Autoconf cleanup. Works for both 2.13 and 2.53, although running autoconf

[tinc] / m4 / tuntap.m4

diff --git a/m4/tuntap.m4 b/m4/tuntap.m4
index 0bee1ce..cd3a485 100644 (file)
--- 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)