That looks pretty good.

On 23 March 2010 23:59, macarthy <justin.maccarthy@gmail.com> wrote:

>
> Done  - feel free to improve it
> http://wiki.github.com/ffi/ffi/using-ruby-ffi-on-osx-with-mixed-architectures-universal-binaries
>
> Justin
>
> On Mar 10, 9:46 am, Wayne Meissner <wmeiss...@gmail.com> wrote:

>> You are now the honorary universal binary expert for ruby-ffi on
>> MacOS.  Turn your email thread into a FAQ and put it up on the wiki.
>>
>> On 10 March 2010 00:56, macarthy <justin.maccar...@gmail.com> wrote:
>>
>>
>>

>> > Answering my own question, since I can't recompile the lib as 64bit I
>> > was able to run ruby as 32 bit and ffi works fine, Commands and output
>> > below.

>>

>> > $ lipo -info /usr/local/lib/libmylib.dylib
>> > Non-fat file: /usr/local/lib/libmylib.dylib is architecture: i386

>>

>> > $ lipo -detailed_info /usr/bin/ruby
>> > Fat header in: /usr/bin/ruby
>> > fat_magic 0xcafebabe
>> > nfat_arch 3
>> > architecture x86_64
>> >    cputype CPU_TYPE_X86_64
>> >    cpusubtype CPU_SUBTYPE_X86_64_ALL
>> >    offset 4096
>> >    size 14176
>> >    align 2^12 (4096)
>> > architecture i386
>> >    cputype CPU_TYPE_I386
>> >    cpusubtype CPU_SUBTYPE_I386_ALL
>> >    offset 20480
>> >    size 14112
>> >    align 2^12 (4096)
>> > architecture ppc7400
>> >    cputype CPU_TYPE_POWERPC
>> >    cpusubtype CPU_SUBTYPE_POWERPC_7400
>> >    offset 36864
>> >    size 13904
>> >    align 2^12 (4096)

>>

>> > $ arch -arch i386 /usr/bin/ruby libmylib.rb

>>

>> >> Hi all,

>>

>> >> Can someone explain this error ? Obviously an architecture mismatch of
>> >> some sort, how does one got about fixing this? Or compile libmylib as
>> >> a different arch (or as several ? )

>>

>> >> /Library/Ruby/Gems/1.8/gems/ffi-0.6.2/lib/ffi/library.rb:61:in
>> >> `ffi_lib': Could not open library 'libmylib.dylib':
>> >> dlopen(libmylib.dylib, 9): no suitable image found.  Did find:
>> >> (LoadError)

>>

>> >> /usr/local/lib/libmylib.dylib: mach-o, but wrong architecture. Could
>> >> not open library 'libmylib': dlopen(libmylib, 9): image not found
>> >>         from /Library/Ruby/Gems/1.8/gems/ffi-0.6.2/lib/ffi/library.rb:
>> >> 43:in `map'
>> >>         from /Library/Ruby/Gems/1.8/gems/ffi-0.6.2/lib/ffi/library.rb:
>> >> 43:in `ffi_lib'
>> >>         from xxx.rb:14

>>

>> >> otool gives me this ...

>>

>> >>  otool -h /usr/local/lib/libmylib.dylib

>>

>> >> /usr/local/lib/libmylib.dylib:
>> >> Mach header
>> >>       magic cputype cpusubtype  caps    filetype ncmds sizeofcmds
>> >> flags
>> >>  0xfeedface       7          3  0x00          6    20       2404
>> >> 0x00118085

>>

>> >> Thanks

>
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