cmake: fix compilation issue on WIN32

CMakeLists.txt

@@ -130,7 +130,11 @@ SET(${PROJECT_NAME}_SOURCES
 )
 
 ADD_LIBRARY(${PROJECT_NAME} SHARED ${${PROJECT_NAME}_SOURCES} ${${PROJECT_NAME}_HEADERS})
-TARGET_COMPILE_OPTIONS(${PROJECT_NAME} PRIVATE $<$<CXX_COMPILER_ID:MSVC>:-bigobj> "-Wno-conversion")
+IF(NOT WIN32)
+  TARGET_COMPILE_OPTIONS(${PROJECT_NAME} PRIVATE $<$<CXX_COMPILER_ID:MSVC>:-bigobj> "-Wno-conversion")
+ELSE()
+  TARGET_COMPILE_OPTIONS(${PROJECT_NAME} PRIVATE $<$<CXX_COMPILER_ID:MSVC>:-bigobj>)
+ENDIF()
 
 TARGET_LINK_BOOST_PYTHON(${PROJECT_NAME})
 PKG_CONFIG_USE_DEPENDENCY(${PROJECT_NAME} eigen3)