @@
extern int git_env_bool(const char *, int);
extern int git_config_system(void);
extern int config_error_nonbool(const char *);
+#ifdef __GNUC__
+#define config_error_nonbool(s) (config_error_nonbool(s), -1)
+#endif
extern const char *get_log_output_encoding(void);
extern const char *get_commit_output_encoding(void);
diff --git a/config.c b/config.c
index fb3f868..526f682 100644
--- a/config.c
+++ b/config.c
@@ -1660,6 +1660,7 @@
* Call this to report error for your variable that should not
* get a boolean value (i.e. "[my] var" means "true").
*/
+#undef config_error_nonbool
int config_error_nonbool(const char *var)
{
return error("Missing value for '%s'", var);
diff --git a/parse-options.c b/parse-options.c
index c1c66bd..67e98a6 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -18,15 +18,6 @@
return error("BUG: switch '%c' %s", opt->short_name, reason);
}
-int opterror(const struct option *opt, const char *reason, int flags)
-{
- if (flags & OPT_SHORT)
- return error("switch `%c' %s", opt->short_name, reason);
- if (flags & OPT_UNSET)
- return error("option `no-%s' %s", opt->long_name, reason);
- return error("option `%s' %s", opt->long_name, reason);
-}
-
static int get_arg(struct parse_opt_ctx_t *p, const struct option *opt,
int flags, const char **arg)
{
@@ -594,3 +585,12 @@
return usage_with_options_internal(ctx, usagestr, opts, 0, err);
}
+#undef opterror
+int opterror(const struct option *opt, const char *reason, int flags)
+{
+ if (flags & OPT_SHORT)
+ return error("switch `%c' %s", opt->short_name, reason);
+ if (flags & OPT_UNSET)
+ return error("option `no-%s' %s", opt->long_name, reason);
+ return error("option `%s' %s", opt->long_name, reason);
+}
diff --git a/parse-options.h b/parse-options.h
index 71a39c6..e703853 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -177,6 +177,10 @@
extern int optbug(const struct option *opt, const char *reason);
extern int opterror(const struct option *opt, const char *reason, int flags);
+#ifdef __GNUC__
+#define opterror(o,r,f) (opterror((o),(r),(f)), -1)
+#endif
+
/*----- incremental advanced APIs -----*/
enum {
