[rl78] pass -mrelax to gas/ld

[DJ Delorie]

Committed.

	* config/rl78/rl78.opt (mrelax): New.
	* config/rl78/rl78.h (ASM_SPEC): New, pass on -mrelax to gas.
	* config/rl78/rl78.h (LINK_SPEC): New, pass on -mrelax to ld.

Index: config/rl78/rl78.h
===================================================================
--- config/rl78/rl78.h	(revision 202542)
+++ config/rl78/rl78.h	(working copy)
@@ -38,12 +38,22 @@
 #undef  STARTFILE_SPEC
 #define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s} crtbegin.o%s"
 
 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
 
+#undef  ASM_SPEC
+#define ASM_SPEC "\
+%{mrelax:-relax} \
+"
+
+#undef  LINK_SPEC
+#define LINK_SPEC "\
+%{mrelax:-relax} \
+"
+
 #undef  LIB_SPEC
 #define LIB_SPEC "					\
 --start-group						\
 -lc							\
 -lsim							\
 %{fprofile-arcs|fprofile-generate|coverage:-lgcov} 	\
Index: config/rl78/rl78.opt
===================================================================
--- config/rl78/rl78.opt	(revision 202542)
+++ config/rl78/rl78.opt	(working copy)
@@ -38,6 +38,10 @@ Enum(rl78_mul_types) String(none) Value(
 
 EnumValue
 Enum(rl78_mul_types) String(rl78) Value(MUL_RL78)
 
 EnumValue
 Enum(rl78_mul_types) String(g13) Value(MUL_G13)
+
+mrelax
+Target
+Enable assembler and linker relaxation.