[gdc-7] fix Issue 303: libgphobos.spec not found linking stage2

gcc/d/dmd/mtype.d

@@ -3409,10 +3409,10 @@ extern (C++) final class TypeBasic : Type
             EnumDeclaration ed = (cast(TypeEnum)to).sym;
             if (ed.isSpecial())
             {
-                /* Special enums that allow implicit conversions to them
-                 * with a MATCH.convert
-                 */
+                /* Special enums that allow implicit conversions to them.  */
                 tob = to.toBasetype().isTypeBasic();
+                if (tob)
+                    return implicitConvTo(tob);
             }
             else
                 return MATCH.nomatch;

gcc/d/dmd/root/longdouble.d

@@ -41,6 +41,7 @@ struct longdouble
     }
 
     longdouble opAssign(T)(T r)
+        if (!is (T : longdouble))
     {
         this.set(r);
         return this;

gcc/d/patches/patch-gcc-7.patch

@@ -185,23 +185,23 @@ relevant documentation about the GDC front end.
  	return;
        if (TREE_STATIC (decl) && decl_function_context (decl))
  	context_die = lookup_decl_die (DECL_CONTEXT (decl));
-@@ -29054,6 +29066,7 @@ prune_unused_types_walk_local_classes (d
+@@ -27804,6 +27816,7 @@ prune_unused_types_walk_local_classes (d
      case DW_TAG_structure_type:
      case DW_TAG_union_type:
      case DW_TAG_class_type:
 +    case DW_TAG_interface_type:
        break;
 
      case DW_TAG_subprogram:
-@@ -29087,6 +29100,7 @@ prune_unused_types_walk (dw_die_ref die)
+@@ -27837,6 +27850,7 @@ prune_unused_types_walk (dw_die_ref die)
      case DW_TAG_structure_type:
      case DW_TAG_union_type:
      case DW_TAG_class_type:
 +    case DW_TAG_interface_type:
        if (die->die_perennial_p)
  	break;
 
-@@ -29113,7 +29127,6 @@ prune_unused_types_walk (dw_die_ref die)
+@@ -27863,7 +27877,6 @@ prune_unused_types_walk (dw_die_ref die)
      case DW_TAG_volatile_type:
      case DW_TAG_typedef:
      case DW_TAG_array_type:

gcc/d/patches/patch-targetdm-7.patch

@@ -318,6 +318,14 @@ The following OS versions are implemented:
  # Support for --with-cpu and related options (and a few unrelated options,
  # too).
  case ${with_cpu} in
+@@ -4586,6 +4614,7 @@ case ${target} in
+ 		out_file=rs6000/rs6000.c
+ 		c_target_objs="${c_target_objs} rs6000-c.o"
+ 		cxx_target_objs="${cxx_target_objs} rs6000-c.o"
++		d_target_objs="${d_target_objs} rs6000-d.o"
+ 		tmake_file="rs6000/t-rs6000 ${tmake_file}"
+ 		;;
+
 --- /dev/null
 +++ b/gcc/config/aarch64/aarch64-d.c
 @@ -0,0 +1,31 @@