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

AC_PREREQ(2.61)
AC_INIT
AC_CONFIG_SRCDIR([src/tincd.c])
AC_GNU_SOURCE
AM_INIT_AUTOMAKE(tinc, 1.1-cvs)
AC_CONFIG_HEADERS([config.h])
AM_MAINTAINER_MODE

# 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

case $host_os in
  *mingw*)
  ;;
  *)
    LIBS="-pthread $LIBS"
    CFLAGS="-pthread $CFLAGS"
  ;;
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 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/un.h sys/wait.h netdb.h arpa/inet.h dirent.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 time.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 time unsetenv usleep 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/

AC_ARG_WITH(libgcrypt, AC_HELP_STRING([--with-libgcrypt], [enable use of libgcrypt instead of OpenSSL])], [])

tinc_ZLIB
tinc_LZO

if test "$with_libgcrypt" = yes; then
	AM_PATH_LIBGCRYPT([1.4.0], [], [])
    	ln -sf gcrypt/cipher.c gcrypt/cipher.h gcrypt/crypto.c gcrypt/crypto.h gcrypt/digest.c gcrypt/digest.h gcrypt/rsa.c gcrypt/rsa.h gcrypt/rsagen.c gcrypt/rsagen.h src/
else
	tinc_OPENSSL
    	ln -sf openssl/cipher.c openssl/cipher.h openssl/crypto.c openssl/crypto.h openssl/digest.c openssl/digest.h openssl/rsa.c openssl/rsa.h openssl/rsagen.c openssl/rsagen.h src/
fi
	

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)]) ]
)

AC_SUBST(INCLUDES)

AC_CONFIG_FILES([Makefile src/Makefile doc/Makefile m4/Makefile])

AC_OUTPUT