[infra] Assembles the SDK using GN rather than create_sdk.py

build/toolchain/mac/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.
 
 # TODO(brettw) Use "gcc_toolchain.gni" like the Linux toolchains. This requires
 # some enhancements since the commands on Mac are slightly different than on
 # Linux.
 
 import("../goma.gni")
 import("//build/config/mac/mac_sdk.gni")
@@ skipping 153 matching lines @@
       # tocname for dependency management.
       outputs = [
         dylib,
         tocname,
       ]
       link_output = dylib
       depend_output = tocname
     }
 
     tool("link") {
-      outfile = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"
+      exename = "{{target_output_name}}{{output_extension}}"
+      outfile = "{{root_out_dir}}/$exename"
       rspfile = "$outfile.rsp"
 
+      if (defined(invoker.strip)) {
+        stripped_outfile = "{{root_out_dir}}/exe.stripped/$exename"
+      }
+
       command = "$ld $sysroot_flags $toolchain_flags {{ldflags}} -Xlinker -rpath -Xlinker @executable_path/Frameworks -o $outfile -Wl,-filelist,$rspfile {{solibs}} {{libs}}"
+      if (defined(invoker.strip)) {
+        strip = invoker.strip
+        strip_command = "${strip} -x -o $stripped_outfile $outfile"
+        command += " && " + strip_command
+      }
+
       description = "LINK $outfile"
       rspfile_content = "{{inputs_newline}}"
       outputs = [
         outfile,
       ]
+      if (defined(invoker.strip)) {
+        outputs += [ stripped_outfile ]
+      }
     }
 
     tool("stamp") {
       command = "touch {{output}}"
       description = "STAMP {{output}}"
     }
 
     tool("copy") {
       command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
       description = "COPY {{source}} {{output}}"
@@ skipping 16 matching lines @@
 
 # Toolchain used for Mac host targets.
 mac_toolchain("clang_x64") {
   toolchain_cpu = "x64"
   toolchain_os = "mac"
   prefix = rebase_path("//buildtools/toolchain/clang+llvm-x86_64-darwin/bin",
                        root_build_dir)
   cc = "${goma_prefix}$prefix/clang"
   cxx = "${goma_prefix}$prefix/clang++"
   ld = cxx
+  strip = "${prefix}/strip"
   is_clang = true
   sysroot_flags = "-isysroot $mac_sdk_path -mmacosx-version-min=$mac_sdk_min"
 }
 
 # Toolchain used for Mac host (i386) targets.
 mac_toolchain("clang_x86") {
   toolchain_cpu = "i386"
   toolchain_os = "mac"
   prefix = rebase_path("//buildtools/toolchain/clang+llvm-x86_64-darwin/bin",
                        root_build_dir)
   cc = "${goma_prefix}$prefix/clang"
   cxx = "${goma_prefix}$prefix/clang++"
   ld = cxx
+  strip = "${prefix}/strip"
   is_clang = true
   sysroot_flags = "-isysroot $mac_sdk_path -mmacosx-version-min=$mac_sdk_min"
 }