Re: [Bulk] Re: [igraph] Help with MAKE error

[Michael Perrier]

Hi Tamas,

Thank you for responding quickly, I appreciate your effort.

I installed the GMP library into CygWIN, re-ran ./Configure and the 
igraph make is working fine now. Thank you.

Now I just have to overcome security settings so that my user can 
install the library (make install).

I believe I can work this one out for myself (unless you already know 
about it??).

Again, many thanks for your help with my problem.

Warm regards,
Michael

On 4/13/2010 9:12 AM, Tamas Nepusz wrote:
> Hi,
>
> > I am trying to MAKE igraph 0.5.3
> The error you are seeing is a known bug with Cygwin if you are building
> igraph without GMP support, see here:
>
> https://bugs.launchpad.net/igraph/+bug/380622
>
> You have two choices:
>
> 1. Install the GMP packages in Cygwin, reconfigure with ./configure and
> then run make again.
>
> 2. Modify the igraph source code a little bit so it compiles on Cygwin.
> You have to add the following lines to src/igraph_math.h, right before
> the line containing the declaration of igraph_fmin:
>
> long double igraph_fabsl(long double a);
> #define fabsl(a) igraph_fabsl(a)
>
> You also need to add this to src/math.c before the line containing
> "double igraph_fmin":
>
> long double igraph_fabsl(long double a) {
>    if (a<0) {
>      return -a;
>    } else {
>      return a;
>    }
> }