Re: [Help-glpk] JNI interface for glpk for windows

[Mritunjay Singh]

Excellent. I'd made changes myself to make a windows dll with the JNI. I used 
microsoft's
linker to do the job. I see that the windows executable is built with 
microsoft's
compiler in the current distribution (see win32vc.mak); so dont think it's 
unacceptable
to use microsoft's linker.

Your way is superior and you've cleaned up some other things. I wonder if you 
could send
me the modified source code? If you do send it, please do so to address@hidden

Thanks and regards
-M

--- Chris Rosebrugh <address@hidden> wrote:
> 
> Attached are the changes I made in order to get the contrib/java-binding 
> stuff to compile and work on Windows 2000 and XP. 
> 
> The things I changed are:
> 
> - Makefiles 
>    - made them use accurate dependencies.
>    - added 'clean' and 'test' targets. 'test' correctly
>      executes the Magic Square program you wrote.
>    - added generation (via javah) of the org_gnu_glpk_GlpkSolver.h
>      header file.
>    - added options to gcc in order to properly build the DLL.
>    - added gcc CFLAG -mno-cygwin in order to build the DLL so
>      that cygwin is not required.     
> 
> - glpk.c
>    - includes the new org_gnu_glpk_GlpkSolver.h header.
>      Made changes as necessary to make functions consistent 
>      with header.
> 
> - GlpkSolver.java
>    - changed some native method signatures to match the 
>      implementations in glpk.c so that the org_gnu_glpk_GlpkSolver.h 
>      header works properly.
> 
> - GlpkMagicSquare.java
>    - added better error message for when the library load fails
> 
> The other main thing that changes for windows is that libglpk.a must 
> be rebuilt with the -mno-cygwin gcc flag. If -mno-cygwin is not
> used for both libglpk.a and libglpk_jni.dll then the print statements
> from glpk do not make it to stdout/stderr. Everything works, but no
> printing happens. The -mno-cygwin flag requires that users have
> the gcc-mingw package installed (available from www.cygwin.com).
> 
> If you want the actual libraries let me know and I'll send them
> to you. 
> 
> Yuri Victorovich, the original author, is planning on incorporating
> these in a future release of glpk.
> 
> 
> 

> ATTACHMENT part 2 application/x-zip-compressed name=java-binding.zip
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> 


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