rb_econv_prepare_options  305 include/ruby/encoding.h int rb_econv_prepare_options(VALUE opthash, VALUE *ecopts, int ecflags);
rb_econv_prepare_options 5384 io.c           	ecflags = rb_econv_prepare_options(opthash, &ecopts, ecflags);
rb_econv_prepare_options 9461 io.c           	ecflags = rb_econv_prepare_options(opt, &ecopts, ecflags);
rb_econv_prepare_options 9475 io.c                           ecflags = rb_econv_prepare_options(opt, &ecopts, ecflags);
rb_econv_prepare_options 2571 transcode.c        return rb_econv_prepare_options(opthash, opts, 0);