Added labelled thread names to help with some debugging activity. Right now,...

SConstruct

Index: SConstruct
===================================================================
--- SConstruct	(revision 6114)
+++ SConstruct	(working copy)
@@ -124,6 +124,9 @@
     },
     'debuggersupport:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT'],
+    },
+    'debugthreadnames:on': {
+      'CPPDEFINES':   ['DEBUG_THREAD_NAMES'],

[Søren Thygesen Gjesse, 2011/01/03 07:48:34]

Why do you want to enable/disable this using conditional compilation? It does
not seem to add any overhead except for the 16 char name for each thread. If
there are other penalties then I suggest that a flag --threadnames is added to
skip the OS call to actually set the name for the thread.

[marklam, 2011/01/04 01:47:09]

I didn't know how strict we want to be about not incurring any cost that may not
yield any benefits for the various platforms.  I agree that the cost here is
minimal, and I'm fine with removing the conditional nature of it.  I'll make the
appropriate change for making this unconditional.  Thanks.

     }
   },
   'gcc': {
@@ -734,6 +737,11 @@
     'default': 'on',
     'help': 'enable debugging of JavaScript code'
   },
+  'debugthreadnames': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'enable labelled thread names for debugging'
+  },
   'soname': {
     'values': ['on', 'off'],
     'default': 'off',