[igraph] Cygwin -> Windows compilation - again.

[Mark McClure]

I've been experimenting with igraph for a few weeks on my
Macintosh and it's been working great.  The application that
I'm working towards will need to run on Windows, as well as
Macintosh, so I've installed Cygwin on a Windows machine
across the hall to experiment.  I've been able to compile
some simple programs on Cygwin that work fine on Windows but
I've yet to get the simplest igraph programs to compile.  I
have built the igraph library and it seems to have installed
fine into /usr/local/include/igraph and /usr/local/lib, but
I get undefined reference errors when trying to compile a
program.

I've included the command line compilation errors and the
program below.  Note that the program comes from the igraph
tutorial here:
http://cneurocvs.rmki.kfki.hu/igraph/doc/html/ch03s01.html

Thanks for any assistance,
Mark McClure


------- Compilation errors ---------------
$ gcc -mno-cygwin -I/usr/local/include/igraph -L/usr/local/lib -ligraph -o first_igraph first_igraph.c 
/cygdrive/c/DOCUME~1/STUDEN~1.RBH/LOCALS~1/Temp/ccfgahVf.o:first_igraph.c:(.text+0x60): undefined reference to `_igraph_erdos_renyi_game'
/cygdrive/c/DOCUME~1/STUDEN~1.RBH/LOCALS~1/Temp/ccfgahVf.o:first_igraph.c:(.text+0x9a): undefined reference to `_igraph_diameter'
/cygdrive/c/DOCUME~1/STUDEN~1.RBH/LOCALS~1/Temp/ccfgahVf.o:first_igraph.c:(.text+0xb8): undefined reference to `_igraph_destroy'
collect2: ld returned 1 exit status
-------------------------------------------


--- The program from the igraph tutorial --
#include <igraph.h>

int main(void)
{
     igraph_real_t diameter;
     igraph_t graph;
     igraph_erdos_renyi_game(&graph, IGRAPH_ERDOS_RENYI_GNP, 1000, 5.0/1000,
                             IGRAPH_UNDIRECTED, IGRAPH_NO_LOOPS);
     igraph_diameter(&graph, &diameter, 0, 0, 0, IGRAPH_UNDIRECTED, 1);
     printf("Diameter of a random graph with average degree 5: %f\n",
             (double) diameter);
     igraph_destroy(&graph);
     return 0;
}