Add -Wobsolete to RGBFIX and RGBGFX, and deprecate rgbfix -O

contrib/bash_compl/_rgbfix.bash

@@ -145,6 +145,7 @@ _rgbfix_completions() {
 		warning)
 			mapfile -t COMPREPLY < <(compgen -W "
 				mbc
+				obsolete
 				overwrite
 				sgb
 				truncation

contrib/bash_compl/_rgbgfx.bash

@@ -157,6 +157,7 @@ _rgbgfx_completions() {
 		warning)
 			mapfile -t COMPREPLY < <(compgen -W "
 				embedded
+				obsolete
 				trim-nonempty
 				all
 				everything

contrib/zsh_compl/_rgbfix

@@ -42,6 +42,7 @@ _rgbfix_warnings() {
 		'everything:Enable literally everything'
 
 		'mbc:Warn about issues with MBC specs'
+		'obsolete:Warn when using deprecated features'
 		'overwrite:Warn when overwriting non-zero bytes'
 		'sgb:Warn when SGB flag conflicts with old licensee code'
 		'truncation:Warn when values are truncated to fit'

contrib/zsh_compl/_rgbgfx

@@ -17,6 +17,7 @@ _rgbgfx_warnings() {
 		'everything:Enable literally everything'
 
 		'embedded:Warn when using embedded PLTE without "-c embedded"'
+		'obsolete:Warn when using deprecated features'
 		'trim-nonempty:Warn when "-x" trims nonempty tiles'
 	)
 	_describe warning warnings

include/fix/warning.hpp

@@ -13,6 +13,7 @@ enum WarningLevel {
 
 enum WarningID {
 	WARNING_MBC,        // Issues with MBC specs
+	WARNING_OBSOLETE,   // Obsolete/deprecated things
 	WARNING_OVERWRITE,  // Overwriting non-zero bytes
 	WARNING_SGB,        // SGB flag conflicts with old licensee code
 	WARNING_TRUNCATION, // Truncating values to fit

include/gfx/warning.hpp

@@ -13,6 +13,7 @@ enum WarningLevel {
 
 enum WarningID {
 	WARNING_EMBEDDED,      // Using an embedded PNG palette without '-c embedded'
+	WARNING_OBSOLETE,      // Obsolete/deprecated things
 	WARNING_TRIM_NONEMPTY, // '-x' trims nonempty tiles
 
 	NB_PLAIN_WARNINGS,

man/rgbfix.1

@@ -8,7 +8,7 @@
 .Nd Game Boy header utility and checksum fixer
 .Sh SYNOPSIS
 .Nm
-.Op Fl hjOsVvw
+.Op Fl hjsVvw
 .Op Fl C | c
 .Op Fl \-color Ar when
 .Op Fl f Ar fix_spec
@@ -149,9 +149,6 @@ section below.
 Set the ROM version
 .Pq Ad 0x14C
 to a given value from 0 to 0xFF.
-.It Fl O , Fl \-overwrite
-Alias for
-.Fl Wno-overwrite .
 .It Fl o Ar out_file , Fl \-output Ar out_file
 Write the modified ROM image to the given file, or '-' to write to standard output.
 If not specified, the input files are modified in-place, or written to standard output if read from standard input.
@@ -253,6 +250,8 @@ prefix, entries are listed alphabetically.
 .Bl -tag -width Ds
 .It Fl Wno-mbc
 Warn when there are inconsistencies with or caveats about the specified MBC type.
+.It Fl Wno-obsolete
+Warn when obsolete features are encountered, which have been deprecated and may later be removed.
 .It Fl Wno-overwrite
 Warn when overwriting different non-zero bytes in the header.
 .It Fl Wno-sgb

man/rgbgfx.1

@@ -810,6 +810,8 @@ Warn when a generated palette is sorted according to the input PNG's embedded pa
 was not provided.
 This warning is enabled by
 .Fl Weverything .
+.It Fl Wno-obsolete
+Warn when obsolete features are encountered, which have been deprecated and may later be removed.
 .It Fl Wtrim-nonempty
 Warn when
 .Fl x

src/fix/main.cpp

@@ -778,6 +778,7 @@ int main(int argc, char *argv[]) {
 			break;
 
 		case 'O':
+			warning(WARNING_OBSOLETE, "'-O' is deprecated; use '-Wno-overwrite' instead");
 			warnings.processWarningFlag("no-overwrite");
 			break;
 

src/fix/warning.cpp

@@ -12,6 +12,7 @@ Diagnostics<WarningLevel, WarningID> warnings = {
     },
     .warningFlags = {
         {"mbc",        LEVEL_DEFAULT   },
+        {"obsolete",   LEVEL_DEFAULT   },
         {"overwrite",  LEVEL_DEFAULT   },
         {"sgb",        LEVEL_DEFAULT   },
         {"truncation", LEVEL_DEFAULT   },

src/gfx/warning.cpp

@@ -17,6 +17,7 @@ Diagnostics<WarningLevel, WarningID> warnings = {
     },
     .warningFlags = {
         {"embedded",      LEVEL_EVERYTHING},
+        {"obsolete",      LEVEL_DEFAULT   },
         {"trim-nonempty", LEVEL_ALL       },
     },
     .paramWarnings = {},

test/fix/overwrite.flags

@@ -1,2 +1,2 @@
--O -Cjv -t PM_CRYSTAL -i BYTE -n 0 -k 01 -l 0x33 -m 0x10 -r 3 -p 0
-Checks that the -O flag suppresses "Overwrote a non-zero byte" warnings from the rest
+-Wno-overwrite -Cjv -t PM_CRYSTAL -i BYTE -n 0 -k 01 -l 0x33 -m 0x10 -r 3 -p 0
+Checks that the -Wno-overwrite flag suppresses "Overwrote a non-zero byte" warnings from the rest