sparse: Fix mingw_main() argument number/type errors

Sparse issues 68 errors (two errors for each main() function) such
as the following:

      SP git.c
  git.c:510:5: error: too many arguments for function mingw_main
  git.c:510:5: error: symbol 'mingw_main' redeclared with different type \
    (originally declared at git.c:510) - different argument counts

The errors are caused by the 'main' macro used by the MinGW build
to provide a replacement main() function. The original main function
is effectively renamed to 'mingw_main' and is called from the new
main function. The replacement main is used to execute certain actions
common to all git programs on MinGW (e.g. ensure the standard I/O
streams are in binary mode).

In order to suppress the errors, we change the macro to include the
parameters in the declaration of the mingw_main function.

Unfortunately, this change provokes both sparse and gcc to complain
about 9 calls to mingw_main(), such as the following:

      CC git.o
  git.c: In function 'main':
  git.c:510: warning: passing argument 2 of 'mingw_main' from \
    incompatible pointer type
  git.c:510: note: expected 'const char **' but argument is of \
    type 'char **'

In order to suppress these warnings, since both of the main
functions need to be declared with the same prototype, we
change the declaration of the 9 main functions, thus:

    int main(int argc, char **argv)

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

compat/mingw.h

@@ -346,8 +346,8 @@ extern CRITICAL_SECTION pinfo_cs;
  */
 
 #define main(c,v) dummy_decl_mingw_main(); \
-static int mingw_main(); \
+static int mingw_main(c,v); \
-int main(int argc, const char **argv) \
+int main(int argc, char **argv) \
 { \
 	extern CRITICAL_SECTION pinfo_cs; \
 	_fmode = _O_BINARY; \

credential-store.c

@@ -114,7 +114,7 @@ static int lookup_credential(const char *fn, struct credential *c)
 	return c->username && c->password;
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	const char * const usage[] = {
 		"git credential-store [options] <action>",
@@ -131,7 +131,7 @@ int main(int argc, const char **argv)
 
 	umask(077);
 
-	argc = parse_options(argc, argv, NULL, options, usage, 0);
+	argc = parse_options(argc, (const char **)argv, NULL, options, usage, 0);
 	if (argc != 1)
 		usage_with_options(usage, options);
 	op = argv[0];

fast-import.c

@@ -297,7 +297,7 @@ static int failure;
 static FILE *pack_edges;
 static unsigned int show_stats = 1;
 static int global_argc;
-static const char **global_argv;
+static char **global_argv;
 
 /* Memory pools */
 static size_t mem_pool_alloc = 2*1024*1024 - sizeof(struct mem_pool);
@@ -3347,7 +3347,7 @@ static void parse_argv(void)
 		read_marks();
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	unsigned int i;
 

git.c

@@ -507,8 +507,9 @@ static int run_argv(int *argcp, const char ***argv)
 }
 
 
-int main(int argc, const char **argv)
+int main(int argc, char **av)
 {
+	const char **argv = (const char **) av;
 	const char *cmd;
 
 	startup_info = &git_startup_info;

remote-testsvn.c

@@ -286,7 +286,7 @@ static int do_command(struct strbuf *line)
 	return 0;
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	struct strbuf buf = STRBUF_INIT, url_sb = STRBUF_INIT,
 			private_ref_sb = STRBUF_INIT, marksfilename_sb = STRBUF_INIT,

test-chmtime.c

@@ -56,7 +56,7 @@ static int timespec_arg(const char *arg, long int *set_time, int *set_eq)
 	return 1;
 }
 
-int main(int argc, const char *argv[])
+int main(int argc, char *argv[])
 {
 	static int verbose;
 

test-index-version.c

@@ -1,6 +1,6 @@
 #include "cache.h"
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	struct cache_header hdr;
 	int version;

test-mergesort.c

@@ -22,7 +22,7 @@ static int compare_strings(const void *a, const void *b)
 	return strcmp(x->text, y->text);
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	struct line *line, *p = NULL, *lines = NULL;
 	struct strbuf sb = STRBUF_INIT;

test-parse-options.c

@@ -29,7 +29,7 @@ static int number_callback(const struct option *opt, const char *arg, int unset)
 	return 0;
 }
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	const char *prefix = "prefix/";
 	const char *usage[] = {
@@ -81,7 +81,7 @@ int main(int argc, const char **argv)
 	};
 	int i;
 
-	argc = parse_options(argc, argv, prefix, options, usage, 0);
+	argc = parse_options(argc, (const char **)argv, prefix, options, usage, 0);
 
 	printf("boolean: %d\n", boolean);
 	printf("integer: %u\n", integer);

test-subprocess.c

@@ -1,7 +1,7 @@
 #include "cache.h"
 #include "run-command.h"
 
-int main(int argc, const char **argv)
+int main(int argc, char **argv)
 {
 	struct child_process cp;
 	int nogit = 0;
@@ -15,6 +15,6 @@ int main(int argc, const char **argv)
 	}
 	memset(&cp, 0, sizeof(cp));
 	cp.git_cmd = 1;
-	cp.argv = argv + 1;
+	cp.argv = (const char **)argv + 1;
 	return run_command(&cp);
 }