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

build/toolchain/gcc_toolchain.gni

 # 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.
 
 # This value will be inherited in the toolchain below.
 concurrent_links = exec_script("get_concurrent_links.py", [], "value")
 
 # This template defines a toolchain for something that works like gcc
 # (including clang).
 #
@@ skipping 20 matching lines @@
 #  - solink_libs_section_postfix
 #      Same as libs_section_{pre,post}fix except used for solink instead of link.
 #  - post_solink
 #      The content of this string, if specified, will be appended to the solink
 #      command.
 #  - deps
 #      Just forwarded to the toolchain definition.
 #  - is_clang
 #  - strip
 #      Location of the strip executable. When specified, strip will be run on
-#      all shared libraries and executables as they are built. The pre-stripped
-#      artifacts will be put in lib.stripped/ and exe.stripped/.
+#      all executables as they are built. The stripped artifacts will be put in
+#      exe.stripped/.
 template("gcc_toolchain") {
   toolchain(target_name) {
     assert(defined(invoker.cc), "gcc_toolchain() must specify a \"cc\" value")
     assert(defined(invoker.cxx), "gcc_toolchain() must specify a \"cxx\" value")
     assert(defined(invoker.ar), "gcc_toolchain() must specify a \"ar\" value")
     assert(defined(invoker.ld), "gcc_toolchain() must specify a \"ld\" value")
     assert(defined(invoker.readelf),
            "gcc_toolchain() must specify a \"readelf\" value")
     assert(defined(invoker.nm), "gcc_toolchain() must specify a \"nm\" value")
     assert(defined(invoker.toolchain_cpu),
@@ skipping 132 matching lines @@
         outputs += invoker.solink_outputs
       }
       link_output = sofile
       depend_output = tocfile
     }
 
     tool("link") {
       exename = "{{target_output_name}}{{output_extension}}"
       outfile = "{{root_out_dir}}/$exename"
       rspfile = "$outfile.rsp"
-      unstripped_outfile = outfile
 
       if (defined(invoker.strip)) {
-        unstripped_outfile = "{{root_out_dir}}/exe.unstripped/$exename"
+        stripped_outfile = "{{root_out_dir}}/exe.stripped/$exename"
       }
 
-      command = "$ld {{ldflags}} -o $unstripped_outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group $libs_section_prefix {{libs}} $libs_section_postfix"
+      command = "$ld {{ldflags}} -o $outfile -Wl,--start-group @$rspfile {{solibs}} -Wl,--end-group $libs_section_prefix {{libs}} $libs_section_postfix"
       if (defined(invoker.strip)) {
         strip = invoker.strip
         strip_command =
-            "${strip} --strip-unneeded -o $outfile $unstripped_outfile"
+            "${strip} --strip-unneeded -o $stripped_outfile $outfile"
         command += " && " + strip_command
       }
       if (defined(invoker.postlink)) {
         command += " && " + invoker.postlink
       }
       description = "LINK $outfile"
       rspfile_content = "{{inputs}}"
       outputs = [
         outfile,
       ]
-      if (outfile != unstripped_outfile) {
-        outputs += [ unstripped_outfile ]
+      if (defined(invoker.strip)) {
+        outputs += [ stripped_outfile ]
       }
       if (defined(invoker.link_outputs)) {
         outputs += invoker.link_outputs
       }
     }
 
     tool("stamp") {
       command = "touch {{output}}"
       description = "STAMP {{output}}"
     }
@@ skipping 16 matching lines @@
       if (defined(invoker.is_clang)) {
         is_clang = invoker.is_clang
       }
     }
 
     if (defined(invoker.deps)) {
       deps = invoker.deps
     }
   }
 }