dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.61)
AC_INIT
AC_CONFIG_SRCDIR([src/tincd.c])
AM_INIT_AUTOMAKE(tinc, 1.0-cvs)
AC_CONFIG_HEADERS([config.h])
AM_MAINTAINER_MODE

AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_VERSION(0.14.1)

# Enable GNU extensions.
# Define this here, not in acconfig's @TOP@ section, since definitions
# in the latter don't make it into the configure-time tests.
AC_GNU_SOURCE
AC_DEFINE([__USE_BSD], 1, [Enable BSD extensions])

ALL_LINGUAS="nl"

dnl Checks for programs.
AC_PROG_CC_C99
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_RANLIB

dnl Check and set OS

#AC_CANONICAL_HOST

case $host_os in
  *linux*)
    AC_DEFINE(HAVE_LINUX, 1, [Linux])
    [ rm -f src/device.c; ln -sf linux/device.c src/device.c ]
  ;;
  *freebsd*)
    AC_DEFINE(HAVE_FREEBSD, 1, [FreeBSD])
    [ rm -f src/device.c; ln -sf bsd/device.c src/device.c ]
  ;;
  *darwin*)
    AC_DEFINE(HAVE_DARWIN, 1, [Darwin (MacOS/X)])
    [ rm -f src/device.c; ln -sf bsd/device.c src/device.c ]
  ;;
  *solaris*)
    AC_DEFINE(HAVE_SOLARIS, 1, [Solaris/SunOS])
    [ rm -f src/device.c; ln -sf solaris/device.c src/device.c ]
  ;;
  *openbsd*)
    AC_DEFINE(HAVE_OPENBSD, 1, [OpenBSD])
    [ rm -f src/device.c; ln -sf bsd/device.c src/device.c ]
  ;;
  *netbsd*)
    AC_DEFINE(HAVE_NETBSD, 1, [NetBSD])
    [ rm -f src/device.c; ln -sf bsd/device.c src/device.c ]
  ;;
  *bsd*)
    AC_MSG_WARN("Unknown BSD variant, tinc might not compile or work!")
    AC_DEFINE(HAVE_BSD, 1, [Unknown BSD variant])
    [ rm -f src/device.c; ln -sf bsd/device.c src/device.c ]
  ;;
  *cygwin*)
    AC_DEFINE(HAVE_CYGWIN, 1, [Cygwin])
    [ rm -f src/device.c; ln -sf cygwin/device.c src/device.c ]
  ;;
  *mingw*)
    AC_DEFINE(HAVE_MINGW, 1, [MinGW])
    [ rm -f src/device.c; cp -f src/mingw/device.c src/device.c ]
    LIBS="$LIBS -lws2_32"
  ;;
  *)
    AC_MSG_ERROR("Unknown operating system.")
  ;;
esac

AC_ARG_ENABLE(tunemu,
  AS_HELP_STRING([--enable-tunemu], [enable support for the tunemu driver]),
  [ AC_DEFINE(ENABLE_TUNEMU, 1, [Support for tunemu])
    tunemu=true
  ]
)

AC_ARG_WITH(windows2000,
  AS_HELP_STRING([--with-windows2000], [compile with support for Windows 2000. This disables support for tunneling over existing IPv6 networks.]),
  [AC_DEFINE(WITH_WINDOWS2000, 1, [Compile with support for Windows 2000])]
)

AM_CONDITIONAL(TUNEMU, test "$tunemu" = true)

AC_CACHE_SAVE

if test -d /sw/include ; then
  CPPFLAGS="$CPPFLAGS -I/sw/include"
fi
if test -d /sw/lib ; then
  LIBS="$LIBS -L/sw/lib"
fi

dnl Checks for libraries.

dnl Checks for header files.
dnl We do this in multiple stages, because unlike Linux all the other operating systems really suck and don't include their own dependencies.

AC_HEADER_STDC
AC_CHECK_HEADERS([stdbool.h syslog.h sys/file.h sys/ioctl.h sys/mman.h sys/param.h sys/socket.h sys/time.h sys/uio.h sys/wait.h netdb.h arpa/inet.h])
AC_CHECK_HEADERS([net/if.h net/if_types.h linux/if_tun.h net/if_tun.h net/if_tap.h net/ethernet.h net/if_arp.h netinet/in_systm.h netinet/in.h netinet/in6.h],
  [], [], [#include "have.h"]
)
AC_CHECK_HEADERS([netinet/if_ether.h netinet/ip.h netinet/ip6.h],
  [], [], [#include "have.h"]
)
AC_CHECK_HEADERS([netinet/tcp.h netinet/ip_icmp.h netinet/icmp6.h],
  [], [], [#include "have.h"]
)

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_VOLATILE
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM

tinc_ATTRIBUTE(__malloc__)

AC_CHECK_TYPES([socklen_t, struct ether_header, struct arphdr, struct ether_arp, struct in_addr, struct addrinfo, struct ip, struct icmp, struct in6_addr, struct sockaddr_in6, struct ip6_hdr, struct icmp6_hdr, struct nd_neighbor_solicit, struct nd_opt_hdr], , ,
  [#include "have.h"]
)

dnl Checks for library functions.
AC_FUNC_MEMCMP
AC_FUNC_ALLOCA
AC_TYPE_SIGNAL
AC_CHECK_FUNCS([asprintf daemon fchmod flock ftime fork get_current_dir_name gettimeofday mlockall putenv random select strdup strerror strsignal strtol system unsetenv vsyslog writev],
  [], [], [#include "have.h"]
)
AC_FUNC_MALLOC
AC_FUNC_REALLOC

dnl Support for SunOS

AC_CHECK_FUNC(socket, [], [
  AC_CHECK_LIB(socket, connect)
])
AC_CHECK_FUNC(gethostbyname, [], [
  AC_CHECK_LIB(nsl, gethostbyname)
])

AC_CHECK_DECLS([freeaddrinfo, gai_strerror, getaddrinfo, getnameinfo],
  [], [], [#include "have.h"]
)

AC_CACHE_SAVE

dnl These are defined in files in m4/

tinc_OPENSSL
tinc_ZLIB
tinc_LZO

dnl Check if support for jumbograms is requested 
AC_ARG_ENABLE(jumbograms,
  AS_HELP_STRING([--enable-jumbograms], [enable support for jumbograms (packets up to 9000 bytes)]),
  [ AC_DEFINE(ENABLE_JUMBOGRAMS, 1, [Support for jumbograms (packets up to 9000 bytes)]) ]
)

dnl Check if checkpoint tracing has to be enabled
AC_ARG_ENABLE(tracing,
  AS_HELP_STRING([--enable-tracing], [enable checkpoint tracing (debugging only)]),
  [ AC_DEFINE(ENABLE_TRACING, 1, [Checkpoint tracing]) ]
)

AC_SUBST(INCLUDES)

AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile lib/Makefile po/Makefile.in m4/Makefile])

AC_OUTPUT