-libmod_ppm_la_SOURCES = main.cpp trgt_ppm.cpp trgt_ppm.h mptr_ppm.cpp mptr_ppm.h # trgt_mpg.cpp trgt_mpg.h
-libmod_ppm_la_LDFLAGS = -module -no-undefined
+libmod_ppm_la_SOURCES = main.cpp trgt_ppm.cpp trgt_ppm.h mptr_ppm.cpp mptr_ppm.h
+libmod_ppm_la_LDFLAGS = -module -no-undefined -avoid-version