Define __PIC__ for darwin targets.

OKed by Mike Stump.

From-SVN: r103447

gcc/ChangeLog

+2005-08-24  Fariborz Jahanian <fjahanian@apple.com>
+
+	* config/darwin.h: define __PIC__
+	* config/rs6000/darwin.h: Add SUBTARGET_OS_CPP_BUILTINS to
+	TARGET_OS_CPP_BUILTINS macro.
+
 2005-08-24  Paolo Bonzini  <bonzini@gnu.org>
 
 	* config/rs6000/rs6000.md: Fix thinko in the peephole2 I added

gcc/config/darwin.h

@@ -140,6 +140,14 @@ Boston, MA 02110-1301, USA.  */
   { "-unexported_symbols_list", "-Zunexported_symbols_list" }, \
   SUBTARGET_OPTION_TRANSLATE_TABLE
 
+#define SUBTARGET_OS_CPP_BUILTINS()                     \
+  do							\
+    {							\
+      if (flag_pic)					\
+	builtin_define ("__PIC__");			\
+    }							\
+  while (0)
+
 /* These compiler options take n arguments.  */
 
 #undef  WORD_SWITCH_TAKES_ARG

gcc/config/rs6000/darwin.h

@@ -55,6 +55,7 @@
       builtin_define ("__POWERPC__");           \
       builtin_define ("__NATURAL_ALIGNMENT__"); \
       darwin_cpp_builtins (pfile);		\
+      SUBTARGET_OS_CPP_BUILTINS ();             \
     }                                           \
   while (0)
 

gcc/testsuite/gcc.dg/pic-macro-define.c

+/* { dg-do run { target "i?86-*-*-darwin" powerpc*-*-darwin* } } */
+/* { dg-options "-fPIC" } */
+
+#if defined __PIC__ 
+int main() {
+	return 0;
+}
+#else
+  error "NO __PIC__ DEFINED"	
+#endif