dlopen is failing on Window XP works great on Window 2000

[WATANABE Hirofumi]

Michael Davis <mdavis@sevasoftware.com> writes:

> I created a very small C library for Ruby. It compilies and works great on Windows 2000 using cygwin. On Windows XP, however, I get the following run-time error:
>
> Exception `LoadError' at /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4 - dlopen: Win32 error 5 - /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4:in `require': dlopen: Win32 error 5 - /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so (LoadError)
> from /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4
> from /usr/local/lib/ruby/site_ruby/1.6/locana/locana_bindings.rb:101:in `require'
> from /usr/local/lib/ruby/site_ruby/1.6/locana/locana_bindings.rb:101
> from /usr/local/lib/ruby/site_ruby/1.6/locana.rb:279:in `require'
> from /usr/local/lib/ruby/site_ruby/1.6/locana.rb:279
> from tst/tst_locana.rb:15:in `require'
> from tst/tst_locana.rb:15
>
> Has anyone seen this error before and/or have any suggestions on how to work around it? I an running the latest cygwin on XP. The gcc compiler is gcc version 3.2 20020927 (prerelease).
>
> Any suggestions on how to work around this issue is greatly appreciated.

Check the permission of the so file:

$ ls -l /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so

It needs execute permission.

--
eban

[Michael Davis]

This was a great suggestion but the permissions were alreay set properly. I successfully worked around this issue by running make install and eliminated moving the binary to a locana sub-directory. However, now I am faced with another issue where calling simple Win32API functions such as CreateWindow are failing. Any other suggestions?

WATANABE Hirofumi wrote:

> Michael Davis <mdavis@sevasoftware.com> writes:
>
>

>>I created a very small C library for Ruby. It compilies and works great on Windows 2000 using cygwin. On Windows XP, however, I get the following run-time error:
>>
>>Exception `LoadError' at /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4 - dlopen: Win32 error 5 - /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4:in `require': dlopen: Win32 error 5 - /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so (LoadError)
>> from /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32.rb:4
>> from /usr/local/lib/ruby/site_ruby/1.6/locana/locana_bindings.rb:101:in `require'
>> from /usr/local/lib/ruby/site_ruby/1.6/locana/locana_bindings.rb:101
>> from /usr/local/lib/ruby/site_ruby/1.6/locana.rb:279:in `require'
>> from /usr/local/lib/ruby/site_ruby/1.6/locana.rb:279
>> from tst/tst_locana.rb:15:in `require'
>> from tst/tst_locana.rb:15
>>
>>Has anyone seen this error before and/or have any suggestions on how to work around it? I an running the latest cygwin on XP. The gcc compiler is gcc version 3.2 20020927 (prerelease).
>>
>>Any suggestions on how to work around this issue is greatly appreciated.

>
>
> Check the permission of the so file:
>
> $ ls -l /usr/local/lib/ruby/site_ruby/1.6/locana_gui_mswin32_ext.so
>
> It needs execute permission.
>