[elephant-devel] 0.6.1 / OpenMCL / BDB

Ian Eslick eslick at csail.mit.edu
Wed Jan 24 16:39:40 UTC 2007

This is a problem with assumptions about *features*

On Darwin we should be loading .dylib which is generated by the - 
bundle option to gcc/ld

UFFI looks for tags in *features* as follows to determine the lib  
type to load:

(defun foreign-library-types ()
   "Returns list of string naming possible library types for  
platform, sorted by preference"
   #+(or win32 mswindows) '("dll" "lib")
   #+(or macosx darwin ccl-5.0) '("dylib" "bundle")
   #-(or win32 mswindows macosx darwin ccl-5.0) '("so" "a" "o")

Our compile script in elephant.asd relies on darwin/macosx as the  
indicator as to what kind of library to produce (-shared vs. - 
bundle).  I have no idea why OpenMCL changed the *features* list!   
Very annoying.

I notice that :darwin-host is on the list to differentiate  
from :darwin-target, presumably to allow cross-compilation.

I think the right solution is to push :macosx onto the *features*  
list for now so everything just works.  Do this before you load  
elephant.  Perhaps we can find out from the OpenMCL folks what the  
right *feature* is to rely on before we modify our script and ask the  
UFFI maintainer to add new tags to update foreign-library-types to  
accommodate OpenMCL 1.1


On Jan 24, 2007, at 11:22 AM, lists at infoway.net wrote:

> I have been trying to make 0.6.1 work under OpenMCL Version 1.1- 
> pre-061231 (DarwinX8664). However, as I mentioned before, I have  
> been having compilation problems.
> They seem to be mainly related to libmemutil.
> Out of the box attempt, I got the following error:
> ; $ /usr/bin/gcc -shared -Wall -fPIC -O3 -o /Users/dev/lisp/ 
> elephant/src/memutil/libmemutil.so /Users/dev/lisp/elephant/src/ 
> memutil/libmemutil.c -lm
> i686-apple-darwin8-gcc-4.0.1: unrecognized option '-shared'
> /usr/bin/ld: Undefined symbols:
> _main
> collect2: ld returned 1 exit status
> Upon inspection of elephant.asd, I made the following change:
> (defmethod compiler-options ((compiler (eql :gcc)) (c elephant-c- 
> source) &key input-file output-file)
>   "Default compile and link options to create a library; no -L or - 
> I options included; math lib as default"
>   (unless (and input-file output-file)
>     (error "Must specify both input and output files"))
>   (list
>    #-(or openmcl darwin macosx) "-shared"
>    #+(or openmcl darwin macosx) "-bundle"
>    "-Wall"
>    "-fPIC"
>    "-O3"
>    "-o" output-file
>    input-file
>    "-lm"))
> What I basically did is I added "openmcl" to the conditionalization  
> #- and #+. After making this change, it successfully builds the  
> libmemutil.so file. However, while the file actually exists, it  
> fails to load with the following message:
> Error opening shared library "/Users/dev/lisp/elephant/src/memutil/ 
> libmemutil.so": dlopen(/Users/dev/lisp/elephant/src/memutil/ 
> libmemutil.so, 10): no suitable image found.  Did find:
> 	/Users/dev/lisp/elephant/src/memutil/libmemutil.so: mach-o, but  
> wrong architecture
>    [Condition of type SIMPLE-ERROR]
> FYI, my *FEATURES* is:
> CONSING :X86-64 :X86-64 :X86-TARGET :X86-HOST :X8664-TARGET :X8664- 
> I don't really know why it cannot load the shared library. I don't  
> know if the problem is basically a compat issue with this CVS  
> version of OpenMCL in this architecture and/or UFFI. However, I  
> thought I would share this just in case anyone has information that  
> could speed this process or any suggestions of what I may try next.
> Thanks,
> Daniel
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> elephant-devel at common-lisp.net
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