[SV 42249] Propagate correct rule status results.

* remake.c (update_file, update_file_1, check_dep): Return an enum
  update_status value instead of an int, and keep the highest value we
  find as we walk the graph so that the ultimate status is correct.
* tests/scripts/options/dash-q: Add a test for updating prerequisites.

tests/scripts/options/dash-q

@@ -5,21 +5,21 @@ $details = "Try various uses of -q and ensure they all give the correct results.
 
 # TEST 0
 
-run_make_test('
+run_make_test(qq!
 one:
 two: ;
 three: ; :
-four: ; $(.XY)
-five: ; \
- $(.XY)
-six: ; \
- $(.XY)
-	$(.XY)
-seven: ; \
- $(.XY)
-	: foo
-	$(.XY)
-',
+four: ; \$(.XY)
+five: ; \\
+ \$(.XY)
+six: ; \\
+ \$(.XY)
+\t\$(.XY)
+seven: ; \\
+ \$(.XY)
+\t: foo
+\t\$(.XY)
+!,
               '-q one', '');
 
 # TEST 1
@@ -54,4 +54,24 @@ one:: ; @echo two
 ',
               '-q', '', 256);
 
+# TEST 7 : Savannah bug # 42249
+# Make sure we exit with 1 even for prerequisite updates
+run_make_test('
+build-stamp: ; echo $@
+build-arch: build-stamp
+build-x: build-arch
+build-y: build-x
+',
+              '-q build-y', '', 256);
+
+# TEST 8
+# Make sure we exit with 2 on error even with -q
+run_make_test('
+build-stamp: ; echo $@
+build-arch: build-stamp-2
+build-x: build-arch
+build-y: build-x
+',
+              '-q build-y', "#MAKE#: *** No rule to make target 'build-stamp-2', needed by 'build-arch'.  Stop.\n", 512);
+
 1;