we now require SSE_2_ so bump up the architecture for gcc.

indra/cmake/00-Common.cmake

@@ -169,7 +169,7 @@ if (LINUX)
     add_definitions(-fvisibility=hidden)
     # don't catch SIGCHLD in our base application class for the viewer - some of our 3rd party libs may need their *own* SIGCHLD handler to work.  Sigh!  The viewer doesn't need to catch SIGCHLD anyway.
     add_definitions(-DLL_IGNORE_SIGCHLD)
-    add_definitions(-march=pentium3 -mfpmath=sse)
+    add_definitions(-march=pentium4 -mfpmath=sse)
     #add_definitions(-ftree-vectorize) # THIS CRASHES GCC 3.1-3.2
     if (NOT STANDALONE)
       # this stops us requiring a really recent glibc at runtime