Enable debug fission for Chrome debug builds.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 72eb96d94c07528ee98e90e0bdf56958f8bef7b5..78248ddcfda68861e3e84b7d0ba7252f360f8bab 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1301,12 +1301,15 @@
           ['OS=="android"', {
             # We directly set the gcc_version since we know what we use.
             'gcc_version%': 46,
+            'binutils_version%': 222,
           }, {
             'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
+            'binutils_version%': '<!(python <(DEPTH)/build/compiler_version.py assembler)',
           }],
         ],
       }, {
         'gcc_version%': 0,
+        'binutils_version%': 0,
       }],
       ['OS=="win" and "<!(python <(DEPTH)/build/dir_exists.py <(windows_sdk_default_path))"=="True"', {
         'windows_sdk_path%': '<(windows_sdk_default_path)',
@@ -3084,6 +3087,12 @@
               }, {
                 'cflags': ['-fno-unwind-tables', '-fno-asynchronous-unwind-tables'],
               }],
+              # http://gcc.gnu.org/wiki/DebugFission
+              # Requires gold and gcc >= 4.7 or clang.
+              ['linux_use_gold_flags==1 and (clang==1 or gcc_version>=47) and binutils_version>=223', {

[ostap, 2014/03/18 16:00:06]

I have gold 1.11, binutils 2.23.2 and gcc 4.7.3 on ubuntu 13.04 .
Unfortunately getting errors:
cc1: error: unrecognised debug output level "split-dwarf"

gcc/g++ man also doesn't have this option listed.

However on Ubuntu 13.10 with gcc 4.8.1 this option exists.
It think gcc version check should be changed to gcc_version>=48 to make it work
for sure.

+                'cflags': ['-gsplit-dwarf'],
+                'ldflags': ['-Wl,--gdb-index'],
+              }],
             ],
           },
           'Release_Base': {