libODE and GIMPACT vs OPCODE (car jumps around? look here)

[FFuser]

Code:

Index: SConstruct
===================================================================
--- SConstruct  (revision 1847)
+++ SConstruct  (working copy)
@@ -25,6 +25,7 @@
opts.Add(BoolOption('force_feedback', 'Enable force-feedback support', 0))
opts.Add(BoolOption('profiling', 'Turn on profiling output', 0))
opts.Add(BoolOption('efficiency', 'Turn on compile-time efficiency warnings', 0))
+opts.Add(BoolOption('opcode', 'Set this to one if you have ode compiled with opcode', 0))


#--------------------------#
@@ -316,6 +317,7 @@
       'scons NLS=0' To disable internationalization support (An english-only version will be built)
          'scons efficiency=1' to show efficiency assessment at compile time
          'scons profiling=1' to enable profiling support
+        'scons opcode=1' if you have ODE compiled with opcode
%s

Note: The options you enter will be saved in the file vdrift.conf and they will be the defaults which are used every subsequent time you run scons.""" % opts.GenerateHelpText(env))
@@ -361,6 +363,9 @@
         print 'This system is not configured for internationalized applications (no libintl.h). An english-only version will be built\n'
         env['NLS'] = 0

+if env['opcode']:
+       cppdefines.append("LIBODE_OPCODE")
+
env = conf.Finish()

use with "scons opcode=1", I do not have any idea how to detect it automagically

Btw: driving in the sand gives strange results (Opcode, 64 bit)