Add 0/1/2 warning levels to rgblink -Wtruncation (#1816)

test/link/test.sh

@@ -439,6 +439,22 @@ rgblinkQuiet "$otemp" "$gbtemp" "$gbtemp2" "$outtemp" "$outtemp2" 2>"$outtemp3"
 tryDiff "$test"/out.err "$outtemp3"
 evaluateTest
 
+test="truncation/level1"
+startTest
+"$RGBASM" -o "$otemp" "$test"/a.asm
+continueTest
+rgblinkQuiet -Wtruncation=1 -o "$gbtemp" "$otemp" 2>"$outtemp"
+tryDiff "$test"/out.err "$outtemp"
+evaluateTest
+
+test="truncation/level2"
+startTest
+"$RGBASM" -o "$otemp" "$test"/a.asm
+continueTest
+rgblinkQuiet -Wtruncation=2 -o "$gbtemp" "$otemp" 2>"$outtemp"
+tryDiff "$test"/out.err "$outtemp"
+evaluateTest
+
 if [[ "$failed" -eq 0 ]]; then
 	echo "${bold}${green}All ${tests} tests passed!${rescolors}${resbold}"
 else

test/link/truncation/level1/a.asm

@@ -0,0 +1,6 @@
+section "rom", rom0
+ld bc, -wLabel
+ld de, -(wLabel * 2)
+
+section "ram", wram0
+wLabel::

test/link/truncation/level1/out.err

@@ -0,0 +1,2 @@
+warning: Value $fffe8000 (may be negative?) is not 16-bit [-Wtruncation]
+    at truncation/level1/a.asm(3)

test/link/truncation/level2/a.asm

@@ -0,0 +1,6 @@
+section "rom", rom0
+ld bc, -wLabel
+ld de, -(wLabel * 2)
+
+section "ram", wram0
+wLabel::

test/link/truncation/level2/out.err

@@ -0,0 +1,4 @@
+warning: Value $fffe8000 (may be negative?) is not 16-bit [-Wtruncation]
+    at truncation/level2/a.asm(3)
+warning: Value $ffff4000 (may be negative?) is not 16-bit [-Wtruncation]
+    at truncation/level2/a.asm(2)