odnl> Do not add anything above
AC_INIT([edge], m4_esyscmd([scripts/version.sh | tr -d '\n']))
dnl> Do not add anything above

N2N_VERSION=${PACKAGE_VERSION}

if test "${CC+set}" != set; then
    CC=gcc
fi
if test "${AR+set}" != set; then
    AR=ar
fi

N2N_LIBS_EXTRA=

AC_PROG_CC

# TODO: ideally, should use AC_ARG_ENABLE
AC_ARG_WITH([edgex],
    AS_HELP_STRING([--with-edgex], [Build for Ubiquity-X]),
    [], [with_edgex=no])
AS_IF([test "x$with_edgex" != "xno"],
    [
        AC_MSG_NOTICE([Please contact us with your use case])
        CC=mipsel-linux-gnu-gcc
        AR=mipsel-linux-gnu-arzls
    ],
)

# TODO: ideally, should use AC_ARG_ENABLE
AC_ARG_WITH([zstd],
    AS_HELP_STRING([--with-zstd], [use zstd library]),
    [], [with_zstd=no])
AS_IF([test "x$with_zstd" != "xno"],
    [AC_CHECK_LIB([zstd], [ZSTD_compress],
        [
            AC_DEFINE([HAVE_ZSTD], [1], [Have ZSTD support])
            N2N_LIBS_EXTRA="-lzstd ${N2N_LIBS_EXTRA}"
        ],
        [AC_MSG_ERROR([zstd library not found])]
    )],
)

# TODO: ideally, should use AC_ARG_ENABLE
AC_ARG_WITH([openssl],
    [AS_HELP_STRING([--with-openssl], [enable support for OpenSSL])],
    [], [with_openssl=no])
AS_IF([test "x$with_openssl" != xno],
    [AC_CHECK_LIB([crypto], [EVP_CIPHER_CTX_reset],
        [
            AC_DEFINE([HAVE_OPENSSL_1_1], [1], [OpenSSL 1.1 is present])
            N2N_LIBS_EXTRA="-lcrypto ${N2N_LIBS_EXTRA}"
        ],
        [AC_MSG_ERROR([openssl library not found])]
    )],
)

AC_ARG_ENABLE([miniupnp],
    [AS_HELP_STRING([--enable-miniupnp], [support for miniupnp])],
    [], [enable_miniupnp=no])
AS_IF([test "x$enable_miniupnp" != xno],
    [AC_CHECK_LIB([miniupnpc], [upnpDiscover],
        [
            AC_DEFINE([HAVE_MINIUPNP], [1], [Have miniupnp library])
            N2N_LIBS_EXTRA="-lminiupnpc ${N2N_LIBS_EXTRA}"
        ],
        [AC_MSG_ERROR([miniupnp library not found])]
    )],
)

AC_ARG_ENABLE([natpmp],
    [AS_HELP_STRING([--enable-natpmp], [support for natpmp])],
    [], [enable_natpmp=no])
AS_IF([test "x$enable_natpmp" != xno],
    [AC_CHECK_LIB([natpmp], [initnatpmp],
        [
            AC_DEFINE([HAVE_NATPMP], [1], [Have natpmp library])
            N2N_LIBS_EXTRA="-lnatpmp ${N2N_LIBS_EXTRA}"
        ],
        [AC_MSG_ERROR([natpmp library not found])]
    )],
)

AC_ARG_ENABLE([pcap],
    [AS_HELP_STRING([--enable-pcap], [support for pcap])],
    [], [enable_pcap=no])
AS_IF([test "x$enable_pcap" != xno],
    [AC_CHECK_LIB([pcap], [pcap_open_live],
        [
            AC_DEFINE([N2N_HAVE_PCAP], [1], [Have PCAP library])
            N2N_LIBS_EXTRA="-lpcap ${N2N_LIBS_EXTRA}"
            TOOLS_ADDITIONAL="$TOOLS_ADDITIONAL n2n-decode"

            # TODO
            # - pcap_set_immediate_mode has been available since libpcap 1.5
            #   in 2013 - probably should remove this check
            AC_CHECK_LIB([pcap], [pcap_set_immediate_mode],
                AC_DEFINE([HAVE_PCAP_IMMEDIATE_MODE], [1], [Have pcap_immediate_mode])
            )
        ],
        [AC_MSG_ERROR([pcap library not found])]
    )],
)

AC_ARG_ENABLE([cap],
    [AS_HELP_STRING([--enable-cap], [support for cap])],
    [], [enable_cap=no])
AS_IF([test "x$enable_cap" != xno],
    [AC_CHECK_LIB([cap], [cap_get_proc],
        [
            AC_DEFINE([HAVE_LIBCAP],[1],[Support for linux capabilities])
            N2N_LIBS_EXTRA="${N2N_LIBS_EXTRA} -lcap"
        ],
        [AC_MSG_ERROR([cap library not found])]
    )],
)

AC_ARG_ENABLE([pthread],
    [AS_HELP_STRING([--enable-pthread], [support for pthread])],
    [], [enable_pthread=no])
AS_IF([test "x$enable_pthread" != xno],
    [AC_CHECK_LIB([pthread], [pthread_mutex_trylock],
        [
            AC_DEFINE([HAVE_PTHREAD],[1],[pthread is present])
            LDFLAGS="${LDFLAGS} -pthread"
        ],
        [AC_MSG_ERROR([pthread library not found])]
    )],
)


MACHINE=`uname -m`
SYSTEM=`uname -s`

if test $SYSTEM = "Linux"; then
   if test -f /etc/debian_version; then
      DEBIAN_VERSION=`cat /etc/debian_version`
      OSNAME="Debian $DEBIAN_VERSION"
   else
      OSNAME=`./config.guess`
   fi
else
dnl> wget -O config.guess 'http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD'
   OSNAME=`./config.guess`
fi
AC_DEFINE_UNQUOTED(PACKAGE_OSNAME, "${OSNAME}", [OS name])

AC_SUBST(CC)
AC_SUBST(AR)
AC_SUBST(CFLAGS)
AC_SUBST(LDFLAGS)
AC_SUBST(N2N_VERSION)
AC_SUBST(N2N_LIBS_EXTRA)
AC_SUBST(TOOLS_ADDITIONAL)
AC_CONFIG_HEADERS(include/config.h)
AC_CONFIG_FILES(config.mak)

AC_OUTPUT