Fixed Mac OS X specific issues (CUDA) in the build script.

CudaTool.py

@@ -33,6 +33,7 @@ CUDA Tool for SCons
 breuera - changes (see original: http://www.scons.org/wiki/CudaTool)
  * commented out *.linkinfo
  * lib64 instead of lib
+ * removed unnecessary SDK, "cudaSDKPath + '/lib64', cudaSDKPath + '/common/lib64' + cudaSDKSubLibDir, ", from LIBSPATH
 ***
 
 """
@@ -172,7 +173,7 @@ def generate(env):
 
         # add required libraries
         env.Append(CPPPATH=[cudaSDKPath + '/common/inc', cudaToolkitPath + '/include'])
-        env.Append(LIBPATH=[cudaSDKPath + '/lib64', cudaSDKPath + '/common/lib64' + cudaSDKSubLibDir, cudaToolkitPath + '/lib64'])
+        env.Append(LIBPATH=[cudaToolkitPath + '/lib64'])
         env.Append(LIBS=['cudart'])
 
 def exists(env):

SConstruct

@@ -190,6 +190,10 @@ if env['parallelization'] in ['cuda', 'mpi_with_cuda']:
   env.Append(NVCCFLAGS=' --gpu-architecture=')
   env.Append(NVCCFLAGS=env['computeCapability'])
   
+  # compile explicitly with 64-bit on Mac OS X
+  if env['PLATFORM'] == 'darwin':
+    env.Append(NVCCFLAGS=' -m64')
+
 # set the precompiler flags for MPI (CUDA)
 if env['parallelization'] in ['mpi_with_cuda']:
   env.Append(NVCCFLAGS=' -DUSEMPI')