*.[ch]: remove extern from function declarations using spatch

There has been a push to remove extern from function declarations.
Remove some instances of "extern" for function declarations which are
caught by Coccinelle. Note that Coccinelle has some difficulty with
processing functions with `__attribute__` or varargs so some `extern`
declarations are left behind to be dealt with in a future patch.

This was the Coccinelle patch used:

	@@
	type T;
	identifier f;
	@@
	- extern
	  T f(...);

and it was run with:

	$ git ls-files \*.{c,h} |
		grep -v ^compat/ |
		xargs spatch --sp-file contrib/coccinelle/noextern.cocci --in-place

Files under `compat/` are intentionally excluded as some are directly
copied from external sources and we should avoid churning them as much
as possible.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/trace.h b/trace.h
index 171b256d26..57faf3530a 100644
--- a/trace.h
+++ b/trace.h
@@ -17,12 +17,12 @@ extern struct trace_key trace_default_key;
 extern struct trace_key trace_perf_key;
 extern struct trace_key trace_setup_key;
 
-extern void trace_repo_setup(const char *prefix);
-extern int trace_want(struct trace_key *key);
-extern void trace_disable(struct trace_key *key);
-extern uint64_t getnanotime(void);
-extern void trace_command_performance(const char **argv);
-extern void trace_verbatim(struct trace_key *key, const void *buf, unsigned len);
+void trace_repo_setup(const char *prefix);
+int trace_want(struct trace_key *key);
+void trace_disable(struct trace_key *key);
+uint64_t getnanotime(void);
+void trace_command_performance(const char **argv);
+void trace_verbatim(struct trace_key *key, const void *buf, unsigned len);
 uint64_t trace_performance_enter(void);
 
 #ifndef HAVE_VARIADIC_MACROS
@@ -36,7 +36,7 @@ extern void trace_printf_key(struct trace_key *key, const char *format, ...);
 __attribute__((format (printf, 2, 3)))
 extern void trace_argv_printf(const char **argv, const char *format, ...);
 
-extern void trace_strbuf(struct trace_key *key, const struct strbuf *data);
+void trace_strbuf(struct trace_key *key, const struct strbuf *data);
 
 /* Prints elapsed time (in nanoseconds) if GIT_TRACE_PERFORMANCE is enabled. */
 __attribute__((format (printf, 2, 3)))
@@ -137,7 +137,7 @@ extern void trace_printf_key_fl(const char *file, int line, struct trace_key *ke
 __attribute__((format (printf, 4, 5)))
 extern void trace_argv_printf_fl(const char *file, int line, const char **argv,
 				 const char *format, ...);
-extern void trace_strbuf_fl(const char *file, int line, struct trace_key *key,
+void trace_strbuf_fl(const char *file, int line, struct trace_key *key,
 			    const struct strbuf *data);
 __attribute__((format (printf, 4, 5)))
 extern void trace_performance_fl(const char *file, int line,