Add the GC commandline options and throw errors if they are used

llvm-svn: 257907

5 files changed, 67 insertions, 0 deletions

diff --git a/lld/lib/Driver/DarwinLdDriver.cpp b/lld/lib/Driver/DarwinLdDriver.cpp
index 40fad74c952..984958c905c 100644
--- a/lld/lib/Driver/DarwinLdDriver.cpp
+++ b/lld/lib/Driver/DarwinLdDriver.cpp
@@ -673,6 +673,22 @@ bool DarwinLdDriver::parse(llvm::ArrayRef<const char *> args,
     }
   }
 
+  // Handle obsolete ObjC options: -objc_gc_compaction, -objc_gc, -objc_gc_only
+  if (parsedArgs.getLastArg(OPT_objc_gc_compaction)) {
+    diagnostics << "error: -objc_gc_compaction is not supported\n";
+    return false;
+  }
+
+  if (parsedArgs.getLastArg(OPT_objc_gc)) {
+    diagnostics << "error: -objc_gc is not supported\n";
+    return false;
+  }
+
+  if (parsedArgs.getLastArg(OPT_objc_gc_only)) {
+    diagnostics << "error: -objc_gc_only is not supported\n";
+    return false;
+  }
+
   // Handle -pie or -no_pie
   if (llvm::opt::Arg *pie = parsedArgs.getLastArg(OPT_pie, OPT_no_pie)) {
     switch (ctx.outputMachOType()) {
diff --git a/lld/lib/Driver/DarwinLdOptions.td b/lld/lib/Driver/DarwinLdOptions.td
index cbf6ac1d4a4..2fad19cc2d5 100644
--- a/lld/lib/Driver/DarwinLdOptions.td
+++ b/lld/lib/Driver/DarwinLdOptions.td
@@ -205,3 +205,9 @@ def single_module : Flag<["-"], "single_module">,
      HelpText<"Default for dylibs">, Group<grp_obsolete>;
 def multi_module : Flag<["-"], "multi_module">,
      HelpText<"Unsupported way to build dylibs">, Group<grp_obsolete>;
+def objc_gc_compaction : Flag<["-"], "objc_gc_compaction">,
+     HelpText<"Unsupported ObjC GC option">, Group<grp_obsolete>;
+def objc_gc : Flag<["-"], "objc_gc">,
+     HelpText<"Unsupported ObjC GC option">, Group<grp_obsolete>;
+def objc_gc_only : Flag<["-"], "objc_gc_only">,
+     HelpText<"Unsupported ObjC GC option">, Group<grp_obsolete>;
diff --git a/lld/test/darwin/cmdline-objc_gc.objtxt b/lld/test/darwin/cmdline-objc_gc.objtxt
new file mode 100644
index 00000000000..b5225a1d184
--- /dev/null
+++ b/lld/test/darwin/cmdline-objc_gc.objtxt
@@ -0,0 +1,15 @@
+# RUN: not lld -flavor darwin -arch x86_64 -objc_gc %s 2>&1 | FileCheck %s
+#
+# Test that the -objc_gc is rejected.
+#
+
+# CHECK: error: -objc_gc is not supported
+
+--- !native
+defined-atoms:
+    - name:              _main
+      type:              code
+      scope:             global
+      content:           [ 0x90 ]
+
+...
diff --git a/lld/test/darwin/cmdline-objc_gc_compaction.objtxt b/lld/test/darwin/cmdline-objc_gc_compaction.objtxt
new file mode 100644
index 00000000000..acf7183d95e
--- /dev/null
+++ b/lld/test/darwin/cmdline-objc_gc_compaction.objtxt
@@ -0,0 +1,15 @@
+# RUN: not lld -flavor darwin -arch x86_64 -objc_gc_compaction %s 2>&1 | FileCheck %s
+#
+# Test that the -objc_gc_compaction is rejected.
+#
+
+# CHECK: error: -objc_gc_compaction is not supported
+
+--- !native
+defined-atoms:
+    - name:              _main
+      type:              code
+      scope:             global
+      content:           [ 0x90 ]
+
+...
diff --git a/lld/test/darwin/cmdline-objc_gc_only.objtxt b/lld/test/darwin/cmdline-objc_gc_only.objtxt
new file mode 100644
index 00000000000..db1cef94ea5
--- /dev/null
+++ b/lld/test/darwin/cmdline-objc_gc_only.objtxt
@@ -0,0 +1,15 @@
+# RUN: not lld -flavor darwin -arch x86_64 -objc_gc_only %s 2>&1 | FileCheck %s
+#
+# Test that the -objc_gc_only is rejected.
+#
+
+# CHECK: error: -objc_gc_only is not supported
+
+--- !native
+defined-atoms:
+    - name:              _main
+      type:              code
+      scope:             global
+      content:           [ 0x90 ]
+
+...