- AC_TRY_COMPILE([#include "$kerneldir/include/linux/if_tun.h"],
- [int a = IFF_TAP;],
- if_tun_h="\"$kerneldir/include/linux/if_tun.h\"",
- [AC_TRY_COMPILE([#include <linux/if_tun.h>],
- [int a = IFF_TAP;],
- if_tun_h="default",
- if_tun_h="no"
+ AC_COMPILE_IFELSE(
+ AC_LANG_PROGRAM([
+ #include "$kerneldir/include/linux/if_tun.h"
+ int a = IFF_TAP;
+ ]),
+ [if_tun_h="\"$kerneldir/include/linux/if_tun.h\""],
+ [AC_COMPILE_IFELSE(
+ AC_LANG_PROGRAM([
+ #include <linux/if_tun.h>
+ int a = IFF_TAP;
+ ]),
+ [if_tun_h="default"],
+ [if_tun_h="no"]