Use __sparc__ rather than sparc. (Bug#507.)

src/ChangeLog

+2008-07-08  Glenn Morris  <rgm@gnu.org>
+
+	* m/sparc.h: Define __sparc__ rather than sparc.  (Bug#507.)
+	* alloc.c, ecrt0.c: Use __sparc__ rather than sparc.
+
 2008-07-07  Chong Yidong  <cyd@stupidchicken.com>
 
 	* frame.c (Qinhibit_face_set_after_frame_default): Var deleted.

src/alloc.c

@@ -4487,7 +4487,7 @@ mark_stack ()
   /* Fixme: Code in the Boehm GC suggests flushing (with `flushrs') is
      needed on ia64 too.  See mach_dep.c, where it also says inline
      assembler doesn't work with relevant proprietary compilers.  */
-#ifdef sparc
+#ifdef __sparc__
   asm ("ta 3");
 #endif
 

src/ecrt0.c

@@ -200,7 +200,7 @@ start1 (ignore, argc, xargv)
 
 #endif /* not CRT0_DUMMIES */
 
-#ifdef sparc
+#ifdef __sparc__
 asm (".global __start");
 asm (".text");
 asm ("__start:");
@@ -218,7 +218,7 @@ asm ("	sub	%sp, 24, %sp");
 asm ("	call	__exit");
 asm ("	nop");
 
-#endif /* sparc */
+#endif /* __sparc__ */
 
 #if __FreeBSD__ == 2
 char *__progname;

src/m/sparc.h

@@ -36,10 +36,10 @@ NOTE-END  */
 
 #define NO_ARG_ARRAY
 
-/* Say this machine is a sparc */
+/* Say this machine is a sparc.  Probably already defined.  */
 
-#ifndef sparc
-#define sparc
+#ifndef __sparc__
+#define __sparc__
 #endif
 
 /* Use type int rather than a union, to represent Lisp_Object */