Enable C++11. Synch toolchains with Chrome.

* Consistently enable C++11 features on all platforms.
* Use the same ARM toolchain version as Chrome.
* Make clang the default on Mac OS X, just like Chrome.
* Use C99 on Mac OS X, again following Chrome.
* Small build fixes.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/440663002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22875 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Makefile.android

@@ -51,7 +51,7 @@ ifeq ($(ARCH), android_arm)
   DEFINES += arm_neon=0 arm_version=7
   TOOLCHAIN_ARCH = arm-linux-androideabi
   TOOLCHAIN_PREFIX = $(TOOLCHAIN_ARCH)
-  TOOLCHAIN_VER = 4.6
+  TOOLCHAIN_VER = 4.8
 else
   ifeq ($(ARCH), android_arm64)
     DEFINES  = target_arch=arm64 v8_target_arch=arm64 android_target_arch=arm64 android_target_platform=L

build/android.gypi

@@ -75,7 +75,12 @@
       },  # Release
     },  # configurations
     'cflags': [ '-Wno-abi', '-Wall', '-W', '-Wno-unused-parameter',
-                '-Wnon-virtual-dtor', '-fno-rtti', '-fno-exceptions', ],
+                '-Wnon-virtual-dtor', '-fno-rtti', '-fno-exceptions',
+                # Note: Using -std=c++0x will define __STRICT_ANSI__, which in
+                # turn will leave out some template stuff for 'long long'. What
+                # we want is -std=c++11, but this is not supported by GCC 4.6 or
+                # Xcode 4.2
+                '-std=gnu++0x' ],
     'target_conditions': [
       ['_toolset=="target"', {
         'cflags!': [

build/standalone.gypi

@@ -33,7 +33,6 @@
   'includes': ['toolchain.gypi'],
   'variables': {
     'component%': 'static_library',
-    'clang%': 0,
     'asan%': 0,
     'tsan%': 0,
     'visibility%': 'hidden',
@@ -117,6 +116,11 @@
       }, {
         'v8_enable_gdbjit%': 0,
       }],
+      ['OS=="mac"', {
+        'clang%': 1,
+      }, {
+        'clang%': 0,
+      }],
     ],
     # Default ARM variable settings.
     'arm_version%': 'default',
@@ -214,12 +218,9 @@
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-Wno-long-long', '-pthread', '-fno-exceptions',
                     '-pedantic' ],
-        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti' ],
+        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti', '-std=gnu++0x' ],
         'ldflags': [ '-pthread', ],
         'conditions': [
-          [ 'OS=="linux"', {
-            'cflags': [ '-ansi' ],
-          }],
           [ 'visibility=="hidden" and v8_enable_backtrace==0', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
@@ -235,7 +236,7 @@
       'target_defaults': {
         'cflags': [ '-Wall', '<(werror)', '-W', '-Wno-unused-parameter',
                     '-fno-exceptions' ],
-        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti' ],
+        'cflags_cc': [ '-Wnon-virtual-dtor', '-fno-rtti', '-std=gnu++0x' ],
         'conditions': [
           [ 'visibility=="hidden"', {
             'cflags': [ '-fvisibility=hidden' ],
@@ -333,7 +334,7 @@
       'target_defaults': {
         'xcode_settings': {
           'ALWAYS_SEARCH_USER_PATHS': 'NO',
-          'GCC_C_LANGUAGE_STANDARD': 'ansi',        # -ansi
+          'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
           'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
           'GCC_DYNAMIC_NO_PIC': 'NO',               # No -mdynamic-no-pic
                                                     # (Equivalent to -fPIC)
@@ -369,7 +370,7 @@
           ['clang==1', {
             'xcode_settings': {
               'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
-              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++11',  # -std=gnu++11
+              'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++0x',  # -std=gnu++0x
             },
           }],
         ],

src/base/platform/platform-posix.cc

@@ -515,7 +515,7 @@ Thread::Thread(const Options& options)
     : data_(new PlatformData),
       stack_size_(options.stack_size()),
       start_semaphore_(NULL) {
-  if (stack_size_ > 0 && stack_size_ < PTHREAD_STACK_MIN) {
+  if (stack_size_ > 0 && static_cast<size_t>(stack_size_) < PTHREAD_STACK_MIN) {
     stack_size_ = PTHREAD_STACK_MIN;
   }
   set_name(options.name());

src/json-parser.h

@@ -719,7 +719,8 @@ Handle<String> JsonParser<seq_ascii>::ScanJsonString() {
     } while (c0 != '"');
     int length = position - position_;
     uint32_t hash = (length <= String::kMaxHashCalcLength)
-        ? StringHasher::GetHashCore(running_hash) : length;
+                        ? StringHasher::GetHashCore(running_hash)
+                        : static_cast<uint32_t>(length);
     Vector<const uint8_t> string_vector(
         seq_source_->GetChars() + position_, length);
     StringTable* string_table = isolate()->heap()->string_table();

test/cctest/test-utils.cc

@@ -27,6 +27,8 @@
 
 #include <stdlib.h>
 
+#include <vector>
+
 #include "src/v8.h"
 
 #include "src/base/platform/platform.h"
@@ -218,3 +220,40 @@ TEST(SequenceCollectorRegression) {
   CHECK_EQ(0, strncmp("0123456789012345678901234567890123",
                       seq.start(), seq.length()));
 }
+
+
+// TODO(svenpanne) Unconditionally test this when our infrastructure is fixed.
+#if !V8_CC_MSVC
+TEST(CPlusPlus11Features) {
+  struct S {
+    bool x;
+    struct T {
+      double y;
+      int z[3];
+    } t;
+  };
+  S s{true, {3.1415, {1, 2, 3}}};
+  CHECK_EQ(2, s.t.z[1]);
+
+// TODO(svenpanne) Remove the old-skool code when we ship the new C++ headers.
+#if 0
+  std::vector<int> vec{11, 22, 33, 44};
+#else
+  std::vector<int> vec;
+  vec.push_back(11);
+  vec.push_back(22);
+  vec.push_back(33);
+  vec.push_back(44);
+#endif
+  vec.push_back(55);
+  vec.push_back(66);
+  for (auto& i : vec) {
+    ++i;
+  }
+  int j = 12;
+  for (auto i : vec) {
+    CHECK_EQ(j, i);
+    j += 11;
+  }
+}
+#endif