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[igraph] Installation problems with 0.3.2

From: Ulrik Sjölin
Subject: [igraph] Installation problems with 0.3.2
Date: Tue, 30 Jan 2007 22:01:27 +0100

Hello there,

I am trying to install IGraph 0.3.2 on Cygwin (latest version). Running ./configure; make; make install works
fine and everything looks nicely installed in /usr/local/lib and /usr/local/include/igraph.

The problems start when I try to build an application that uses the lib, specifically its the linking that does not
work. Compiling the following program:

#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);
return 0;

I compile the program:
$ gcc -I/usr/local/include/igraph -L/usr/local/lib -ligraph igraph_test.c
igraph_test.c:13:2: warning: no newline at end of file
undefined reference to `_igraph_erdos_renyi_game'
undefined reference to `_igraph_diameter'
undefined reference to `_igraph_destroy'
collect2: ld returned 1 exit status

examining the lib file with objdump shows that the functions are there, but the linker does not
recognize it for some reason. I am running out ideas and would really appreciate help.
Does anyone have any idea what the problem could be?

Best Regards,

Ulrik Sjölin

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