cmake : use BUILD_SHARED_LIBS

src/CMakeLists.txt

@@ -2,7 +2,7 @@
 
 set(TARGET ggwave)
 
-add_library(${TARGET} ${GGWAVE_LIBRARY_TYPE}
+add_library(${TARGET}
     ggwave.cpp
     )
 
@@ -11,7 +11,7 @@ target_include_directories(${TARGET} PUBLIC
     ../include
     )
 
-if (GGWAVE_LIBRARY_TYPE STREQUAL "SHARED")
+if (BUILD_SHARED_LIBS)
     target_link_libraries(${TARGET} PUBLIC
         ${CMAKE_DL_LIBS}
         )