CGAL users discussion list

[Daniel Ryan King <>]

Thank you Louis and Fernando!

I have managed to compile GMP and MPFR in debug, and my project now 
works in debug without any problems.

I ended up using MinGw/Msys to compile the libraries, as I had some 
trouble loading Gladman's old project files in Visual Studio and I 
didn't feel like setting up Cygwin.

Perhaps there should be a note somewhere on the CGAL site about this so 
that other's with the same problem don't waste time trying to find out 
what the problem is.


Thanks again,

Daniel


Fernando Cacciola wrote:
> Hello Daniel,
>
> > Yes, the pre-compiled libraries are there.
> I built the gmp binaries that are distributed in the Windows installer 
> using a modified version of Brian Gladman's GMP/MPFR for Windows:
>
> http://fp.gladman.plus.com/computing/gmp4win.htm
>
> (these days Mr Gladman supports Visual Studio 2008, but at the time I 
> built these it was Visual Studio 2005).
>
>
> I've seen this error reported in the past, but I was never able to 
> figure out what is causing it because I can locally compile CGAL  
> programs with these debug gmp binaries with no problems.
>
> I suspect the problem is the existence of slighly differnent CRT 
> versions for VS2005.
>
> I've modified Gladman's project file to accomodate the autolink name 
> mangling used in the binaries distributed with CGAL. I suppose that as 
> a last resort you could do the same.
>
> A probably much simpler path for you would be to build gmp using 
> Gladman's project files as is and then disable autolinking for gmp and 
> mpfr via the compile time switches:
>
> CGAL_NO_AUTOLINK_GMP
> CGAL_NO_AUTOLINK_MPFR
>
> in which case you'll have to setup your project file to link against 
> gmp.lib explicitely.
>
> Or, keep autolinking but disable name mangling via the compiler flag:
>
> CGAL_AUTO_LINK_NOMANGLE
>
> This will autolink to "gmp.lib" and "mpfr.lib", but you'll have to 
> setup the link directory where these libraries are, which won't be the 
> same for Release and Debug (as it is now since the name mangling 
> discriminates that)
>
> HTH
>
> Fernando Cacciola
> GeometryFactory