Enabling readline support in 1.9.0?

[David Brady]

Hello,

I installed ruby 1.8.2 and irb as Kubuntu packages, but ran into
problems with threading. The solution was to grab ruby from CVS, so now
I'm running the stable snapshot of 1.9.0.

I notice that up arrow no longer works to scroll back through the
command history in irb. My suspicion is that I have compiled Ruby
without readline support. When I try to require 'irb/completion', I get
this error:

irb(main):001:0> require 'irb/completion'
LoadError: no such file to load -- readline
from /usr/local/lib/ruby/1.9/irb/completion.rb:10:in `require'
from /usr/local/lib/ruby/1.9/irb/completion.rb:10
from (irb):1:in `irb_binding'
from /usr/local/lib/ruby/1.9/irb/workspace.rb:52:in `irb_binding'
from /usr/local/lib/ruby/1.9/irb/workspace.rb:52
Maybe IRB bug!!

I suspect ruby rather than irb because removing the irb package and
reinstalling it has no effect. Does this sound likely? If so, how do I
enable readline support?

Thanks,

-dB

 

[nobu.nokada]

Hi,

At Sat, 9 Jul 2005 10:50:00 +0900,
David Brady wrote in [ruby-talk:147622]:

I installed ruby 1.8.2 and irb as Kubuntu packages, but ran into
problems with threading. The solution was to grab ruby from CVS, so now
I'm running the stable snapshot of 1.9.0.

1.9.0 is not a "stable" version. You would mean the "latest"
snapshot.

I suspect ruby rather than irb because removing the irb package and
reinstalling it has no effect. Does this sound likely? If so, how do I
enable readline support?

ext/readline/extconf.rb apparently failed to detect readline
library. Can't you show the mkmf.log file in that directory?

 

[daz]

Hello,

I installed ruby 1.8.2 and irb as Kubuntu packages, but ran into
problems with threading. The solution was to grab ruby from CVS, so now
I'm running the stable snapshot of 1.9.0.

Stable snapshot currently means 1.8 ... Snapshot is 1.9

I take it you're on 1.9 so you probably have readline.so in
lib/ruby/1.8/ix86-xxxxxxxx
.... but not in
lib/ruby/1.9/ix86-xxxxxxxx

irb(main):001:0> require 'irb/completion'
LoadError: no such file to load -- readline

Maybe IRB bug!!

Nooo, never.

I suspect ruby rather than irb because removing the irb package and
reinstalling it has no effect. Does this sound likely? If so, how do I
enable readline support?

Install it for 1.9 ?
You could try copying to the 1.9 dir if you enjoy taking risks ;-)


daz

 

[David Brady]

1.9.0 is not a "stable" version. You would mean the "latest"
snapshot.

Errrrk! I am very new to Ruby, and I appear to have wandered off the
path and been eaten by bears.

I was advised (in an earlier thread on this list) to get the latest
tcltklib.c from CVS. I am rather clumsy at building projects under
linux, however, so I probably did something wrong. Ohh, I know what it
was: I grabbed the latest stable (1.8.2), and its README gave
instructions on how to "get it from anonymous CVS". I did *that*, which
appears to have given me 1.9.0.

So. Um. Is my Ruby now unstable? Wheee!

I guess I should have thought more carefully about what I was originally
advised to do: I should have gotten the 1.9.0 sources, copied just
tcltklib.c into the 1.8.2 sources, and built *that*.

...I think. Heh. Every day's a new adventure with Ruby.

ext/readline/extconf.rb apparently failed to detect readline
library. Can't you show the mkmf.log file in that directory?

Ah! Now there's a file with some useful information in it! (Nevermind
RTFM, my problem is KTTFMEE: Knowing That The F(antastic) Manual Even
Exists.)

I think the beginnings of my problem are right at the beginning of the
log, in:

have_library: checking for tgetnum() in -lncurses... -------------------- no

"gcc -o conftest -I../.. -I../../. -g -O2 conftest.c -L'../..' -lruby-static -lncurses -lpthread -ldl -lcrypt -lm -lc"
/usr/bin/ld: cannot find -lncurses
collect2: ld returned 1 exit status

The entire log is posted here:

http://www.shinybit.com/readline_mkmf.log

I am going to try to fall back to the 1.8.2 build (with the upgraded
tcltklib.c). Any advice on this issue would still be appreciated,
however. I don't see how 1.8.2 will be able to find ncurses if 1.9.0
couldn't. Keep in mind that I have installed most of my packages using
Kubuntu's apt. There's no telling what I'm missing.

Thanks,

-dB

 

[nobu.nokada]

Hi,

At Sun, 10 Jul 2005 03:44:12 +0900,
David Brady wrote in [ruby-talk:147672]:

The entire log is posted here:

http://www.shinybit.com/readline_mkmf.log

Have you installed the headers of readline? Maybe
readline-devel package or something else?

 

[David Brady]

Have you installed the headers of readline? Maybe
readline-devel package or something else?

That worked!

I installed libreadline5-dev and it's dependency, libncurses5-dev. Ruby
compiles happily now, and irb gives readline support.

Thank you,

-dB