# DP: Support ld.mold linker, patch taken from the trunk.

--- a/src/gcc/collect2.c
+++ b/src/gcc/collect2.c
@@ -782,6 +782,7 @@ main (int argc, char **argv)
       USE_GOLD_LD,
       USE_BFD_LD,
       USE_LLD_LD,
+      USE_MOLD_LD,
       USE_LD_MAX
     } selected_linker = USE_DEFAULT_LD;
   static const char *const ld_suffixes[USE_LD_MAX] =
@@ -790,7 +791,8 @@ main (int argc, char **argv)
       PLUGIN_LD_SUFFIX,
       "ld.gold",
       "ld.bfd",
-      "ld.lld"
+      "ld.lld",
+      "ld.mold"
     };
   static const char *const real_ld_suffix = "real-ld";
   static const char *const collect_ld_suffix = "collect-ld";
@@ -967,6 +969,8 @@ main (int argc, char **argv)
 	  selected_linker = USE_GOLD_LD;
 	else if (strcmp (argv[i], "-fuse-ld=lld") == 0)
 	  selected_linker = USE_LLD_LD;
+	else if (strcmp (argv[i], "-fuse-ld=mold") == 0)
+	  selected_linker = USE_MOLD_LD;
 	else if (strncmp (argv[i], "-o", 2) == 0)
 	  {
 	    /* Parse the output filename if it's given so that we can make
@@ -1073,7 +1077,7 @@ main (int argc, char **argv)
   ld_file_name = 0;
 #ifdef DEFAULT_LINKER
   if (selected_linker == USE_BFD_LD || selected_linker == USE_GOLD_LD ||
-      selected_linker == USE_LLD_LD)
+      selected_linker == USE_LLD_LD || selected_linker == USE_MOLD_LD)
     {
       char *linker_name;
 # ifdef HOST_EXECUTABLE_SUFFIX
@@ -1299,7 +1303,7 @@ main (int argc, char **argv)
 	      else if (!use_collect_ld
 		       && strncmp (arg, "-fuse-ld=", 9) == 0)
 		{
-		  /* Do not pass -fuse-ld={bfd|gold|lld} to the linker. */
+		  /* Do not pass -fuse-ld={bfd|gold|lld|mold} to the linker. */
 		  ld1--;
 		  ld2--;
 		}
--- a/src/gcc/common.opt
+++ b/src/gcc/common.opt
@@ -2913,6 +2913,10 @@ fuse-ld=lld
 Common Driver Negative(fuse-ld=lld)
 Use the lld LLVM linker instead of the default linker.
 
+fuse-ld=mold
+Common Driver Negative(fuse-ld=mold)
+Use the Modern linker (MOLD) linker instead of the default linker.
+
 fuse-linker-plugin
 Common Undocumented Var(flag_use_linker_plugin)
 
--- a/src/gcc/gcc.c
+++ b/src/gcc/gcc.c
@@ -4120,6 +4120,10 @@ driver_handle_option (struct gcc_options
        use_ld = ".gold";
        break;
 
+    case OPT_fuse_ld_mold:
+       use_ld = ".mold";
+       break;
+
     case OPT_fcompare_debug_second:
       compare_debug_second = 1;
       break;
--- a/src/gcc/opts.c
+++ b/src/gcc/opts.c
@@ -2793,6 +2793,7 @@ common_handle_option (struct gcc_options
     case OPT_fuse_ld_bfd:
     case OPT_fuse_ld_gold:
     case OPT_fuse_ld_lld:
+    case OPT_fuse_ld_mold:
     case OPT_fuse_linker_plugin:
       /* No-op. Used by the driver and passed to us because it starts with f.*/
       break;
