Use UNIX settings for MINGW which is gcc based.

Author: t-paul

CMakeLists.txt

@@ -96,7 +96,7 @@ add_library(${PROJECT_NAME}_s STATIC ${SRCS_MAIN_PLATFORM} ${SRCS_COMMON})
 target_include_directories(${PROJECT_NAME}_s PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/Include)
 target_include_directories(${PROJECT_NAME}_s PUBLIC ${CMAKE_CURRENT_BINARY_DIR}/Include)
 SET_TARGET_PROPERTIES(${PROJECT_NAME}_s PROPERTIES PREFIX "" IMPORT_PREFIX "")
-if (UNIX)
+if (UNIX OR MINGW)
 	target_compile_options(${PROJECT_NAME}_s PUBLIC "-fPIC")
 	# Uncomment the following to but the version info into the .so-file.
 	SET_TARGET_PROPERTIES(${PROJECT_NAME}_s PROPERTIES VERSION "${LIB3MF_VERSION_MAJOR}.${LIB3MF_VERSION_MINOR}.${LIB3MF_VERSION_MICRO}.${BUILD_NUMBER}")
@@ -125,7 +125,7 @@ add_library(${PROJECT_NAME} SHARED ${SRCS_MAIN_PLATFORM}
 set(STARTUPPROJECT ${PROJECT_NAME})
 SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES PREFIX "" IMPORT_PREFIX "")
 target_link_libraries(${PROJECT_NAME} ${PROJECT_NAME}_s)
-if (UNIX)
+if (UNIX OR MINGW)
 	# Uncomment the following to but the version info into the .so-file.
 	SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES VERSION "${LIB3MF_VERSION_MAJOR}.${LIB3MF_VERSION_MINOR}.${LIB3MF_VERSION_MICRO}.${BUILD_NUMBER}")
 	SET_TARGET_PROPERTIES(${PROJECT_NAME} PROPERTIES SOVERSION "${LIB3MF_VERSION_MAJOR}")