require 'mkmf' $LDFLAGS = "-L/usr/local/lib"; $CFLAGS = "-I/usr/local/include"; have_library( "xpg4", "setlocale" ); have_header( "locale.h" ); if ( have_header( "libintl.h" ) and (have_library( "intl", "gettext" , "libintl.h" ) or have_func( "gettext" )) ) create_makefile( "intl" ); end