From: John Carter <john.carter@...>
Date: 2007-03-28T11:38:52+09:00
Subject: Ruby & gprof and thread.so undefined reference to 	rb_thread_critical

So I was sitting there glaring at the screen whilst my script went off
and did lots and lots.....
....and started to think wonder how I could make it a little faster....

After all, I have thrown every trick in the
   http://www.rubygarden.org:3000/Ruby/page/show/RubyOptimization
book at the Ruby level (indeed I wrote a most of that)

Now I started to wonder if I could tweak Ruby itself to run a little faster...

So profile first...

CFLAGS='-p -pg -O2' LDFLAGS='-p -pg' ./configure --program-suffix=-profile
make CFLAGS='-p -pg -O2' LDFLAGS='-p -pg'
su
make install CFLAGS='-p -pg -O2' LDFLAGS='-p -pg'

It seems to work and run for the basic stuff, lets hit the Big Script...

Oh dear!
   undefined reference to rb_thread_critical in thread.so

Oh, dear.

Here's the shortest bit that triggers it...

irb-profile -rthread
/usr/local/lib/ruby/1.8/i686-linux/thread.so: /usr/local/lib/ruby/1.8/i686-linux/thread.so: undefined symbol: rb_thread_critical - /usr/local/lib/ruby/1.8/i686-linux/thread.so (LoadError)
 					      from /usr/local/lib/ruby/1.8/thread.rb:5
 					      from /usr/local/lib/ruby/1.8/irb/init.rb:252:in `require'
 					      from /usr/local/lib/ruby/1.8/irb/init.rb:252:in `load_modules'
 					      from /usr/local/lib/ruby/1.8/irb/init.rb:250:in `each'
 					      from /usr/local/lib/ruby/1.8/irb/init.rb:250:in `load_modules'
 					      from /usr/local/lib/ruby/1.8/irb/init.rb:21:in `setup'
 					      from /usr/local/lib/ruby/1.8/irb.rb:54:in `start'
 					      from /usr/local/bin/irb-profile:13

Anyone with any guesses what to do?


John Carter                             Phone : (64)(3) 358 6639
Tait Electronics                        Fax   : (64)(3) 359 4632
PO Box 1645 Christchurch                Email : john.carter@tait.co.nz
New Zealand