Support Big Endian in ICU: part 3

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 2e63fa934603384ccd9cb5a8e6afaa416a3233cd..b6bf328dff40c5345e62d7b34578b5643c4b5868 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -582,19 +582,31 @@ if (icu_use_data_file) {
         sources = [
           "android/icudtl.dat",
         ]
+      } else if (current_cpu == "mips" || current_cpu == "mips64") {
+        sources = [
+          "common/icudtb.dat",
+        ]
       } else {
         sources = [
           "common/icudtl.dat",
         ]
       }
 
-      outputs = [
-        "$root_out_dir/icudtl.dat",
-      ]
-
-      data = [
-        "$root_out_dir/icudtl.dat",
-      ]
+      if (current_cpu == "mips" || current_cpu == "mips64") {
+        outputs = [
+          "$root_out_dir/icudtb.dat",
+        ]
+        data = [
+          "$root_out_dir/icudtb.dat",
+        ]
+      } else {
+        outputs = [
+          "$root_out_dir/icudtl.dat",
+        ]
+        data = [
+          "$root_out_dir/icudtl.dat",
+        ]
+      }
     }
   }
 } else {
@@ -613,27 +625,35 @@ if (icu_use_data_file) {
       ]
     }
   } else {
+    data_bundle = "common/icudtl.dat"
+    data_assembly = "$target_gen_dir/icudtl_dat.S"
+    if (is_android) {
+      data_bundle = "android/icudtl.dat"
+    }
+    else if (current_cpu == "mips" || current_cpu == "mips64") {
+      data_bundle = "common/icudtb.dat"
+      data_assembly = "$target_gen_dir/icudtb_dat.S"
+    }
+
+    action("make_data_assembly") {
+      script = "scripts/make_data_assembly.py"
+      inputs = [ data_bundle ]
+      outputs = [ data_assembly ]
+      args = [
+        rebase_path(data_bundle, root_build_dir),
+        rebase_path(data_assembly, root_build_dir),
+      ]
+      if (is_mac) {
+        args += [ "--mac" ]
+      }
+    }
+
     source_set("icudata") {
-      # These are hand-generated, but will do for now.
-      #
       # TODO(GYP): Gyp has considerations here for QNX and for the host toolchain
       #  that have not been ported over.
-      if (is_linux) {
-        sources = [
-          "linux/icudtl_dat.S",
-        ]
-      } else if (is_mac) {
-        sources = [
-          "mac/icudtl_dat.S",
-        ]
-      } else if (is_android) {
-        sources = [
-          "android/icudtl_dat.S",
-        ]
-      } else {
-        assert(false, "No icu data for this platform")
-      }
+      sources = [ data_assembly, ]
       defines = [ "U_HIDE_DATA_SYMBOL" ]
+      deps = [ ":make_data_assembly", ]
     }
   }
 }