squash! examples : add dl to the list of libraries linked

Add guard to only link dl on non-Apple Unix systems.

Author: danbev

examples/CMakeLists.txt

@@ -61,7 +61,11 @@ add_library(${TARGET} STATIC
 
 include(DefaultTargetOptions)
 
-target_link_libraries(${TARGET} PRIVATE whisper ${COMMON_EXTRA_LIBS} dl)
+if(UNIX AND NOT APPLE)
+  target_link_libraries(${TARGET} PRIVATE whisper ${COMMON_EXTRA_LIBS} dl)
+else()
+  target_link_libraries(${TARGET} PRIVATE whisper ${COMMON_EXTRA_LIBS})
+endif()
 
 set_target_properties(${TARGET} PROPERTIES POSITION_INDEPENDENT_CODE ON)
 set_target_properties(${TARGET} PROPERTIES FOLDER "libs")