vax.h (ASM_SPEC): Pass `-J' to assembler.

        * vax.h (ASM_SPEC): Pass `-J' to assembler.
        * x-vax-gcc: New file for bootstrapping with gcc.
        * x-vax: Use X_CFLAGS rather than X_CPPFLAGS to pass `-J'.
        * configure.in: Use x-vax-gcc with gcc.
        * configure: Rebuilt.

From-SVN: r35894

gcc/config/vax/vax.h

@@ -24,6 +24,10 @@ Boston, MA 02111-1307, USA.  */
 
 #define CPP_PREDEFINES "-Dvax -D__vax__ -Dunix -Asystem(unix) -Asystem(bsd) -Acpu(vax) -Amachine(vax)"
 
+/* Use -J option for long branch support with Unix assembler. */
+
+#define ASM_SPEC "-J"
+
 /* If using g-format floating point, alter math.h.  */
 
 #define	CPP_SPEC "%{mg:%{!ansi:-DGFLOAT} -D__GFLOAT}"

gcc/config/vax/x-vax

-# If compiling GCC with the Unix assembler, -J will handle a large function.
-# With GAS, it should have no effect.
-X_CPPFLAGS = -J
+# If compiling GCC with the Unix compiler and assembler, -J will handle
+# functions with branch instructions longer than 32k bytes.  The Unix
+# compiler passes the -J argument onto the assembler.  The Unix assembler
+# requires it to resolve jumps when byte-displacement branches are
+# insufficient.  GAS ignores -J but automatically extends branches as
+# necessary.  GCC ignores -J as well (warning).  Thus, another mechanism
+# is needed to pass -J when using GCC.  The -Wa,-J option can't be used
+# directly since it is not compatible with the Unix compiler.  The current
+# solution is to use ASM_SPEC to pass -J to the assembler.
+X_CFLAGS = -J

gcc/configure.in

@@ -3670,6 +3670,10 @@ changequote([,])dnl
 		;;
 	vax-*-ultrix*)			# vaxen running ultrix
 		tm_file="${tm_file} vax/ultrix.h"
+		if test x$GCC = xyes
+		then
+			xmake_file=vax/x-vax-gcc
+		fi
 		use_collect2=yes
 		float_format=vax
 		;;