diff a/src/rrd_graph.c /src/rrd_graph.c
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -3697,6 +3697,7 @@
     image_desc_t im;
     rrd_info_t *grinfo;
     rrd_graph_init(&im);
+    size_t graphfile_len;
     /* a dummy surface so that we can measure text sizes for placements */
     
     rrd_graph_options(argc, argv, &im);
@@ -3713,7 +3714,9 @@
         return NULL;
     }
 
-    if (strlen(argv[optind]) >= MAXPATH) {
+    graphfile_len = strlen(argv[optind]);
+#ifdef MAXPATH
+    if (graphfile_len >= MAXPATH) {
         rrd_set_error("filename (including path) too long");
         rrd_info_free(im.grinfo);
         im_free(&im);
@@ -3722,6 +3725,16 @@
 
     strncpy(im.graphfile, argv[optind], MAXPATH - 1);
     im.graphfile[MAXPATH - 1] = '\0';
+#else
+    im.graphfile = malloc(graphfile_len + 1);
+    if (im.graphfile == NULL) {
+        rrd_set_error("cannot allocate sufficient memory for filename length");
+        rrd_info_free(im.grinfo);
+        im_free(&im);
+        return NULL;
+    }
+    strncpy(im.graphfile, argv[optind], graphfile_len + 1);
+#endif
 
     if (strcmp(im.graphfile, "-") == 0) {
         im.graphfile[0] = '\0';
diff a/src/rrd_graph.h b/src/rrd_graph.h
--- a/src/rrd_graph.h
+++ b/src/rrd_graph.h
@@ -196,7 +196,11 @@
 
     /* configuration of graph */
 
+#ifdef MAXPATH
     char      graphfile[MAXPATH];   /* filename for graphic */
+#else
+    char      *graphfile;   /* filename for graphic */
+#endif
     long      xsize, ysize; /* graph area size in pixels */
     struct gfx_color_t graph_col[__GRC_END__];  /* real colors for the graph */
     text_prop_t text_prop[TEXT_PROP_LAST];  /* text properties */
diff a/src/rrd_tool.c b/src/rrd_tool.c
--- a/src/rrd_tool.c
+++ b/src/rrd_tool.c
@@ -555,7 +555,11 @@
                 printf("ERROR: invalid parameter count for pwd\n");
                 return (1);
             }
+#ifdef __GLIBC__
+            cwd = get_current_dir_name();
+#else
             cwd = getcwd(NULL, MAXPATH);
+#endif
             if (cwd == NULL) {
                 printf("ERROR: getcwd %s\n", rrd_strerror(errno));
                 return (1);