darwin.h (CPP_SPEC): Handle -pthread, transforming it into -D_REENTRANT.

	* config/darwin.h (CPP_SPEC): Handle -pthread, transforming
	it into -D_REENTRANT.

From-SVN: r118408

gcc/ChangeLog

 2006-11-01  Roger Sayle  <roger@eyesopen.com>
 
+	* config/darwin.h (CPP_SPEC): Handle -pthread, transforming
+	it into -D_REENTRANT.
+
+2006-11-01  Roger Sayle  <roger@eyesopen.com>
+
 	* configure.ac (HAVE_AS_IX86_DIFF_SECT_DELTA): New test to determine
 	whether the assembler supports taking the difference of symbols in
 	different sections.  On x86/Solaris, GAS does but Solaris as doesn't.

gcc/config/darwin.h

@@ -217,7 +217,8 @@ extern GTY(()) int darwin_ms_struct;
    them to darwin_cpp_builtins in darwin-c.c.  */
 
 #undef	CPP_SPEC
-#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}"
+#define CPP_SPEC "%{static:%{!dynamic:-D__STATIC__}}%{!static:-D__DYNAMIC__}" \
+	" %{pthread:-D_REENTRANT}"
 
 /* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
    precomp, libtool, and fat build additions.  Also we