From f9a55bd5cd7b4bb0a4a1994ce339c38480fd5be5 Mon Sep 17 00:00:00 2001
From: Rangi42 <sylvie.oukaour+rangi42@gmail.com>
Date: Wed, 6 Aug 2025 10:19:01 -0400
Subject: [PATCH] Allow `OPT` to accept optional dashes before flags

---
 man/rgbasm.5     | 3 ++-
 src/asm/opt.cpp  | 3 +++
 test/asm/opt.asm | 4 ++--
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/man/rgbasm.5 b/man/rgbasm.5
index df22e187..0e43886e 100644
--- a/man/rgbasm.5
+++ b/man/rgbasm.5
@@ -2482,7 +2482,8 @@ can be used to change some of the options during assembling from within the sour
 takes a comma-separated list of options as its argument:
 .Bd -literal -offset indent
 PUSHO
-    OPT g.oOX, Wdiv       ; acts like command-line -g.oOX -Wdiv
+    OPT g.oOX, Wdiv       ; acts like command-line `-g.oOX -Wdiv`
+    OPT -Wdiv             ; dashes before the options are optional
     DW `..ooOOXX          ; uses the graphics constant characters from OPT g
     PRINTLN $80000000/-1  ; prints a warning about division
 POPO
diff --git a/src/asm/opt.cpp b/src/asm/opt.cpp
index 69e6de52..2d3ad05c 100644
--- a/src/asm/opt.cpp
+++ b/src/asm/opt.cpp
@@ -53,6 +53,9 @@ void opt_W(char const *flag) {
 }
 
 void opt_Parse(char const *s) {
+	if (s[0] == '-') {
+		++s;
+	}
 	switch (s[0]) {
 	case 'b':
 		if (strlen(&s[1]) == 2) {
diff --git a/test/asm/opt.asm b/test/asm/opt.asm
index ca32d8cb..fbe20b49 100644
--- a/test/asm/opt.asm
+++ b/test/asm/opt.asm
@@ -1,7 +1,7 @@
 SECTION "test", ROM0
 
 pusho
-	opt p42, Q.4, Wno-div
+	opt p42, -Q.4, Wno-div
 	ds 1
 	println $8000_0000 / -1
 	def n = 3.14
@@ -13,6 +13,6 @@ popo
 	def n = 3.14
 	println "{x:n} = {f:n}"
 
-pusho p99
+pusho -p99
 	ds 1
 popo