The build system tries to link to installed system libraries first, which fails because the ABI has changed... Index: mlt-0.9.8/src/swig/ruby/build =================================================================== --- mlt-0.9.8.orig/src/swig/ruby/build +++ mlt-0.9.8/src/swig/ruby/build @@ -5,8 +5,10 @@ if ARGV.shift == 'clean' exit 0 end system( "ln -sf ../mlt.i" ) +system( "ln -sf ../../framework/libmlt.so" ) +system( "ln -sf ../../mlt++/libmlt++.so" ) system( "swig -c++ -ruby -I../../mlt++ -I../.. mlt.i" ) $CFLAGS += " -I../.. " + (ENV.has_key?('CXXFLAGS')? ENV['CXXFLAGS'] : '') -$LDFLAGS += " -L../../mlt++ -lmlt++" +$LIBS += " -lmlt++ -lmlt -lstdc++" create_makefile('mlt') system( "make" )