Cross Compiling Ruby Extension

bct · October 18, 2006, 9:59am

Hello,

I’m attempting to cross compile a ruby extension for Windows from a
Linux
box.
Im running Ubuntu 6.06, Ruby 1.8.5, and mingw gcc 3.4.4.

I attempted to follow Mauricio F.'s instructions
http://eigenclass.org/hiki.rb?cross+compiling+rcovrt#f01

The file compiled but it appears that it is still a Linux binary.
json_ext.so: ELF 32-bit LSB shared object, Intel 80386, version 1
(SYSV),
not stripped

Is there something that I may be missing?

Thank you,
Brian T.

bct · October 18, 2006, 3:54pm

On 10/18/06, Brian T. [email protected] wrote:

I’m attempting to cross compile a ruby extension for Windows from a Linux
box.
Im running Ubuntu 6.06, Ruby 1.8.5, and mingw gcc 3.4.4.

I don’t recommend doing this if you want your extension to be
compatible with the current Windows Ruby release.

-austin

bct · October 18, 2006, 7:46pm

On 10/18/06, Austin Z. [email protected] wrote:

On 10/18/06, Brian T. [email protected] wrote:

I’m attempting to cross compile a ruby extension for Windows from a
Linux
box.
Im running Ubuntu 6.06, Ruby 1.8.5, and mingw gcc 3.4.4.

I don’t recommend doing this if you want your extension to be
compatible with the current Windows Ruby release.

Thanks for your reply. I’m at my wit’s end in compiling ruby extensions
on
Windows. Ruby 1.8.5 is compiled under VC 6, right?

Its too bad that is very difficult to compile extensions for Windows.

Do you mind if I pick your brain at the conference?

-austin

bct · October 18, 2006, 8:50pm

On 10/18/06, Brian T. [email protected] wrote:

Its too bad that is very difficult to compile extensions for Windows.

Do you mind if I pick your brain at the conference?

You can try – I’m going to be interested in picking a lot of peoples’
brains at the conference about this issue. See a notice that I’ll be
posting later tonight.

-austin

bct · October 18, 2006, 9:00pm

On Wed, Oct 18, 2006 at 10:52:55PM +0900, Austin Z. wrote:

On 10/18/06, Brian T. [email protected] wrote:

I’m attempting to cross compile a ruby extension for Windows from a Linux
box.
Im running Ubuntu 6.06, Ruby 1.8.5, and mingw gcc 3.4.4.

I don’t recommend doing this if you want your extension to be
compatible with the current Windows Ruby release.

Isn’t mingw supposed to be compatible with the MSVC (which the
One Click Installer uses now instead of some newer VC++) builds?

Ara mentioned some incompatibility on ruby-core (a problem with isascii
IIRC)
but it had been solved in CVS for a while.

bct · October 18, 2006, 8:54pm

On Wed, Oct 18, 2006 at 04:58:53PM +0900, Brian T. wrote:

json_ext.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV),
not stripped

You are using mkrf instead of mkmf, so things work a bit differently.

$ cat extconf.rb
require ‘rubygems’
require ‘mkrf’

dir = File.dirname(FILE)
Mkrf::Generator.new(‘json_ext’, “#{dir}/*.c”)
$ cat > extconf.rb
require ‘mkmf’
create_makefile “json_ext”
$ ruby -I ~/usr/ruby-mingw32/lib/ruby/1.8/i386-mingw32 extconf.rb
/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32/rbconfig.rb:7: ruby
lib version (1.8.4) doesn’t match executable version (1.8.5)
(RuntimeError)
from /home/batsman/usr//lib/ruby/1.8/mkmf.rb:4:in require' from /home/batsman/usr//lib/ruby/1.8/mkmf.rb:4 from extconf.rb:1:inrequire’
from extconf.rb:1

[use vim to edit rbconfig.rb and remove/comment the version check if the
native & cross-compiled ruby version differ]

$ ruby -I ~/ruby-mingw32/lib/ruby/1.8/i386-mingw32/ extconf.rb
creating Makefile
$ make
i586-mingw32msvc-gcc -I.
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32 -I. -g -O2 -c
json_ext.c
i586-mingw32msvc-gcc -shared -s -Wl,–enable-auto-import,–export-all
-L"/home/batsman/ruby-mingw32/lib" -o json_ext.so json_ext.o
-lmsvcrt-ruby18 -lwsock32
$ file json_ext.so
json_ext.so: MS Windows PE 32-bit Intel 80386 console DLL

bct · October 19, 2006, 7:43am

On 10/18/06, Brian T. [email protected] wrote:

$ cat extconf.rb
lib version (1.8.4) doesn’t match executable version (1.8.5)
creating Makefile

Thanks for demoing this. I’ll give it a shot.

It looks like the compile worked. I did not run make install on mingw.

There where a couple of issues with the install task, such as
rubyw.exemissing and the .ext directory missing.
To resolve this I copied ruby.exe to rubyw.exe and the ext directory to
.ext

Thank you,
Brian

–

bct · October 19, 2006, 7:47am

On 10/18/06, Austin Z. [email protected] wrote:

Thanks for your reply. I’m at my wit’s end in compiling ruby extensions
on
Windows. Ruby 1.8.5 is compiled under VC 6, right?

Its too bad that is very difficult to compile extensions for Windows.

Do you mind if I pick your brain at the conference?

You can try – I’m going to be interested in picking a lot of peoples’
brains at the conference about this issue. See a notice that I’ll be
posting later tonight.

Yes. It would be good to look for a resolution to this issue at the
conference. I cant wait to read your post.

-austin

bct · October 19, 2006, 4:02am

On 10/18/06, Mauricio F. [email protected] wrote:

eigenclass.org
require ‘mkrf’
from /home/batsman/usr//lib/ruby/1.8/mkmf.rb:4:in `require’
i586-mingw32msvc-gcc -I.
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32 -I. -g -O2 -c
json_ext.c
i586-mingw32msvc-gcc -shared -s
-Wl,–enable-auto-import,–export-all -L"/home/batsman/ruby-mingw32/lib" -o
json_ext.so json_ext.o -lmsvcrt-ruby18 -lwsock32
$ file json_ext.so
json_ext.so: MS Windows PE 32-bit Intel 80386 console DLL

Thanks for demoing this. I’ll give it a shot.

–

Mauricio F. - http://eigenclass.org - singular Ruby

On 10/18/06, Mauricio F. <[email protected]> wrote:

On Wed, Oct 18, 2006 at 04:58:53PM +0900, Brian T. wrote:
>
Hello,
>
> I’m attempting to cross compile a ruby extension
for Windows from a Linux
> box.
> Im running Ubuntu 6.06,
Ruby 1.8.5
, and mingw gcc 3.4.4.
>
> I attempted to follow Mauricio
Fernandez’s instructions
> http://eigenclass.org/hiki.rb?cross+compiling+rcovrt#f01

>
> The file compiled but it appears that it is still a
Linux binary.
> json_ext.so: ELF 32-bit LSB shared object, Intel
80386, version 1 (SYSV),
> not stripped

You are using mkrf
instead of mkmf, so things work a bit differently.

$ cat extconf.rb
require ‘rubygems’
require
‘mkrf’

dir =
File.dirname(FILE)
Mkrf::Generator.new(‘json_ext’,
"#{dir}/*.c")
$ cat > extconf.rb
require
‘mkmf’
create_makefile "json_ext"

$ ruby -I ~/usr/ruby-mingw32/lib/ruby/1.8/i386-mingw32
extconf.rb
/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32/rbconfig.rb:7:
ruby lib version (1.8.4) doesn’t match executable version (1.8.5)
(RuntimeError)

        from
/home/batsman/usr//lib/ruby/1.8/mkmf.rb:4:in
require'<br>        from /home/batsman/usr//lib/ruby/1.8/mkmf.rb:4<br>        from extconf.rb:1:in require’
        from
extconf.rb:1

[use vim to edit
rbconfig.rb and remove/comment the version check if the
native &
cross-compiled ruby version differ]

$ ruby -I
~/ruby-mingw32/lib/ruby/1.8/i386-mingw32/ extconf.rb
creating
Makefile
$ make
i586-mingw32msvc-gcc -I.
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32
-I/home/batsman/ruby-mingw32/lib/ruby/1.8/i386-mingw32 -I.  -g
-O2   -c json_ext.c

i586-mingw32msvc-gcc -shared -s
-Wl,–enable-auto-import,–export-all  -L"/home/batsman/ruby-mingw32/lib"
-o json_ext.so
json_ext.o  -lmsvcrt-ruby18  -lwsock32
$ file
json_ext.so
json_ext.so: MS Windows PE 32-bit Intel 80386 console DLL

Thanks for demoing this. I'll give it a shot.

--
Mauricio F. - http://eigenclass.org - singular Ruby