[Cffi-devel] Problem With Lapack Libraries from Cygwin

[Luís Oliveira]

Hello Scott,

>From your description, it seems unlikely that CFFI is to blame. Can you
reproduce the crash using sb-alien:load-shared-object instead?

(sent from my phone)
On Oct 4, 2014 4:59 AM, "Scott Turner" <srt19170 at gmail.com> wrote:

> I have been using the Lisp Linear Algebra package (LLA) for about a year.
> It provides a Common Lisp interface to the BLAS and LAPACK libraries using
> CFFI.  I use SBCL on Windows and have been loading the BLAS and LAPACK
> libraries from Cygwin64.
>
> A couple of days ago I updated my Cygwin installation (because of the
> Shellshock vulnerability) and now when I load these libraries, my SBCL
> process crashes after a second or two.
>
> CL-USER> (ql:quickload "cffi")
> To load "cffi":
>   Load 1 ASDF system:
>     cffi
> ; Loading "cffi"
> ; Loading system definition for alexandria from
> C:/Users/Dad/quicklisp/dists/quicklisp/software/alexandria-20140826-git/alexandria.asd
> ; Registering #<SYSTEM "alexandria">
> ; Loading system definition for trivial-features from
> C:/Users/Dad/quicklisp/dists/quicklisp/software/trivial-features-20130312-git/trivial-features.asd
> ; Registering #<SYSTEM "trivial-features">
> ; Loading system definition for babel from
> C:/Users/Dad/quicklisp/dists/quicklisp/software/babel-20140713-git/babel.asd
> ; Registering #<SYSTEM "babel">
> .
> ("cffi")
> CL-USER> (cffi:load-foreign-library "CYGBLAS-0.DLL")
> #<CFFI:FOREIGN-LIBRARY CYGBLAS-0.DLL-872 "CYGBLAS-0.DLL">
> (crashed)
>
> The two libraries I load (CYGBLAS-0.DLL and CYGLAPACK-0.DLL) have not
> changed in about a year.  Other libraries (such as the DLLs found in
> Windows/System32) load without a problem.   The Lapack libraries in the
> Cygwin32 distribution are not recognized as valid Win32 applications by
> CFFI.  I've tried older versions of SBCL and CFFI with no success.
>
> I've replicated the problem exactly on a second machine.  It should be
> easy to test:  Install SBCL, install Cygwin64, install CFFI, and then try (cffi:load-foreign-library
> "CYGBLAS-0.DLL"). You may have to provide the full path.  Sometimes it
> takes a short while for the process to crash.
>
> I'm very baffled by the problem, and I hope someone on this list will have
> a fix or some ideas on how to debug the situation.  I'd also appreciate it
> if someone would see if the problem replicates on their machine.  Also, if
> someone has a source for alternate DLLs for BLAS and LAPACK that CFFI can
> load on Windows, I could try those to see if they have the same problem.
>
> Thanks!
>
> Scott Turner
>
>
>
>
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>
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