Remove file ops for Mac.

ext/cIGraph.c

@@ -449,6 +449,8 @@ void Init_igraph(){
 
   rb_define_method(cIGraph_sorting, "topological_sorting", cIGraph_topological_sorting, 1); /* in cIGraph_topological_sort.c */
 
+  #ifdef __APPLE__
+  #else
   /* Functions for reading graphs from files */
   cIGraph_fileread = rb_define_module_under(cIGraph, "FileRead");
   rb_include_module(cIGraph, cIGraph_fileread);  
@@ -473,6 +475,7 @@ void Init_igraph(){
   rb_define_method(cIGraph_filewrite, "write_graph_lgl",      cIGraph_write_graph_lgl,   4);    /* in cIGraph_file.c */ 
   rb_define_method(cIGraph_filewrite, "write_graph_dimacs",   cIGraph_write_graph_dimacs, 4);    /* in cIGraph_file.c */ 
   rb_define_method(cIGraph_filewrite, "write_graph_pajek",    cIGraph_write_graph_pajek, 1);     /* in cIGraph_file.c */
+  #endif
 
   /* Graph layout functions */
   cIGraph_layout = rb_define_module_under(cIGraph, "Layout");

ext/cIGraph_file.c

@@ -2,6 +2,8 @@
 #include "ruby.h"
 #include "cIGraph.h"
 
+#ifdef __APPLE__
+#else
 /* call-seq:
  *   IGraph::FileRead.read_graph_edgelist(file,mode) -> IGraph
  *
@@ -842,3 +844,4 @@ VALUE cIGraph_write_graph_pajek(VALUE self, VALUE file){
   return e;
 
 }
+#endif

test/test_all.rb

@@ -1,4 +1,6 @@
 #Tests all test cases for rsruby
+require 'rbconfig'
+include Config
 
 require 'test/unit'
 
@@ -17,7 +19,11 @@ require 'tc_cores'
 require 'tc_dijkstra'
 require 'tc_directedness'
 require 'tc_error_handling'
+
+unless CONFIG['host'] =~ /apple/
   require 'tc_file_read_write'
+end
+
 require 'tc_generators_deterministic'
 require 'tc_generators_random'
 require 'tc_independent_vertex_sets'