Enable RTTI for ICU.

ICU 4.6 uses RTTI (dynamic_cast and typeid) in many places. 

It'll increase the vtbl size. I'm gonna measure the size impact by
making two builds:

1. With rtti enabled
2. With rtti disabled, but with dynamic_cast replaced with
static_cast and typeid with 'something' buildable. This build wouldn't run
properly, but for the size comparision, just compiling it should be fine.

On Windows, we set _HAS_EXCEPTIONS to 0 in common.gypi. To build ICU
without enabling exception as well on Windows, we replaced the following line 

#include <typeinfo>

with 

#include "unicode/utypeinfo.h"

and add a new file 'common/unicode/utypeinfo.h' with the following:


#if defined(_MSC_VERSION) && _HAS_EXCEPTIONS == 0
#include <exception>
using std::exception;
#endif 
#include <typeinfo>


BUG=61514
TEST=On all 3 platforms, Chrome can be built and can be run without crash.


Review URL: http://codereview.chromium.org/6484008

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/icu46@75186 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

1 files changed, 30 insertions, 0 deletions

diff --git a/icu.gyp b/icu.gyp
index 3ed63ae..e0691e9 100644
--- a/icu.gyp
+++ b/icu.gyp
@@ -270,6 +270,21 @@
               'cflags': [
                 '-Wno-deprecated-declarations',
               ],
+              'cflags_cc': [
+                '-frtti',
+              ],
+            }],
+            ['OS == "mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+              }
+            }],
+            ['OS == "win"', {
+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'RuntimeTypeInfo': 'true',
+                },
+              }
             }],
           ],
         },
@@ -471,6 +486,21 @@
                 '-Wno-deprecated-declarations',
                 '-Wno-unused-function',
               ],
+              'cflags_cc': [
+                '-frtti',
+              ],
+            }],
+            ['OS == "mac"', {
+              'xcode_settings': {
+                'GCC_ENABLE_CPP_RTTI': 'YES',       # -frtti
+              }
+            }],
+            ['OS == "win"', {
+              'msvs_settings': {
+                'VCCLCompilerTool': {
+                  'RuntimeTypeInfo': 'true',
+                },
+              }
             }],
           ],
         },