((mkmf doesn't create HAVE_X definitions, so HAVE_RL_PROMPT_START_IGNORE
and HAVE_RL_PROMPT_END_IGNORE don't actually get defined by
ext/readline/extconf.rb. Instead, we should detect for
RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE directly.))
=end
This issue was solved with changeset r39002.
Zachary, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.
ext/readline/extconf.rb, ext/readline/readline.c: check
RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE directly in
readline.c. Patch by Zachary Scott. [Bug #7397] [ruby-core:49561]