Update README.md

Author: StephanPreibisch

README.md

@@ -5,13 +5,10 @@ Implementation of 3d non-separable convolution using CUDA & FFT Convolution,
 
 To compile it under Linux/Mac/Windows I suggest NSight. Clone this repository into your cuda-workspace directory. Then make a new shared library project with the same name as the directory.
 
-Under Project > Properties > Build > Settings > Tool Settings > NVCC Compiler add -lcufft to the command line pattern so that it looks like this:
-
-${COMMAND} ${FLAGS} -lcufft ${OUTPUT_FLAG} ${OUTPUT_PREFIX} ${OUTPUT} ${INPUTS}
-
-Under Project > Properties > Build > Settings > Tool Settings > NVCC Linker add -lcuda to the command line pattern so that it looks like this:
+Under Project > Properties > Build > Settings > Tool Settings > NVCC Linker add -lcufft and -lcuda to the command line pattern so that it looks like this:
 
 ${COMMAND} ${FLAGS} -lcufft -lcuda ${OUTPUT_FLAG} ${OUTPUT_PREFIX} ${OUTPUT} ${INPUTS}
 
-
 Now build the .so/.dll library and put it into the Fiji directory.
+
+NOTE: If you are compiling under Windows, you need to change all 'extern "C"' definitions to 'extern "C" __declspec(dllexport)' for all function calls in the convolution3Dfft.h and convolution3Dfft.cu.