Add Clang static analyzer to Clang toolchain defs in GN

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/clang/clang.gni")
 if (is_ios) {
   import("//build/config/ios/ios_sdk.gni")
 }
 import("//build/config/mac/mac_sdk.gni")
 import("//build/config/mac/symbols.gni")
 
 assert(host_os == "mac")
 
 import("//build/toolchain/cc_wrapper.gni")
+import("//build/toolchain/clang_static_analyzer.gni")
 import("//build/toolchain/goma.gni")
 import("//build/toolchain/toolchain.gni")
 import("//build/toolchain/concurrent_links.gni")
 
 declare_args() {
   # Reduce the number of tasks using the copy_bundle_data and compile_xcassets
   # tools as they can cause lots of I/O contention when invoking ninja with a
   # large number of parallel jobs (e.g. when using distributed build like goma).
   bundle_pool_depth = -1
 }
@@ skipping 85 matching lines @@
              "Goma and cc_wrapper can't be used together.")
       compiler_prefix = "$goma_dir/gomacc "
     } else if (toolchain_cc_wrapper != "") {
       compiler_prefix = toolchain_cc_wrapper + " "
     } else {
       compiler_prefix = ""
     }
 
     cc = compiler_prefix + _cc
     cxx = compiler_prefix + _cxx
-    ld = _cxx
+
+    if (use_clang_static_analyzer && !toolchain_uses_goma) {
+      # 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=${cc} --analyzer=" +
+           rebase_path("//third_party/scan-build/src/libexec/ccc-analyzer",
+                       root_build_dir)
+      cxx = analyzer_wrapper + " --clang-cxx-path=${cxx} --analyzer=" +
+            rebase_path("//third_party/scan-build/src/libexec/c++-analyzer",
+                        root_build_dir)
+    }
+
+    ld = cxx
 
     linker_driver =
         "TOOL_VERSION=${tool_versions.linker_driver} " +
         rebase_path("//build/toolchain/mac/linker_driver.py", root_build_dir)
 
     # On iOS, the final applications are assembled using lipo (to support fat
     # builds). The correct flags are passed to the linker_driver.py script
     # directly during the lipo call.
     if (toolchain_args.current_os != "ios") {
       _enable_dsyms = enable_dsyms
@@ skipping 363 matching lines @@
     }
   }
 
   mac_toolchain("ios_clang_x64") {
     toolchain_args = {
       current_cpu = "x64"
       current_os = "ios"
     }
   }
 }