Add Clang static analyzer to Clang toolchain defs in GN

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.
 
 import("//build/config/android/config.gni")
 import("//build/config/clang/clang.gni")
 import("//build/config/nacl/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 import("//build/toolchain/cc_wrapper.gni")
+import("//build/toolchain/clang_static_analyzer.gni")
 import("//build/toolchain/goma.gni")
 import("//build/toolchain/toolchain.gni")
 
 # This template defines a toolchain for something that works like gcc
 # (including clang).
 #
 # It requires the following variables specifying the executables to run:
 #  - ar
 #  - cc
 #  - cxx
@@ skipping 457 matching lines @@
   if (defined(invoker.toolprefix)) {
     toolprefix = invoker.toolprefix
   } else {
     toolprefix = ""
   }
 
   gcc_toolchain(target_name) {
     prefix = rebase_path("$clang_base_path/bin", root_build_dir)
     cc = "$prefix/clang"
     cxx = "$prefix/clang++"
-    ld = cxx
+
+    if (use_clang_static_analyzer) {

[sdefresne, 2017/01/10 09:06:05]

You'll also need to add this to build/toolchain/mac/BUILD.gn as it does not use
gcc_toolchain template.

+      # Call "ccc-analyzer" or "c++-analyzer" instead of directly calling Clang.
+      # |wrapper_tool| sets the environment variables which are read by the
+      # analyzer tools.
+      analyzer_wrapper =
+          rebase_path("//build/toolchain/clang_static_analyzer_wrapper.py",
+                      root_build_dir)
+      cc = analyzer_wrapper + " --clang-cc-path=${cc} --analyzer=" + rebase_path(
+               "//third_party/llvm/tools/clang/tools/scan-build/libexec/ccc-analyzer",
+               root_build_dir)
+      cxx = analyzer_wrapper + " --clang-cxx-path=${cxx} --analyzer=" + rebase_path(
+                "//third_party/llvm/tools/clang/tools/scan-build/libexec/c++-analyzer",
+                root_build_dir)
+    }
 
     readelf = "${toolprefix}readelf"
     ar = "${toolprefix}ar"
     nm = "${toolprefix}nm"
+    ld = cxx
 
     forward_variables_from(invoker, [ "strip" ])
 
     toolchain_args = {
       if (defined(invoker.toolchain_args)) {
         forward_variables_from(invoker.toolchain_args, "*")
       }
       is_clang = true
     }
   }
 }