Implement warning diagnostic flags for RGBLINK (#1754)

contrib/bash_compl/_rgblink.bash

@@ -21,6 +21,7 @@ _rgblink_completions() {
 		[O]="overlay:glob-*.gb *.gbc *.sgb"
 		[o]="output:glob-*.gb *.gbc *.sgb"
 		[p]="pad:unk"
+		[W]="warning:warning"
 	)
 	# Parse command-line up to current word
 	local opt_ena=true
@@ -136,6 +137,18 @@ _rgblink_completions() {
 	case "$state" in
 		unk) # Return with no replies: no idea what to complete!
 			;;
+		warning)
+			mapfile -t COMPREPLY < <(compgen -W "
+				assert
+				div
+				obsolete
+				shift
+				shift-amount
+				truncation
+				all
+				everything
+				error" -P "${cur_word:0:$optlen}" -- "${cur_word:$optlen}")
+			;;
 		normal) # Acts like a glob...
 			state="glob-*.o *.obj"
 			;&

contrib/zsh_compl/_rgbasm

@@ -23,7 +23,7 @@ _rgbasm_warnings() {
 		'obsolete:Warn when using deprecated features'
 		'purge:Warn when purging exported symbols or labels'
 		'shift:Warn when shifting negative values'
-		'shift-amount:Warn when a shift'\''s operand it negative or \> 32'
+		'shift-amount:Warn when a shift'\''s operand is negative or \> 32'
 		'truncation:Warn when implicit truncation loses bits'
 		'unmapped-char:Warn on unmapped character'
 		'unmatched-directive:Warn on unmatched directive pair'

contrib/zsh_compl/_rgblink

@@ -1,5 +1,22 @@
 #compdef rgblink
 
+_rgblink_warnings() {
+	local warnings=(
+		'error:Turn all warnings into errors'
+
+		'all:Enable most warning messages'
+		'everything:Enable literally everything'
+
+		'assert:Warn when WARN-type asserts fail'
+		'div:Warn when dividing the smallest int by -1'
+		'obsolete:Warn when using deprecated features'
+		'shift:Warn when shifting negative values'
+		'shift-amount:Warn when a shift'\''s operand is negative or \> 32'
+		'truncation:Warn when implicit truncation loses bits'
+	)
+	_describe warning warnings
+}
+
 local args=(
 	# Arguments are listed here in the same order as in the manual, except for the version and help
 	'(- : * options)'{-V,--version}'[Print version number and exit]'
@@ -19,6 +36,7 @@ local args=(
 	'(-o --output)'{-o,--output}"+[Write ROM image to this file]:rom file:_files -g '*.{gb,sgb,gbc}'"
 	'(-p --pad-value)'{-p,--pad-value}'+[Set padding byte]:padding byte:'
 	'(-S --scramble)'{-s,--scramble}'+[Activate scrambling]:scramble spec'
+	'(-W --warning)'{-W,--warning}'+[Toggle warning flags]:warning flag:_rgblink_warnings'
 
 	'*'":object files:_files -g '*.o'"
 )