MIPS64: Add clang compile flags for MIPS64r6

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/nacl/config.gni")
 import("//build/toolchain/cc_wrapper.gni")
 import("//build/toolchain/toolchain.gni")
@@ skipping 324 matching lines @@
     # TODO(thestig): Make this flag work with GN.
     #if (!is_official_build && !is_chromeos && !(is_asan || is_lsan || is_tsan || is_msan)) {
     #  ldflags += [
     #    "-Wl,--detect-odr-violations",
     #  ]
     #}
   } else if (linux_use_bundled_binutils) {
     # Gold is the default linker for the bundled binutils so we explicitly
     # enable the bfd linker when use_gold is not set.
     ldflags += [ "-fuse-ld=bfd" ]
-  } else if (is_android && current_cpu == "mipsel" && is_clang) {
+  } else if (is_android && is_clang &&
+             (current_cpu == "mipsel" || current_cpu == "mips64el")) {
     # Let clang find the ld.bfd in the NDK.
     _rebased_android_toolchain_root =
         rebase_path(android_toolchain_root, root_build_dir)
     ldflags += [ "--gcc-toolchain=$_rebased_android_toolchain_root" ]
   }
 
   if (is_posix && (use_gold || (use_lld && !is_nacl)) && !using_sanitizer &&
       !(is_android && use_order_profiling)) {
     # TODO(crbug.com/576197) - gcc on x86 platforms + gold + icf=all
     # doesn't currently work. Once it does, use icf=all everywhere.
@@ skipping 255 matching lines @@
 
       if (mips_dsp_rev == 1) {
         cflags += [ "-mdsp" ]
       } else if (mips_dsp_rev == 2) {
         cflags += [ "-mdspr2" ]
       }
 
       cflags += [ "-m${mips_float_abi}-float" ]
     } else if (current_cpu == "mips64el") {
       if (mips_arch_variant == "r6") {
-        cflags += [
-          "-mips64r6",
-          "-Wa,-mips64r6",
-        ]
-        ldflags += [ "-mips64r6" ]
+        if (is_clang) {
+          if (is_android) {
+            cflags += [
+              "--target=mips64el-linux-android",
+              "-march=mips64el",
+              "-mcpu=mips64r6",
+            ]
+            ldflags += [ "--target=mips64el-linux-android" ]
+          }
+        } else {
+          cflags += [
+            "-mips64r6",
+            "-Wa,-mips64r6",
+          ]
+          ldflags += [ "-mips64r6" ]
+        }
       } else if (mips_arch_variant == "r2") {
         cflags += [
           "-mips64r2",
           "-Wa,-mips64r2",
         ]
         ldflags += [ "-mips64r2" ]
       }
     } else if (current_cpu == "pnacl" && is_nacl_nonsfi) {
       if (target_cpu == "x86" || target_cpu == "x64") {
         cflags += [
@@ skipping 827 matching lines @@
 
 if (is_ios || is_mac) {
   # On Mac and iOS, this enables support for ARC (automatic ref-counting).
   # See http://clang.llvm.org/docs/AutomaticReferenceCounting.html.
   config("enable_arc") {
     common_flags = [ "-fobjc-arc" ]
     cflags_objc = common_flags
     cflags_objcc = common_flags
   }
 }