[PECOFF] Ignore /debug option.

llvm-svn: 191268

lld/lib/Driver/WinLinkDriver.cpp

@@ -406,6 +406,12 @@ bool WinLinkDriver::parse(int argc, const char *argv[], PECOFFLinkingContext &ct
       ctx.appendInputSearchPath(ctx.allocateString(inputArg->getValue()));
       break;
 
+    case OPT_debug:
+      // LLD is not yet capable of creating a PDB file, so /debug does not have
+      // any effect, other than disabling dead stripping.
+      ctx.setDeadStripping(false);
+      break;
+
     case OPT_force:
     case OPT_force_unresolved:
       // handle /force or /force:unresolved. We do not currently support

lld/lib/Driver/WinLinkOptions.td

@@ -40,6 +40,8 @@ def incl_c : Separate<["/", "-"], "include">, Alias<incl>;
 
 def nodefaultlib_all : F<"nodefaultlib">;
 
+def debug : F<"debug">;
+
 def force : F<"force">,
     HelpText<"Allow undefined symbols when creating executables">;
 def force_unresolved : F<"force:unresolved">;

lld/unittests/DriverTests/WinLinkDriverTest.cpp

@@ -304,6 +304,11 @@ TEST_F(WinLinkParserTest, NoAllowIsolation) {
   EXPECT_FALSE(_context.getAllowIsolation());
 }
 
+TEST_F(WinLinkParserTest, Debug) {
+  EXPECT_FALSE(parse("link.exe", "/debug", "a.out", nullptr));
+  EXPECT_FALSE(_context.deadStrip());
+}
+
 TEST_F(WinLinkParserTest, Fixed) {
   EXPECT_FALSE(parse("link.exe", "/fixed", "a.out", nullptr));
   EXPECT_FALSE(_context.getBaseRelocationEnabled());