Add /Z7 switch to V8 gyp (#9127)

3rdParty/V8/CMakeLists.txt

@@ -123,6 +123,12 @@ if (WIN32)
   MESSAGE(STATUS "Building V8 for Windows with MSBUILD")
   set(GYP_MAIN gypfiles/gyp_v8)
 
+  if (USE_CLCACHE_MODE)
+    list(APPEND V8_GYP_ARGS "-Duse_clcache_mode=true")
+  else ()
+    list(APPEND V8_GYP_ARGS "-Duse_clcache_mode=false")
+  endif()
+
   if (${CMAKE_GENERATOR} MATCHES "2013")
     # try to find 2013 in 'Visual Studio 12 2013 Win64'
     set(GYP_MSVS_VERSION "2013")

3rdParty/V8/v7.1.302.28/gypfiles/standalone.gypi

@@ -88,6 +88,9 @@
         # Default sysroot if no sysroot can be provided.
         'sysroot%': '',
 
+        # Default clcache mode if no use_clcache_mode can be provided.
+        'use_clcache_mode%': 'false',
+
         'conditions': [
           # The system root for linux builds.
           ['OS=="linux" and use_sysroot==1', {
@@ -943,9 +946,13 @@
             'RuntimeTypeInfo': 'false',
             'WarningLevel': '3',
             'WarnAsError': 'true',
-            'DebugInformationFormat': '3',
             'Detect64BitPortabilityProblems': 'false',
             'conditions': [
+              ['use_clcache_mode=="true"', {
+                'DebugInformationFormat': '1',
+              }, {
+                'DebugInformationFormat': '3',
+              }],
               [ 'msvs_multi_core_compile', {
                 'AdditionalOptions': ['/MP'],
               }],