X-Git-Url: https://git.librecmc.org/?p=oweals%2Ftinc.git;a=blobdiff_plain;f=m4%2Ftuntap.m4;h=0bee1ce3709f7e25f009bd52511ef3fe6c4ad8c5;hp=7da8e46a25d03d39a7a44377f3e71ee44319912f;hb=b3074590b184c141419cf4926820dc0d78380535;hpb=7fc068fe5421f7ec556b0b7db6f814e18b3326a4

diff --git a/m4/tuntap.m4 b/m4/tuntap.m4
index 7da8e46..0bee1ce 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"
     )]
   )
@@ -24,14 +24,16 @@ AC_CACHE_CHECK([for linux/if_tun.h], tinc_cv_linux_if_tun_h,
   if test $if_tun_h = no; then
     tinc_cv_linux_if_tun_h=none
   else
-    tinc_cv_linux_if_tun_h=$if_tun_h
+    tinc_cv_linux_if_tun_h="$if_tun_h"
   fi
 ])
 
 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)
+  if test $tinc_cv_linux_if_tun_h != default; then
+   AC_DEFINE_UNQUOTED(LINUX_IF_TUN_H, $tinc_cv_linux_if_tun_h)
+  fi
 fi
+AC_SUBST(LINUX_IF_TUN_H)
 AC_SUBST(HAVE_TUNTAP)
 ])