alpha.h (TARGET_SWITCHES): Turn on MASK_EXPLICIT_RELOCS if the assembler supports it.

        * config/alpha/alpha.h (TARGET_SWITCHES): Turn on
        MASK_EXPLICIT_RELOCS if the assembler supports it.
        * configure.in (HAVE_AS_EXPLICIT_RELOCS): New.
        * configure, config.in: Rebuild.

From-SVN: r48054

gcc/ChangeLog

+2001-12-15  Richard Henderson  <rth@redhat.com>
+
+	* config/alpha/alpha.h (TARGET_SWITCHES): Turn on
+	MASK_EXPLICIT_RELOCS if the assembler supports it.
+	* configure.in (HAVE_AS_EXPLICIT_RELOCS): New.
+	* configure, config.in: Rebuild.
+	
 Sat Dec 15 17:53:03 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* calls.c (emit_call_1): If ECF_SP_DEPRESSED, pretend have adjusted

gcc/config.in

@@ -526,6 +526,9 @@
 /* Define if your assembler supports marking sections with SHF_MERGE flag. */
 #undef HAVE_GAS_SHF_MERGE
 
+/* Define if your assembler supports explicit relocations. */
+#undef HAVE_AS_EXPLICIT_RELOCS
+
 /* Define if your assembler supports .register. */
 #undef HAVE_AS_REGISTER_PSEUDO_OP
 

gcc/config/alpha/alpha.h

@@ -251,7 +251,8 @@ extern enum alpha_fp_trap_mode alpha_fptm;
      N_("Emit 16-bit relocations to the small data areas")},		\
     {"large-data", -MASK_SMALL_DATA,					\
      N_("Emit 32-bit relocations to the small data areas")},		\
-    {"", TARGET_DEFAULT | TARGET_CPU_DEFAULT, ""} }
+    {"", TARGET_DEFAULT | TARGET_CPU_DEFAULT				\
+	 | TARGET_DEFAULT_EXPLICIT_RELOCS, ""} }
 
 #define TARGET_DEFAULT MASK_FP|MASK_FPREGS
 
@@ -259,6 +260,14 @@ extern enum alpha_fp_trap_mode alpha_fptm;
 #define TARGET_CPU_DEFAULT 0
 #endif
 
+#ifndef TARGET_DEFAULT_EXPLICIT_RELOCS
+#ifdef HAVE_AS_EXPLICIT_RELOCS
+#define TARGET_DEFAULT_EXPLICIT_RELOCS MASK_EXPLICIT_RELOCS
+#else
+#define TARGET_DEFAULT_EXPLICIT_RELOCS 0
+#endif
+#endif
+
 /* This macro is similar to `TARGET_SWITCHES' but defines names of
    command options that have values.  Its definition is an initializer
    with a subgrouping for each command option.

gcc/configure.in

@@ -1623,6 +1623,48 @@ fi
 AC_MSG_RESULT($gcc_cv_as_shf_merge)
 
 case "$target" in
+  # All TARGET_ABI_OSF targets.
+  alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
+    AC_CACHE_CHECK([assembler supports explicit relocations],
+	gcc_cv_as_explicit_relocs, [
+	gcc_cv_as_explicit_relocs=unknown
+	if test x$gcc_cv_gas_major_version != x \
+		-a x$gcc_cv_gas_minor_version != x
+	then
+	   if test "$gcc_cv_gas_major_version" -eq 2 \
+	           -a "$gcc_cv_gas_minor_version" -ge 12 \
+	           -o "$gcc_cv_gas_major_version" -gt 2; then
+	      gcc_cv_as_explicit_relocs=yes
+	   fi
+	elif test x$gcc_cv_as != x; then
+	    cat > conftest.s << 'EOF'
+	.set nomacro
+	.text
+	extbl	$3, $2, $3	!lituse_bytoff!1
+	ldq	$2, a($29)	!literal!1
+	ldq	$4, b($29)	!literal!2
+	ldq_u	$3, 0($2)	!lituse_base!1
+	ldq	$27, f($29)	!literal!5
+	jsr	$26, ($27), f	!lituse_jsr!5
+	ldah	$29, 0($26)	!gpdisp!3
+	lda	$0, c($29)	!gprel
+	ldah	$1, d($29)	!gprelhigh
+	lda	$1, d($1)	!gprellow
+	lda	$29, 0($29)	!gpdisp!3
+EOF
+	    if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
+		gcc_cv_as_explicit_relocs=yes
+	    else
+		gcc_cv_as_explicit_relocs=no
+	    fi
+	    rm -f conftest.s conftest.o
+	fi
+    ])
+    if test "x$gcc_cv_as_explicit_relocs" = xyes; then
+	AC_DEFINE(HAVE_AS_EXPLICIT_RELOCS, 1,
+		[Define if your assembler supports explicit relocations.])
+    fi
+    ;;
   sparc*-*-*)
     AC_CACHE_CHECK([assembler .register pseudo-op support],
 	gcc_cv_as_register_pseudo_op, [