[cmake] cuda: use cuda shared runtime when building popsift as shared library

Author: fcastan

CMakeLists.txt

@@ -47,6 +47,19 @@ if(WIN32)
   link_directories(Boost_LIBRARRY_DIR_RELEASE)
 endif(WIN32)
 
+if(BUILD_SHARED_LIBS)
+  message(STATUS "BUILD_SHARED_LIBS ON")
+  # Need to declare CUDA_USE_STATIC_CUDA_RUNTIME as an option to ensure that it is not overwritten in FindCUDA.
+  option(CUDA_USE_STATIC_CUDA_RUNTIME "Use the static version of the CUDA runtime library if available" OFF)
+  set(CUDA_USE_STATIC_CUDA_RUNTIME OFF)
+  # Workaround to force deactivation of cuda static runtime for cmake < 3.10
+  set(CUDA_cudart_static_LIBRARY 0)
+else()
+  message(STATUS "BUILD_SHARED_LIBS OFF")
+  option(CUDA_USE_STATIC_CUDA_RUNTIME "Use the static version of the CUDA runtime library if available" ON)
+  set(CUDA_USE_STATIC_CUDA_RUNTIME ON)
+endif()
+
 find_package(CUDA 7.0 REQUIRED)
 
 if(NOT CUDA_FOUND)