Set 'gcc_version' to 0 for Clang/ASan/TSan builds.

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 146793)
+++ build/common.gypi	(working copy)
@@ -511,6 +511,9 @@
         ['OS!="mac" and OS!="android"', {
           'use_canvas_skia%': 1,
         }],
+        ['asan==1 or tsan==1', {

[Craig, 2012/07/16 15:33:07]

There's other stuff around line 1140 that sets clang to 1 too. Can that be
killed off?

[Alexander Potapenko, 2012/07/16 15:39:29]

I'm trying to do so, but undefined variables appear from different places. I'll
get back to this tomorrow.

+          'clang%': 1,
+        }],
       ],
     },
 
@@ -843,12 +846,16 @@
         'directx_sdk_path%': '$(DXSDK_DIR)',
       }],
       ['os_posix==1 and OS!="mac" and OS!="ios"', {
-        # This will set gcc_version to XY if you are running gcc X.Y.*.
-        # This is used to tweak build flags for gcc 4.4.
-        'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
         # Figure out the python architecture to decide if we build pyauto.
         'python_arch%': '<!(<(DEPTH)/build/linux/python_arch.sh <(sysroot)/usr/<(system_libdir)/libpython<(python_ver).so.1.0)',
         'conditions': [
+          ['clang==0', {
+            # This will set gcc_version to XY if you are running gcc X.Y.*.
+            # This is used to tweak build flags for gcc 4.4.

[Craig, 2012/07/16 15:33:07]

This appears only to be used in one spot for gcc 4.5 these days. Can you change
the comment to say 4.5 please?

+            'gcc_version%': '<!(python <(DEPTH)/build/compiler_version.py)',
+          }, {
+            'gcc_version%': 0,
+          }],
           ['branding=="Chrome"', {
             'linux_breakpad%': 1,
           }],