sim: bfin: fix up linux-fixed-code.h generation [PR sim/10143]

The use of $< ends up picking the wrong object out of the depend
list.  Specify the input name directly to avoid fragility.

On BSD systems, we need to make sure all options come before the
non-options (i.e. the files).

Reported-by: Chris Johns <chrisj@rtems.org>
URL: https://sourceware.org/bugzilla/show_bug.cgi?id=13160

sim/bfin/ChangeLog

@@ -1,3 +1,10 @@
+2015-03-08  Mike Frysinger  <vapier@gentoo.org>
+
+	PR sim/10143
+	* Makefile.in ($(srcdir)/linux-fixed-code.h): Specify the asm input
+	directly rather than use $<.  Move the file name to the end of the
+	sed command to be POSIX compliant.
+
 2014-08-19  Alan Modra  <amodra@gmail.com>
 
 	* configure: Regenerate.

sim/bfin/Makefile.in

@@ -50,15 +50,16 @@ SIM_EXTRA_LIBS = @SDL_LIBS@ -lm
 ## COMMON_POST_CONFIG_FRAG
 
 $(srcdir)/linux-fixed-code.h: @MAINTAINER_MODE_TRUE@ $(srcdir)/linux-fixed-code.s Makefile.in
-	$(AS_FOR_TARGET) $< -o linux-fixed-code.o
+	$(AS_FOR_TARGET) $(srcdir)/linux-fixed-code.s -o linux-fixed-code.o
 	(	set -e; \
 		echo "/* DO NOT EDIT: Autogenerated from linux-fixed-code.s.  */"; \
 		echo "static const unsigned char bfin_linux_fixed_code[] ="; \
 		echo "{"; \
 		$(OBJDUMP_FOR_TARGET) -d -z linux-fixed-code.o > $@.dis; \
-		sed -n $@.dis \
+		sed -n \
 			-e 's:^[^	]*	:0x:' \
-			-e '/^0x/{s:	.*::;s: *$$:,:;s: :, 0x:g;p}'; \
+			-e '/^0x/{s:	.*::;s: *$$:,:;s: :, 0x:g;p}' \
+			$@.dis; \
 		rm -f $@.dis; \
 		echo "};" \
 	) > $@.tmp