Enable -fleading-underscore for arm-elf builds.

From-SVN: r24409

gcc/ChangeLog

+Wed Dec 23 10:27:44 1998  Nick Clifton  <nickc@cygnus.com>
+
+	* config/arm/t-arm-elf: Add multiplib option for leading
+	underscores.
+
+	* config/arm/thumb.h (ASM_OUTPUT_LABELREF): Use variable
+        'user_label_prefix' rather than macro USER_LABEL_PREFIX.
+
+	(thumb_shiftable_const): Use macro 'BASE_REG_CLASS' rather
+	than variable 'reload_address_base_reg_class'.  [Note this
+	change is unrelated to the others in this patch].
+
+	* config/arm/unknown-elf.h (USER_LABEL_PREFIX): Default to no
+        leading underscore.
+
 Wed Dec 23 09:51:32 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* alias.c (record_alias_subset): Remove ignored `&'.

gcc/config/arm/lib1funcs.asm

@@ -47,6 +47,15 @@ Boston, MA 02111-1307, USA.  */
 #error  __USER_LABEL_PREFIX__ not defined
 #endif
 
+/* ANSI concatenation macros.  */
+
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels.  */
+
+#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+
 #ifdef __elf__
 #define __PLT__ (PLT)
 #define TYPE(x) .type SYM(x),function
@@ -57,15 +66,6 @@ Boston, MA 02111-1307, USA.  */
 #define SIZE(x)
 #endif
 
-/* ANSI concatenation macros.  */
-
-#define CONCAT1(a, b) CONCAT2(a, b)
-#define CONCAT2(a, b) a ## b
-
-/* Use the right prefix for global labels.  */
-
-#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
-
 #ifdef L_udivsi3
 
 dividend	.req	r0

gcc/config/arm/t-arm-elf

@@ -23,8 +23,8 @@ dp-bit.c: $(srcdir)/config/fp-bit.c
 	echo '#endif' >> dp-bit.c
 	cat $(srcdir)/config/fp-bit.c >> dp-bit.c
 
-MULTILIB_OPTIONS  = mlittle-endian/mbig-endian mhard-float/msoft-float mapcs-32/mapcs-26
-MULTILIB_DIRNAMES = le be fpu soft 32bit 26bit
+MULTILIB_OPTIONS  = mlittle-endian/mbig-endian mhard-float/msoft-float mapcs-32/mapcs-26 fno-leading-underscore/fleading-underscore
+MULTILIB_DIRNAMES = le be fpu soft 32bit 26bit elf under
 MULTILIB_MATCHES  = 
 
 LIBGCC = stmp-multilib

gcc/config/arm/thumb.h

@@ -161,7 +161,7 @@ extern int target_flags;
 
 /* Output a reference to a label.  */
 #define ASM_OUTPUT_LABELREF(STREAM,NAME)  \
-  fprintf ((STREAM), "%s%s", USER_LABEL_PREFIX, (NAME))
+  fprintf ((STREAM), "%s%s", user_label_prefix, (NAME))
 
 /* This is how to output an assembler line for a numeric constant byte.  */
 #define ASM_OUTPUT_BYTE(STREAM,VALUE)					\
@@ -977,7 +977,7 @@ int thumb_shiftable_const ();
       rtx orig_X = X;							\
       X = copy_rtx (X);							\
       push_reload (orig_X, NULL_RTX, &X, NULL_PTR,			\
-		   reload_address_base_reg_class,			\
+		   BASE_REG_CLASS,					\
 		   Pmode, VOIDmode, 0, 0, OPNUM, TYPE);			\
       goto WIN;								\
     }									\

gcc/config/arm/unknown-elf.h

@@ -40,7 +40,7 @@ Boston, MA 02111-1307, USA.  */
 
 #define ENDFILE_SPEC	"crtend%O%s"
 
-#define USER_LABEL_PREFIX 	"_"	/* FIXME: This ought to be "" */
+#define USER_LABEL_PREFIX 	""
 #define LOCAL_LABEL_PREFIX 	"."
 
 #define TEXT_SECTION "		.text"