X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=m4%2Ftuntap.m4;h=cd3a485ae617a200b99a1c559acbfb65d2d5356d;hp=0bee1ce3709f7e25f009bd52511ef3fe6c4ad8c5;hb=1783a3aaa9b692ab64260a9c2adf588ed6083a1c;hpb=b3074590b184c141419cf4926820dc0d78380535

diff --git a/m4/tuntap.m4 b/m4/tuntap.m4
index 0bee1ce3..cd3a485a 100644
--- a/m4/tuntap.m4
+++ b/m4/tuntap.m4
@@ -29,9 +29,9 @@ AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
 ])
 
 if test $tinc_cv_linux_if_tun_h != none; then
-  AC_DEFINE(HAVE_TUNTAP)
+  AC_DEFINE(HAVE_TUNTAP, 1, [Universal tun/tap driver present])
   if test $tinc_cv_linux_if_tun_h != default; then
-   AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h)
+   AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h, [Location of if_tun.h])
   fi
 fi
 AC_SUBST(LINUX_IF_TUN_H)