http://code.google.com/p/game-music-emu/issues/detail?id=8

Index: game-music-emu-0.5.5/gme/CMakeLists.txt
===================================================================
--- game-music-emu-0.5.5.orig/gme/CMakeLists.txt
+++ game-music-emu-0.5.5/gme/CMakeLists.txt
@@ -157,7 +157,6 @@ set_target_properties(gme
     PROPERTIES VERSION 0.5.3
                SOVERSION 0)
 
-# TODO: Libsuffix for 64-bit?
-install(TARGETS gme LIBRARY DESTINATION lib)
+install(TARGETS gme LIBRARY DESTINATION lib${LIB_SUFFIX})
 
 install(FILES ${EXPORTED_HEADERS} DESTINATION include/gme)