-set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wl,--as-needed")
-set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS} -O3")
-set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS} -g -O3")
-set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -g3 -O0")
+IF (MSVC)
+ set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /wd4244 /wd4267")
+ add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+ELSE ()
+ set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+ set (CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS} -O3")
+ set (CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS} -g -O3")
+ set (CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS} -g3 -O0")
+ENDIF ()
+
+# set system libraries
+SET (SYSTEM_LIBRARIES "")
+IF (ENABLE_RPMMD OR ENABLE_SUSEREPO OR ENABLE_APPDATA OR ENABLE_COMPS OR ENABLE_HELIXREPO OR ENABLE_MDKREPO)
+IF (WITH_LIBXML2 )
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${LIBXML2_LIBRARIES})
+ELSE (WITH_LIBXML2 )
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${EXPAT_LIBRARY})
+ENDIF (WITH_LIBXML2 )
+
+ENDIF (ENABLE_RPMMD OR ENABLE_SUSEREPO OR ENABLE_APPDATA OR ENABLE_COMPS OR ENABLE_HELIXREPO OR ENABLE_MDKREPO)
+IF (ENABLE_ZLIB_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${ZLIB_LIBRARY})
+ENDIF (ENABLE_ZLIB_COMPRESSION)
+IF (ENABLE_LZMA_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${LZMA_LIBRARY})
+ENDIF (ENABLE_LZMA_COMPRESSION)
+IF (ENABLE_BZIP2_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${BZIP2_LIBRARIES})
+ENDIF (ENABLE_BZIP2_COMPRESSION)
+IF (ENABLE_ZSTD_COMPRESSION)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${ZSTD_LIBRARY})
+ENDIF (ENABLE_ZSTD_COMPRESSION)
+IF (WITH_SYSTEM_ZCHUNK)
+SET (SYSTEM_LIBRARIES ${SYSTEM_LIBRARIES} ${ZCHUNK_LIBRARIES})
+ENDIF (WITH_SYSTEM_ZCHUNK)
+IF (ENABLE_RPMDB)
+SET (SYSTEM_LIBRARIES ${RPMDB_LIBRARY} ${SYSTEM_LIBRARIES})
+ENDIF (ENABLE_RPMDB)
+IF (ENABLE_HAIKU)
+SET (SYSTEM_LIBRARIES ${HAIKU_SYSTEM_LIBRARIES} ${SYSTEM_LIBRARIES})
+ENDIF (ENABLE_HAIKU)
+IF (HAVE_LINKER_AS_NEEDED)
+SET (SYSTEM_LIBRARIES "-Wl,--as-needed" ${SYSTEM_LIBRARIES})
+ENDIF (HAVE_LINKER_AS_NEEDED)