From: Roger Pack <rogerdpack2@...>
Date: 2010-01-28T11:43:34+09:00
Subject: [ruby-core:27919] sometimes methods don't appear?

I've noticed that with a couple of binary gems [1]

The gems compile and
require 'gem_name.so'

works great with 1.8

However, with 1.9, the
require 'gem_name.so'

line yields something like

   LoadError: 127: The specified procedure could not be found.   -
Init_serialport

And indeed, if you run the "strings" command on the .so file, it
doesn't appear to be in there.

After some blind wandering, it appears that either adding a

__declspec(dllexport)

to the Init_ method, or adding

--export-all to RbConfig::CONFIG['LIBRUBY_DLDFLAGS']

fixes the problem.

Is the lack of --export-all (it was there in 1.8, but isn't in 1.9)
and its attendant difficulties expected?

Thanks!
-rp
[1] serialport, rjb
http://groups.google.com/group/rubyinstaller/browse_thread/thread/92ecf042368082fb#