[cffi-devel] Problem with cffi-grovel on windows/cygwin(mingw mode)

[Reini Urban]

2010/7/1 Heka Treep <zena.treep at gmail.com>:
> Hi, some problem I have with this:
>
> (defsystem
>  ...
>  (cffi-grovel:wrapper-file "...")
>  ...
>
> generates a call:
>
> gcc -m32 -fPIC -o *.dll *.c -shared
>
> but cygwin want at least flag `-mno-cygwin'. It would be possible to
> define this flag in some variable, but the flag is added to the end of
> the list of arguments - and it just not work.

cygwin does not want, neither support -mno-cygwin anymore.
It was used for the old mingw cross-compiler, never for cygwin.
-fPIC is also invalid for mingw/cygwin.

> I try this format:
>
> gcc cpu-flags cc-flags platform-library-flags* -o output-file input-file
>
> by reimplement `cc-compile-and-link' function:
>
> ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
> (in-package :cffi-grovel)
>
> (defun cc-compile-and-link (input-file output-file &key library)
>  (apply #'invoke (or (getenv "CC") *cc*)
>         *cpu-word-size-flags*
>         `(,@*cc-flags*
>           ,@(when library *platform-library-flags*)
>           "-o"
>           ,(native-namestring output-file)
>           ,(native-namestring input-file))))
>
> (setf *cc* "C:/dev/cygwin/bin/gcc-3.exe") ;; its my
> (setf *cc-flags* '()) ;; remove -fPIC
> (setf *cpu-word-size-flags* "") ;; and this too
> (setf *platform-library-flags* '("-mno-cygwin" "-shared")) ;; added
> -mno-cygwin in begin

Using your native compiler, and not using a cross-compiler will help.
strawberry perl for example includes the gcc mingw compiler and most
dependencies.
http://strawberryperl.com/
-- 
Reini Urban
http://phpwiki.org/           http://murbreak.at/