require 'mkmf' dir_config( 'lsapi' ) if ( have_library( "socket" )) have_library( "nsl" ) end if RUBY_VERSION =~ /1.9/ then $CPPFLAGS += " -DRUBY_19" end if RUBY_VERSION =~ /2/ then $CPPFLAGS += " -DRUBY_2" end create_makefile( "lsapi" )