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Add flag -w to rgbasm to disable warnings

A lot of warnings are being added (and more will come) so it makes sense
to be able to disable them in legacy source that generates warnings but
is otherwise correct.

Signed-off-by: AntonioND <[email protected]>

--- a/include/asm/main.h

+++ b/include/asm/main.h

@@ -11,6 +11,7 @@

 	bool verbose;

 	bool haltnop;

 	bool exportall;

+	bool warnings; /* true to enable warnings, false to disable them. */

 	    //-1 == random

 };

--- a/src/asm/main.c

+++ b/src/asm/main.c

@@ -256,6 +256,9 @@

 void

 warning(const char *fmt, ...)

 {

+	if (!CurrentOptions.warnings)

+		return;

+

 	va_list args;

 	va_start(args, fmt);

@@ -312,12 +315,13 @@

 	DefaultOptions.verbose = false;

 	DefaultOptions.haltnop = true;

 	DefaultOptions.exportall = false;

+	DefaultOptions.warnings = true;

 	opt_SetCurrentOptions(&DefaultOptions);

 	newopt = CurrentOptions;

-	while ((ch = getopt(argc, argv, "b:D:g:hi:o:p:vE")) != -1) {

+	while ((ch = getopt(argc, argv, "b:D:g:hi:o:p:vEw")) != -1) {

 		switch (ch) {

 		case 'b':

 			if (strlen(optarg) == 2) {

@@ -366,6 +370,9 @@

 			break;

 		case 'E':

 			newopt.exportall = true;

+			break;

+		case 'w':

+			newopt.warnings = false;

 			break;

 		default:

 			usage();

--- a/src/asm/rgbasm.1

+++ b/src/asm/rgbasm.1

@@ -20,7 +20,7 @@

 .Nd Game Boy assembler

 .Sh SYNOPSIS

 .Nm rgbasm

-.Op Fl Ehv

+.Op Fl Ehvw

 .Op Fl b Ar chars

 .Op Fl D Ar name Ns Op = Ns Ar value

 .Op Fl g Ar chars

@@ -68,6 +68,8 @@

 The default is 0x00.

 .It Fl v

 Be verbose.

+.It Fl w

+Disable warning output.

 .El

 .Sh EXAMPLES

 Assembling a basic source file is simple: