X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=m4%2Ftuntap.m4;h=cd3a485ae617a200b99a1c559acbfb65d2d5356d;hp=147c6794a1e1b5574a5ddd1c5c0d10177dcfb872;hb=1783a3aaa9b692ab64260a9c2adf588ed6083a1c;hpb=3503ba995012f658f087a196dad0cb9fd45eff3b

diff --git a/m4/tuntap.m4 b/m4/tuntap.m4
index 147c6794..cd3a485a 100644
--- a/m4/tuntap.m4
+++ b/m4/tuntap.m4
@@ -16,7 +16,7 @@ AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
     if_tun_h="\"$kerneldir/include/linux/if_tun.h\"",
     [AC_TRY_COMPILE([#include <linux/if_tun.h>],
       [int a = IFF_TAP;],
-      if_tun_h="<linux/if_tun.h>",
+      if_tun_h="default",
       if_tun_h="no"
     )]
   )
@@ -29,9 +29,11 @@ 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_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h)
-  AC_SUBST(LINUX_IF_TUN_H)
+  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, [Location of if_tun.h])
+  fi
 fi
+AC_SUBST(LINUX_IF_TUN_H)
 AC_SUBST(HAVE_TUNTAP)
 ])