From: Steven Jenkins <steven.jenkins@...>
Date: 2005-04-13T15:52:45+09:00
Subject: Re: extensions on Windows

Steven Jenkins wrote:
> I'll give the .NET SDK download another hour or so :-(. As long as I'm
> here to keep restarting it after the connection resets, it'll finish
> eventually.

That turned out to be a bad wireless card, it seems.

After much setting of environment variables, or whatever Windows calls 
things like %LIB% and %INCLUDE%, I can build the .so file.

Here's what 'ruby setup.rb setup' shows me:

---> bin
<--- bin
---> lib
---> lib/jpl
<--- lib/jpl
<--- lib
---> ext
---> ext/jpl
---> ext/jpl/cradle
nmake

Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

         cl -nologo -MD -Zi -O2b2xg- -G6 -I. 
-Ic:/ruby/lib/ruby/1.8/i386-mswin32
-Ic:/ruby/lib/ruby/1.8/i386-mswin32 
-IC:/cygwin/home/sjenkins/ruby-cradle/ext/jpl/cradle  -I. -I./.. 
-I./../missing -c -Tccradleapi.c
cradleapi.c
         c:\ruby\bin\ruby -e "puts 'EXPORTS', 'Init_cradle'"  > 
cradle-i386-mswin32.def
         cl -nologo -LD -Fecradle.so cradleapi.obj msvcrt-ruby18.lib 
cradleapi.lib  oldnames.lib user32.lib advapi32.lib wsock32.lib  -link 
-incremental:no -debug -opt:ref -opt:icf -dll -libpath:"c:/ruby/lib" 
-def:cradle-i386-mswin32.def
    Creating library cradle.lib and object cradle.exp
<--- ext/jpl/cradle
<--- ext/jpl
<--- ext

That looks right, I guess. I'm compiling a SWIG wrapper called 
cradleapi.c, linking it with the vendor library cradleapi.lib, and 
making a shared object called cradle.so.

'ruby setup.rb install' looks reasonable:

---> bin
mkdir -p c:/ruby/bin/
install cradle_demo c:/ruby/bin/
<--- bin
---> lib
mkdir -p c:/ruby/lib/ruby/site_ruby/1.8/
---> lib/jpl
mkdir -p c:/ruby/lib/ruby/site_ruby/1.8/jpl
install cradle.rb c:/ruby/lib/ruby/site_ruby/1.8/jpl
<--- lib/jpl
<--- lib
---> ext
---> ext/jpl
---> ext/jpl/cradle
mkdir -p c:/ruby/lib/ruby/site_ruby/1.8/i386-msvcrt/jpl
install cradle.so c:/ruby/lib/ruby/site_ruby/1.8/i386-msvcrt/jpl
<--- ext/jpl/cradle
<--- ext/jpl
<--- ext

When I try to load the extension, however, I get a "Bad Image" dialog 
box that says "The application or DLL [....]\jpl\cradle.so is not a 
valid Windows image. Please checdk this against your installation 
diskette." I've checked obvious things like permissions, etc.

As far as I can tell, cradle.so is opaque. I have no idea how to tell 
what's wrong with it. Any suggestions?

Steve