[patch] PR target/54160: Only set __OBJC2__ when compiling OBJC.

[Aldy Hernandez]

Adjusted ChangeLog entry as suggested by Jakub on IRC.

OK?
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commit ddc4494409331e5a75814a6c8a57aa0646257fb2
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Wed Dec 5 08:38:10 2012 -0600

    	PR target/54160
    	* config/t-darwin (darwin-c.o): Depend on $(CPP_INTERNAL_H).
    	* config/darwin-c.c (darwin_cpp_builtins): Only set __OBJC2__
    	* when
    	in obj mode.
    	Include libcpp/internal.h.

diff --git a/gcc/config/darwin-c.c b/gcc/config/darwin-c.c
index 8e48c30..ec8aa9c 100644
--- a/gcc/config/darwin-c.c
+++ b/gcc/config/darwin-c.c
@@ -38,6 +38,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "c-family/c-target.h"
 #include "c-family/c-target-def.h"
 #include "cgraph.h"
+#include "../../libcpp/internal.h"
 
 /* Pragmas.  */
 
@@ -632,7 +633,7 @@ darwin_cpp_builtins (cpp_reader *pfile)
       builtin_define ("__weak=");
     }
 
-  if (flag_objc_abi == 2)
+  if (CPP_OPTION (pfile, objc) && flag_objc_abi == 2)
     builtin_define ("__OBJC2__");
 }
 
diff --git a/gcc/config/t-darwin b/gcc/config/t-darwin
index e2bd74d..0e8346b 100644
--- a/gcc/config/t-darwin
+++ b/gcc/config/t-darwin
@@ -29,7 +29,7 @@ darwin.o: $(srcdir)/config/darwin.c $(CONFIG_H) $(SYSTEM_H) coretypes.h     \
 
 darwin-c.o: $(srcdir)/config/darwin-c.c $(CONFIG_H) $(SYSTEM_H) coretypes.h \
   $(TM_H) $(CPPLIB_H) $(TREE_H) $(C_PRAGMA_H) $(TM_P_H) \
-  incpath.h flags.h $(C_COMMON_H) $(C_TARGET_H) $(C_TARGET_DEF_H)
+  incpath.h flags.h $(C_COMMON_H) $(C_TARGET_H) $(C_TARGET_DEF_H) $(CPP_INTERNAL_H)
 	$(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
 		$(srcdir)/config/darwin-c.c $(PREPROCESSOR_DEFINES)