c-pragma.c (apply_pragma_weak): Convert value identifier to string for decl_attributes.

        * c-pragma.c (apply_pragma_weak): Convert value identifier to
        string for decl_attributes.
        (handle_pragma_weak): Call assemble_alias if we're modifying
        an existing decl.

From-SVN: r53884

gcc/ChangeLog

 2002-05-25  Richard Henderson  <rth@redhat.com>
 
+	* c-pragma.c (apply_pragma_weak): Convert value identifier to
+	string for decl_attributes.
+	(handle_pragma_weak): Call assemble_alias if we're modifying
+	an existing decl.
+
+2002-05-25  Richard Henderson  <rth@redhat.com>
+
 	PR target/6788
 	* config/sparc/sparc.c (sparc_output_mi_thunk): New implementation
 	using rtl instead of fprintf.

gcc/c-pragma.c

@@ -283,9 +283,14 @@ apply_pragma_weak (decl, value)
      tree decl, value;
 {
   if (value)
-    decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
-				             build_tree_list (NULL, value)),
-		     0);
+    {
+      value = build_string (IDENTIFIER_LENGTH (value),
+			    IDENTIFIER_POINTER (value));
+      decl_attributes (&decl, build_tree_list (get_identifier ("alias"),
+					       build_tree_list (NULL, value)),
+		       0);
+    }
+
   if (SUPPORTS_WEAK && DECL_EXTERNAL (decl) && TREE_USED (decl)
       && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
     warning_with_decl (decl, "applying #pragma weak `%s' after first use results in unspecified behavior");
@@ -342,7 +347,11 @@ handle_pragma_weak (dummy)
 
   decl = identifier_global_value (name);
   if (decl && TREE_CODE_CLASS (TREE_CODE (decl)) == 'd')
-    apply_pragma_weak (decl, value);
+    {
+      apply_pragma_weak (decl, value);
+      if (value)
+	assemble_alias (decl, value);
+    }
   else
     pending_weaks = tree_cons (name, value, pending_weaks);
 }

gcc/testsuite/gcc.dg/weak-9.c

+/* { dg-do compile } */
+/* { dg-options "-fno-common" } */
+
+/* COFF does not support weak, and dg doesn't support UNSUPPORTED.  */
+/* { dg-do compile { xfail *-*-coff i?86-pc-cygwin h8300-*-hms } } */
+
+/* { dg-final { global target_triplet } } */
+/* { dg-final { if [string match h8300-*-hms $target_triplet ] {return} } } */
+/* { dg-final { if [string match i?86-pc-cygwin $target_triplet ] {return} } } *
+/
+/* { dg-final { if [string match *-*-coff $target_triplet ] {return} } } */
+/* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?f1" } } */
+/* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?f2" } } */
+/* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?f3" } } */
+/* { dg-final { scan-assembler "weak\[^ \t\]*\[ \t\]_?f4" } } */
+/* { dg-final { scan-assembler "notf1" } } */
+/* { dg-final { scan-assembler "notf2" } } */
+/* { dg-final { scan-assembler "notf3" } } */
+/* { dg-final { scan-assembler "notf4" } } */
+
+void f1() __attribute__((weak, alias("notf1")));
+void f2() __attribute__((alias("notf2"), weak));
+
+#pragma weak f3=notf3
+void f3();
+
+void f4();
+#pragma weak f4=notf4