I know must be itching right now, but if you give me a couple of days to put a step by step guide everybody would benefit.

Basically the mysql gem available would not work, it broken for 1.9, so you need to use my project at GitHub.

On the Mongrel side, there are lot of things that need improvement over there.

I only have Ruby 1.9 in the path – I put 1.8 in there only for a few minutes, for testing whether mysql works with 1.8. It did, so you’re certainly right about me getting an 1.8 precompiled version. I’ll look into this again. Currently extconf.rb fails, not finding mysql_query() in -lmysqlclient, eventhough I do have libmySQL.dll available through the path. I don’t seem to be the only one with that problem though, I’m sure I’ll find a solution soon.

gem install mongrel --platform=ruby

doesn’t seem to work either, it gives me the error “http11.c:77: error: structure has no member named `ptr’”:

http://www.haslo.ch/temp-pics/Ruby-Nocompile.jpg

It seems that the version of the gem I got doesn’t have these fixes here:
http://rubyforge.org/pipermail/mongrel-users/2008-April/005278.html – and if I attempt to change the C file by hand and then gem install again, the file reverts to its previous version, probably because of the package system?

You installed the binary of mongrel for mingw32 platform, but for the wrong version of ruby.

The binary of Mongrel was built for 1.8 version of Ruby, not for 1.9!

You need to remove the binary gem and install the one labeled as “ruby”, so:

gem install mongrel --platform=ruby should do the trick.

Anyhow, as I mentioned here, 1.1.5 gem got released but I’m not 100% sure it got all the MinGW fixes in.

regarding MySQL, you’re facing the exact same problem I mentioned before: running compiled extension for 1.8 against 1.9, that is not going to work.

I believe that is happening because you have both 1.9 and 1.8 on your PATH environment.

I know is hard to follow and understand all those little details, but this is exactly the same under any kind of operating system.

D:\Rails\testproject>ruby script/server
F:/Ruby/lib/ruby/gems/1.9.1/gems/mongrel-1.1.5-x86-mingw32/lib/http11.so: [BUG] Segmentation fault
ruby 1.9.1p129 (2009-05-12 revision 23412) [i386-mingw32]

– control frame ———-
c:0019 p:-14382694 s:0073 b:0073 l:000072 d:000072 TOP
c:0018 p:—- s:0071 b:0071 l:000070 d:000070 CFUNC :require
c:0017 p:0012 s:0067 b:0067 l:000056 d:000066 BLOCK F:/Ruby/lib/ruby/gems/1.9.1/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156

Any idea what I’m doing wrong? (And huge thanks for your help!)
(Concerning MySQL, 5.0 didn’t work for me either – I installed the 5.0 essentials, ran the service, even made the database, and rake db:migrate would produce exactly the same segfault error as it did with 5.1)

I’ll try to write a post as tutorial for people to contribute and spot those issues, but dunno if that will help.