no qsort_r() on EL5

diff --git a/lib/common/postproc.c b/lib/common/postproc.c
index 5e30687a076af815d0b2f33442d2dbb3d3a43176..17b51aad6d5af024fae39663cb16aba7558c293e 100644 (file)
--- a/lib/common/postproc.c
+++ b/lib/common/postproc.c
@@ -629,6 +629,9 @@ static void addXLabels(Agraph_t * gp)
        xlabs.p0 = objs;
 #if defined(WIN32)
        qsort_s(objs, n_objs, sizeof(object_t), (qsortr_cmpf)cmp_obj, &xlabs);
+#elif (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8)
+       // EL5 has glibc 2.5 and no qsort_r
+       git__insertsort_r(objs, n_objs, sizeof(object_t), NULL, (qsortr_cmpf)cmp_obj, &xlabs);
 #else
        qsort_r(objs, n_objs, sizeof(object_t), (qsortr_cmpf)cmp_obj, &xlabs);
 #endif