allow explicit override of use_tbb

jjallaire · jjallaire · commit c81beaea838d · 2014-08-14T09:01:23.000-07:00
diff --git a/inst/include/RcppParallel.h b/inst/include/RcppParallel.h
@@ -6,12 +6,14 @@
 #include "RcppParallel/TinyThread.h"
 
 // Use TBB only where it's known to compile and work correctly
+#ifndef RCPP_PARALLEL_USE_TBB
 #if defined(__APPLE__) || defined(__gnu_linux__)
   #define RCPP_PARALLEL_USE_TBB 1
   #include "RcppParallel/TBB.h"
 #else
   #define RCPP_PARALLEL_USE_TBB 0
 #endif
+#endif
 
 #include "RcppParallel/RVector.h"
 #include "RcppParallel/RMatrix.h"
