Add LangOptions::NeXTRuntime.
 - Wired to -fnext-runtime and -fgnu-runtime options.
 - Defaults to GNU, no autoselection for NeXT.

Emit NeXT OBJC_IMAGE_INFO marker.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54651 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 214dfb1..bc35d7f 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -53,7 +53,7 @@
     Define(Defs, "linux");
 #endif
     
-    if (1) {// -fobjc-gc controls this.
+    if (1) { // FIXME: -fobjc-gc controls this.
       Define(Defs, "__weak", "");
       Define(Defs, "__strong", "");
     } else {
@@ -67,6 +67,9 @@
     
     if (0)  // darwin_pascal_strings
       Define(Defs, "__PASCAL_STRINGS__");
+
+    if (0) // FIXME: -fnext-runtime controls this
+      Define(Defs, "__NEXT_RUNTIME__");
   }
 
 };