Fix alpha OSF 1.x/2.x/3.x build problems.

	* alpha.h (ARCH_ASM_FILE_START): Define.
	(ASM_FILE_START): Use ARCH_ASM_FILE_START.
	* osf12.h, osf2or3.h (ARCH_ASM_FILE_START): Redefine to null string.

From-SVN: r14884

gcc/ChangeLog

+Thu Aug 21 17:28:00 1997  Jim Wilson  <wilson@cygnus.com>
+
+	* alpha.h (ARCH_ASM_FILE_START): Define.
+	(ASM_FILE_START): Use ARCH_ASM_FILE_START.
+	* osf12.h, osf2or3.h (ARCH_ASM_FILE_START): Redefine to null string.
+
 Thu Aug 21 10:22:19 1997  Jeffrey A Law  (law@cygnus.com)
 
 	* version.c: Bump for new snapshot.

gcc/config/alpha/alpha.h

@@ -1716,6 +1716,14 @@ extern void final_prescan_insn ();
 
 /* Control the assembler format that we output.  */
 
+/* Emit the .arch pseudo op.  This is separated out, because versions of
+   OSF before 4.0 do not support it.  */
+
+#define ARCH_ASM_FILE_START(FILE)				\
+  fprintf (FILE, "\t.arch %s\n",				\
+	   (TARGET_BYTE_OPS ? "ev56"				\
+	    : alpha_cpu == PROCESSOR_EV4 ? "ev4" : "ev5"));
+
 /* Output at beginning of assembler file.  */
 
 #define ASM_FILE_START(FILE)					\
@@ -1724,9 +1732,7 @@ extern void final_prescan_insn ();
   fprintf (FILE, "\t.set noreorder\n");				\
   fprintf (FILE, "\t.set volatile\n");                          \
   fprintf (FILE, "\t.set noat\n");				\
-  fprintf (FILE, "\t.arch %s\n",				\
-	   (TARGET_BYTE_OPS ? "ev56"				\
-	    : alpha_cpu == PROCESSOR_EV4 ? "ev4" : "ev5"));	\
+  ARCH_ASM_FILE_START (FILE);					\
   ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename);	\
 }
 

gcc/config/alpha/osf12.h

@@ -31,3 +31,7 @@ Boston, MA 02111-1307, USA.  */
 #define WCHAR_TYPE "short unsigned int"
 #undef WCHAR_TYPE_SIZE
 #define WCHAR_TYPE_SIZE 16
+
+/* The .arch pseudo op is not supported.  */
+#undef ARCH_ASM_FILE_START
+#define ARCH_ASM_FILE_START(FILE)

gcc/config/alpha/osf2or3.h

@@ -21,4 +21,8 @@ Boston, MA 02111-1307, USA.  */
 /* In OSF 2 or 3, linking with -lprof1 doesn't require -lpdf.  */
 
 #undef LIB_SPEC
+
+/* The .arch pseudo op is not supported.  */
+#undef ARCH_ASM_FILE_START
+#define ARCH_ASM_FILE_START(FILE)
 #define LIB_SPEC "%{p:-lprof1} %{pg:-lprof1} %{a:-lprof2} -lc"