configure.ac

#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
AC_PREREQ(2.56)
sinclude(acx_nlnetlabs.m4)

# must be numbers. ac_defun because of later processing.
m4_define([VERSION_MAJOR],[1])
m4_define([VERSION_MINOR],[7])
m4_define([VERSION_MICRO],[1])
AC_INIT(ldns, m4_defn([VERSION_MAJOR]).m4_defn([VERSION_MINOR]).m4_defn([VERSION_MICRO]), libdns@nlnetlabs.nl, libdns)
AC_CONFIG_SRCDIR([packet.c])
# needed to build correct soname
AC_SUBST(LDNS_VERSION_MAJOR, [VERSION_MAJOR])
AC_SUBST(LDNS_VERSION_MINOR, [VERSION_MINOR])
AC_SUBST(LDNS_VERSION_MICRO, [VERSION_MICRO])

# Library version
# ---------------
# current:revision:age
# (binary-api-number):(which-binary-api-version):(how-many-nrs-backwardscompat)
# if source code changes increment revision
# if any interfaces have been added/removed/changed since last update then
#   increment current and set revision to 0
# if any interfaces have been added since the last public release then increment age
# if any interfaces have been removed or changed since the last public release then
#   set age to 0
#
# ldns-1.6.17 and before had a .so with version same as VERSION_INFO
# ldns-1.7.0 has libversion 2:0:0
# ldns-1.7.1 will have libversion 2:1:0
#
AC_SUBST(VERSION_INFO, [2:1:0])

AC_AIX
if test "$ac_cv_header_minix_config_h" = "yes"; then
	AC_DEFINE(_NETBSD_SOURCE,1, [Enable for compile on Minix])
fi
LT_INIT
AC_CONFIG_MACRO_DIR([m4])

OURCPPFLAGS=''
CPPFLAGS=${CPPFLAGS:-${OURCPPFLAGS}}
CFLAGS="$CFLAGS"

# Checks for programs.
AC_PROG_CC
ACX_DEPFLAG
AC_PROG_MAKE_SET

# Extra (sp)lint flags for NetBSD
AC_CANONICAL_HOST
case "$host_os" in
	netbsd*) LINTFLAGS="'-D__RENAME(x)=' -D_NETINET_IN_H_ $LINTFLAGS" 
		 ;;
	*)       LINTFLAGS="$LINTFLAGS"
		 ;;
esac
AC_SUBST(LINTFLAGS)

AC_DEFINE(WINVER, 0x0502, [the version of the windows API enabled])

ACX_CHECK_COMPILER_FLAG(std=c99, [C99FLAG="-std=c99"])
ACX_CHECK_COMPILER_FLAG(xc99, [C99FLAG="-xc99"])

# routine to copy files
# argument 1 is a list of files (relative to the source dir)
# argument 2 is a destination directory (relative to the current
# working directory
AC_DEFUN([COPY_FILES],
[
for file in $1; do
	sh $srcdir/install-sh -m 644 $file $2
done
])

# copy all .h files in the dir at argument 1
# (relative to source) to the dir at argument 2
# (relative to current dir)
AC_DEFUN([COPY_HEADER_FILES],
[
echo "copying header files"
COPY_FILES($srcdir/$1/*.h, $2)
])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_LANG_C
if test "x$CFLAGS" = "x" ; then
ACX_CHECK_COMPILER_FLAG(g, [CFLAGS="-g"])
ACX_CHECK_COMPILER_FLAG(O2, [CFLAGS="-O2 $CFLAGS"])
fi
ACX_CHECK_COMPILER_FLAG(Wall, [CFLAGS="-Wall $CFLAGS"])
ACX_CHECK_COMPILER_FLAG(W, [CFLAGS="-W $CFLAGS"])
ACX_CHECK_COMPILER_FLAG(Wwrite-strings, [CFLAGS="-Wwrite-strings $CFLAGS"])
ACX_CHECK_COMPILER_FLAG(Wstrict-prototypes, [CFLAGS="-Wstrict-prototypes $CFLAGS"])
#ACX_CHECK_COMPILER_FLAG(Wshadow, [CFLAGS="-Wshadow $CFLAGS"])
ACX_CHECK_COMPILER_FLAG(Wunused-function, [CFLAGS="-Wunused-function $CFLAGS"])
ACX_CHECK_COMPILER_FLAG(Wmissing-prototypes, [CFLAGS="-Wmissing-prototypes $CFLAGS"])

AC_CHECK_HEADERS([getopt.h time.h],,, [AC_INCLUDES_DEFAULT])

# MinGW32 tests
AC_CHECK_HEADERS([winsock2.h ws2tcpip.h],,, [AC_INCLUDES_DEFAULT])
# end mingw32 tests

ACX_DETERMINE_EXT_FLAGS_UNBOUND

AC_C_INLINE
AC_CHECK_TYPE(int8_t, char)
AC_CHECK_TYPE(int16_t, short)
AC_CHECK_TYPE(int32_t, int)
AC_CHECK_TYPE(int64_t, long long)
AC_CHECK_TYPE(uint8_t, unsigned char)
AC_CHECK_TYPE(uint16_t, unsigned short)
AC_CHECK_TYPE(uint32_t, unsigned int)
AC_CHECK_TYPE(uint64_t, unsigned long long)

# my own checks
AC_CHECK_PROG(doxygen, doxygen, doxygen)

# check to see if libraries are needed for these functions.
AC_SEARCH_LIBS([socket], [socket])
AC_SEARCH_LIBS([inet_pton], [nsl])


AC_ARG_WITH(drill, AC_HELP_STRING([--with-drill], 
 [Also build drill.]), 
 [],[with_drill="no"])
if test x_$with_drill != x_no ; then
	AC_SUBST(DRILL,[drill])
	AC_SUBST(INSTALL_DRILL,[install-drill])
	AC_SUBST(UNINSTALL_DRILL,[uninstall-drill])
	AC_SUBST(CLEAN_DRILL,[clean-drill])
	AC_SUBST(LINT_DRILL,[lint-drill])
	if test -e $srcdir/drill/config.h -o -e drill/config.h ; then
		AC_MSG_ERROR([
A config.h was detected in the drill subdirectory.
This does not work with the --with-drill option.
Please remove the config.h from the drill subdirectory 
or do not use the --with-drill option.])
	fi
else
	AC_SUBST(DRILL,[""])
	AC_SUBST(INSTALL_DRILL,[""])
	AC_SUBST(UNINSTALL_DRILL,[""])
	AC_SUBST(CLEAN_DRILL,[""])
	AC_SUBST(LINT_DRILL,[""])
fi


AC_ARG_WITH(examples, AC_HELP_STRING([--with-examples], 
 [Also build examples.]), 
 [],[with_examples="no"])
if test x_$with_examples != x_no ; then
	AC_SUBST(EXAMPLES,[examples])
	AC_SUBST(INSTALL_EXAMPLES,[install-examples])
	AC_SUBST(UNINSTALL_EXAMPLES,[uninstall-examples])
	AC_SUBST(CLEAN_EXAMPLES,[clean-examples])
	AC_SUBST(LINT_EXAMPLES,[lint-examples])
	if test -e $srcdir/examples/config.h -o -e examples/config.h ; then
		AC_MSG_ERROR([
A config.h was detected in the examples subdirectory.
This does not work with the --with-examples option.
Please remove the config.h from the examples subdirectory 
or do not use the --with-examples option.])
	fi
else
	AC_SUBST(EXAMPLES,[""])
	AC_SUBST(INSTALL_EXAMPLES,[""])
	AC_SUBST(UNINSTALL_EXAMPLES,[""])
	AC_SUBST(CLEAN_EXAMPLES,[""])
	AC_SUBST(LINT_EXAMPLES,[""])
fi

# add option to disable installation of ldns-config script
AC_ARG_ENABLE(ldns-config, AC_HELP_STRING([--disable-ldns-config], [disable installation of ldns-config (default=enabled)]),
	enable_ldns_config=$enableval, enable_ldns_config=yes)
if test "x$enable_ldns_config" = xyes; then
	AC_SUBST(INSTALL_CONFIG, [install-config])
	AC_SUBST(INSTALL_CONFIG_MANPAGE, [install-config-manpage])
	AC_SUBST(UNINSTALL_CONFIG, [uninstall-config])
	AC_SUBST(UNINSTALL_CONFIG_MANPAGE, [uninstall-config-manpage])
else
	AC_SUBST(INSTALL_CONFIG, [""])
	AC_SUBST(INSTALL_CONFIG_MANPAGE, [""])
	AC_SUBST(UNINSTALL_CONFIG, [""])
	AC_SUBST(UNINSTALL_CONFIG_MANPAGE, [""])
fi

# add option to disable library printing to stderr
AC_ARG_ENABLE(stderr-msgs, AC_HELP_STRING([--enable-stderr-msgs], [Enable printing to stderr (default=disabled)]), enable_stderr_msgs=$enableval, enable_stderr_msgs=no)
case "$enable_stderr_msgs" in
    no) dnl default
        ;;
    *)  
        AC_DEFINE_UNQUOTED([STDERR_MSGS], [1], [Define this to enable messages to stderr.])
        ;;
esac

AX_HAVE_POLL(
  [AX_CONFIG_FEATURE_ENABLE(poll)],
  [AX_CONFIG_FEATURE_DISABLE(poll)])
AX_CONFIG_FEATURE(
  [poll], [This platform supports poll(7)],
  [HAVE_POLL], [This platform supports poll(7).])

# check for python
PYTHON_X_CFLAGS=""
ldns_with_pyldns=no
ldns_with_pyldnsx=no
AC_ARG_WITH(pyldns, AC_HELP_STRING([--with-pyldns], 
 [generate python library, or --without-pyldns to disable Python support.]), 
 [],[ withval="no" ])
ldns_have_python=no
if test x_$withval != x_no; then
   sinclude(ax_python_devel.m4)
   ac_save_LIBS="$LIBS" dnl otherwise AC_PYTHON_DEVEL thrashes $LIBS

   AX_PYTHON_DEVEL([>= '2.4.0'])
   if test ! -z "$ac_python_version"; then
	ldns_have_python=yes
   fi

   # pass additional Python 3 option to SWIG
   if test `$PYTHON -c "import sys; \
       ver = sys.version.split()[[0]]; \
       print(ver >= '3')"` = "True"; then
       AC_SUBST(SWIGPY3, ["-py3 -DPY3"])
   fi

   # check for SWIG
   if test x_$ldns_have_python != x_no; then
        sinclude(ax_pkg_swig.m4)

        # check for >=SWIG-2.0.4 if Python 3.2 used
        if test `$PYTHON -c "import sys; \
            ver = sys.version.split()[[0]]; \
            print(ver >= '3.2')"` = "True"; then
            AX_PKG_SWIG(2.0.4, [], [AC_MSG_ERROR([SWIG-2.0.4 is required to build pyldns for Python 3.2 and greater.])])
        else
            AX_PKG_SWIG
        fi

	if test ! -x "$SWIG"; then
		AC_MSG_ERROR([failed to find SWIG tool, install it, or do not build pyldns])
	else
		AC_DEFINE(HAVE_SWIG,1,[Define if you have SWIG libraries and header files.])
		AC_SUBST(PYLDNS, "pyldns")
		AC_SUBST(swig, "$SWIG")
		ldns_with_pyldns=yes
	fi
   else
	AC_MSG_RESULT([*** don't have Python, skipping SWIG, no pyldns ***]) # '
   fi

   # xtra cflags for pyldns
   if test x_$ldns_have_python != x_no; then
	ACX_CHECK_COMPILER_FLAG(fno-strict-aliasing, [PYTHON_X_CFLAGS="-fno-strict-aliasing"])
	ACX_CHECK_COMPILER_FLAG(Wno-missing-field-initializers, [PYTHON_X_CFLAGS="-Wno-missing-field-initializers $PYTHON_X_CFLAGS"])
	ACX_CHECK_COMPILER_FLAG(Wno-unused-parameter, [PYTHON_X_CFLAGS="-Wno-unused-parameter $PYTHON_X_CFLAGS"])
	ACX_CHECK_COMPILER_FLAG(Wno-unused-variable, [PYTHON_X_CFLAGS="-Wno-unused-variable $PYTHON_X_CFLAGS"])
   fi
fi
AC_SUBST(PYTHON_X_CFLAGS)

# Check for pyldnsx
AC_ARG_WITH(pyldnsx, AC_HELP_STRING([--without-pyldnsx], 
  [Do not install the ldnsx python module, or --with-pyldnsx to install it.]), 
  [],[ withval="with_pyldns" ])
if test x_$withval != x_no; then
  if test x_$ldns_with_pyldns != x_no; then
    AC_SUBST(PYLDNSX, "pyldnsx")
    ldns_with_pyldnsx=yes
  else
    if test x_$withval != x_with_pyldns; then
      AC_MSG_ERROR([--with-pyldns is needed for the ldnsx python module])
    fi
  fi
fi

if test x_$ldns_with_pyldns != x_no; then
  AC_SUBST(PYLDNSINST, "install-pyldns")dnl
  AC_SUBST(PYLDNSUNINST, "uninstall-pyldns")
else
  AC_SUBST(PYLDNSINST, "")dnl
  AC_SUBST(PYLDNSUNINST, "")
fi
if test x_$ldns_with_pyldnsx != x_no; then
  AC_SUBST(PYLDNSXINST, "install-pyldnsx")dnl
  AC_SUBST(PYLDNSXUNINST, "uninstall-pyldnsx")
else
  AC_SUBST(PYLDNSXINST, "")dnl
  AC_SUBST(PYLDNSXUNINST, "")
fi

# check for perl
ldns_with_p5_dns_ldns=no
AC_ARG_WITH(p5-dns-ldns, AC_HELP_STRING([--with-p5-dns-ldns], 
 [generate DNS::LDNS perl bindings]), 
 [],[ withval="no" ])
ldns_have_perl=no
if test x_$withval != x_no; then
   AC_PATH_PROG([PERL], [perl])
   if test -z "$PERL"; then
      AC_MSG_ERROR([Cannot find perl in your system path])
   fi
   AC_SUBST(P5_DNS_LDNS, "p5-dns-ldns")dnl
   AC_SUBST(TEST_P5_DNS_LDNS, "test-p5-dns-ldns")dnl
   AC_SUBST(INSTALL_P5_DNS_LDNS, "install-p5-dns-ldns")dnl
   AC_SUBST(UNINSTALL_P5_DNS_LDNS, "uninstall-p5-dns-ldns")dnl
   AC_SUBST(CLEAN_P5_DNS_LDNS, "clean-p5-dns-ldns")
else
   AC_SUBST(P5_DNS_LDNS, "")dnl
   AC_SUBST(TEST_P5_DNS_LDNS, "")dnl
   AC_SUBST(INSTALL_P5_DNS_LDNS, "")dnl
   AC_SUBST(UNINSTALL_P5_DNS_LDNS, "")dnl
   AC_SUBST(CLEAN_P5_DNS_LDNS, "")
fi

# Use libtool
ACX_LIBTOOL_C_ONLY

tmp_CPPFLAGS=$CPPFLAGS
tmp_LDFLAGS=$LDFLAGS
tmp_LIBS=$LIBS

ACX_WITH_SSL_OPTIONAL
AC_MSG_CHECKING([for LibreSSL])
if grep VERSION_TEXT $ssldir/include/openssl/opensslv.h | grep "LibreSSL" >/dev/null; then
	AC_MSG_RESULT([yes])
	AC_DEFINE([HAVE_LIBRESSL], [1], [Define if we have LibreSSL])
else
	AC_MSG_RESULT([no])
fi
AC_CHECK_FUNCS([EVP_sha256 EVP_sha384 EVP_sha512 ENGINE_load_cryptodev EVP_PKEY_keygen ECDSA_SIG_get0 EVP_MD_CTX_new EVP_PKEY_base_id DSA_SIG_set0 DSA_SIG_get0 EVP_dss1 DSA_get0_pqg DSA_get0_key])

# for macosx, see if glibtool exists and use that
# BSD's need to know the version...
#AC_CHECK_PROG(glibtool, glibtool, [glibtool], )
#AC_CHECK_PROGS(libtool, [libtool15 libtool], [./libtool])

AC_ARG_ENABLE(sha2, AC_HELP_STRING([--disable-sha2], [Disable SHA256 and SHA512 RRSIG support]))
case "$enable_sha2" in
    no)
        ;;
    yes|*)
        if test "x$HAVE_SSL" != "xyes"; then
            AC_MSG_ERROR([SHA2 enabled, but no SSL support])
        fi
	AC_MSG_CHECKING(for SHA256 and SHA512)
	AC_CHECK_FUNC(SHA256_Init, [], [
		AC_MSG_ERROR([No SHA2 functions found in OpenSSL: please upgrade OpenSSL or rerun with --disable-sha2])
		])
	AC_DEFINE_UNQUOTED([USE_SHA2], [1], [Define this to enable SHA256 and SHA512 support.])
        ;;
esac

# check wether gost also works
AC_DEFUN([AC_CHECK_GOST_WORKS],
[AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING([if GOST works])
if test c${cross_compiling} = cno; then
BAKCFLAGS="$CFLAGS"
if test -n "$ssldir"; then
	CFLAGS="$CFLAGS -Wl,-rpath,$ssldir/lib"
fi
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <string.h>
#include <openssl/ssl.h>
#include <openssl/evp.h>
#include <openssl/engine.h>
#include <openssl/conf.h>
/* routine to load gost (from sldns) */
int load_gost_id(void)
{
	static int gost_id = 0;
	const EVP_PKEY_ASN1_METHOD* meth;
	ENGINE* e;

	if(gost_id) return gost_id;

	/* see if configuration loaded gost implementation from other engine*/
	meth = EVP_PKEY_asn1_find_str(NULL, "gost2001", -1);
	if(meth) {
		EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
		return gost_id;
	}

	/* see if engine can be loaded already */
	e = ENGINE_by_id("gost");
	if(!e) {
		/* load it ourself, in case statically linked */
		ENGINE_load_builtin_engines();
		ENGINE_load_dynamic();
		e = ENGINE_by_id("gost");
	}
	if(!e) {
		/* no gost engine in openssl */
		return 0;
	}
	if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
		ENGINE_finish(e);
		ENGINE_free(e);
		return 0;
	}

	meth = EVP_PKEY_asn1_find_str(&e, "gost2001", -1);
	if(!meth) {
		/* algo not found */
		ENGINE_finish(e);
		ENGINE_free(e);
		return 0;
	}
	EVP_PKEY_asn1_get0_info(&gost_id, NULL, NULL, NULL, NULL, meth);
	return gost_id;
}
int main(void) { 
	EVP_MD_CTX* ctx;
	const EVP_MD* md;
	unsigned char digest[64]; /* its a 256-bit digest, so uses 32 bytes */
	const char* str = "Hello world";
	const unsigned char check[] = {
		0x40 , 0xed , 0xf8 , 0x56 , 0x5a , 0xc5 , 0x36 , 0xe1 ,
		0x33 , 0x7c , 0x7e , 0x87 , 0x62 , 0x1c , 0x42 , 0xe0 ,
		0x17 , 0x1b , 0x5e , 0xce , 0xa8 , 0x46 , 0x65 , 0x4d ,
		0x8d , 0x3e , 0x22 , 0x9b , 0xe1 , 0x30 , 0x19 , 0x9d
	};
	OPENSSL_config(NULL);
	(void)load_gost_id();
	md = EVP_get_digestbyname("md_gost94");
	if(!md) return 1;
	memset(digest, 0, sizeof(digest));
	ctx = EVP_MD_CTX_create();
	if(!ctx) return 2;
	if(!EVP_DigestInit_ex(ctx, md, NULL)) return 3;
	if(!EVP_DigestUpdate(ctx, str, 10)) return 4;
	if(!EVP_DigestFinal_ex(ctx, digest, NULL)) return 5;
	/* uncomment to see the hash calculated.
		{int i;
		for(i=0; i<32; i++)
			printf(" %2.2x", (int)digest[i]);
		printf("\n");}
	*/
	if(memcmp(digest, check, sizeof(check)) != 0)
		return 6;
	return 0;
}
]])] , [eval "ac_cv_c_gost_works=yes"], [eval "ac_cv_c_gost_works=no"])
CFLAGS="$BAKCFLAGS"
else
eval "ac_cv_c_gost_works=maybe"
fi
])dnl

AC_ARG_ENABLE(gost, AC_HELP_STRING([--disable-gost], [Disable GOST support]))
case "$enable_gost" in
    no)
        ;;
    *)  dnl default
        if test "x$HAVE_SSL" != "xyes"; then
            AC_MSG_ERROR([GOST enabled, but no SSL support])
        fi
        AC_MSG_CHECKING(for GOST)
        AC_CHECK_FUNC(EVP_PKEY_set_type_str, [],[AC_MSG_ERROR([OpenSSL >= 1.0.0 is needed for GOST support or rerun with --disable-gost])])
        AC_CHECK_FUNC(EC_KEY_new, [], [AC_MSG_ERROR([No ECC functions found in OpenSSL: please upgrade OpenSSL or rerun with --disable-gost])])
	AC_CHECK_GOST_WORKS
	AC_ARG_ENABLE(gost-anyway, AC_HELP_STRING([--enable-gost-anyway], [Enable GOST even whithout a GOST engine installed]))
	if test "$ac_cv_c_gost_works" != "no" -o "$enable_gost_anyway" = "yes"; then
		if test "$ac_cv_c_gost_works" = "no"; then
			AC_MSG_RESULT([no, but compiling with GOST support anyway])
		else
			AC_MSG_RESULT([yes])
		fi
		use_gost="yes"
		AC_DEFINE([USE_GOST], [1], [Define this to enable GOST support.])
	else
		AC_MSG_RESULT([no])
		AC_MSG_WARN([Gost support does not work because the engine is missing.])
		AC_MSG_WARN([Install gost-engine first or use the --enable-gost-anyway to compile with GOST support anyway])
		AC_MSG_WARN([See also https://github.com/gost-engine/engine/wiki for information about gost-engine])
	fi
        ;;
esac

AC_ARG_ENABLE(ecdsa, AC_HELP_STRING([--disable-ecdsa], [Disable ECDSA support]))
case "$enable_ecdsa" in
    no)
      ;;
    *) dnl default
      if test "x$HAVE_SSL" != "xyes"; then
        AC_MSG_ERROR([ECDSA enabled, but no SSL support])
      fi
      AC_CHECK_FUNC(ECDSA_sign, [], [AC_MSG_ERROR([OpenSSL does not support ECDSA: please upgrade OpenSSL or rerun with --disable-ecdsa])])
      AC_CHECK_FUNC(SHA384_Init, [], [AC_MSG_ERROR([OpenSSL does not support SHA384: please upgrade OpenSSL or rerun with --disable-ecdsa])])
      AC_CHECK_DECLS([NID_X9_62_prime256v1, NID_secp384r1], [], [AC_MSG_ERROR([OpenSSL does not support the ECDSA curves: please upgrade OpenSSL or rerun with --disable-ecdsa])], [AC_INCLUDES_DEFAULT
#include <openssl/evp.h>
      ])
      # we now know we have ECDSA and the required curves.
      AC_DEFINE_UNQUOTED([USE_ECDSA], [1], [Define this to enable ECDSA support.])
      ;;
esac

AC_ARG_ENABLE(dsa, AC_HELP_STRING([--disable-dsa], [Disable DSA support]))
case "$enable_dsa" in
    no)
      ;;
    *) dnl default
      # detect if DSA is supported, and turn it off if not.
      AC_CHECK_FUNC(DSA_SIG_new, [
	AC_DEFINE_UNQUOTED([USE_DSA], [1], [Define this to enable DSA support.])
      ], [if test "x$enable_dsa" = "xyes"; then AC_MSG_ERROR([OpenSSL does not support DSA and you used --enable-dsa.])
	  fi ])
      ;;
esac

AC_ARG_ENABLE(ed25519, AC_HELP_STRING([--enable-ed25519], [Enable ED25519 support (experimental)]))
case "$enable_ed25519" in
    yes)
      if test "x$HAVE_SSL" != "xyes"; then
        AC_MSG_ERROR([ED25519 enabled, but no SSL support])
      fi
      AC_CHECK_DECLS([NID_ED25519], [], [AC_MSG_ERROR([OpenSSL does not support the EDDSA curve: please upgrade OpenSSL or rerun with --disable-ed25519])], [AC_INCLUDES_DEFAULT
#include <openssl/evp.h>
      ])
      AC_DEFINE_UNQUOTED([USE_ED25519], [1], [Define this to enable ED25519 support.])
      ;;
    *|no) dnl default
      ;;
esac

AC_ARG_ENABLE(ed448, AC_HELP_STRING([--enable-ed448], [Enable ED448 support (experimental)]))
case "$enable_ed448" in
    yes)
      if test "x$HAVE_SSL" != "xyes"; then
        AC_MSG_ERROR([ED448 enabled, but no SSL support])
      fi
      AC_CHECK_DECLS([NID_ED448], [], [AC_MSG_ERROR([OpenSSL does not support the EDDSA curve: please upgrade OpenSSL or rerun with --disable-ed448])], [AC_INCLUDES_DEFAULT
#include <openssl/evp.h>
      ])
      AC_DEFINE_UNQUOTED([USE_ED448], [1], [Define this to enable ED448 support.])
      ;;
    *|no) dnl default
      ;;
esac

AC_ARG_ENABLE(dane, AC_HELP_STRING([--disable-dane], [Disable DANE support]))
AC_ARG_ENABLE(dane-verify, AC_HELP_STRING([--disable-dane-verify], [Disable DANE verify support]))
AC_ARG_ENABLE(dane-ta-usage, AC_HELP_STRING([--disable-dane-ta-usage], [Disable DANE-TA usage type support]))

AC_ARG_ENABLE(full-dane,, [
	enable_dane_ta_usage=yes
	enable_dane_verify=yes
	enable_dane=yes
])
AC_ARG_ENABLE(no-dane-ta-usage,, [
	enable_dane_ta_usage=no
	enable_dane_verify=yes
	enable_dane=yes
])
AC_ARG_ENABLE(no-dane-verify,, [
	enable_dane_ta_usage=no
	enable_dane_verify=no
	enable_dane=yes
])
case "$enable_dane" in
    no)
      AC_SUBST(ldns_build_config_use_dane, 0)
      AC_SUBST(ldns_build_config_use_dane_verify, 0)
      AC_SUBST(ldns_build_config_use_dane_ta_usage, 0)
      ;;
    *) dnl default
      if test "x$HAVE_SSL" != "xyes"; then
        AC_MSG_ERROR([DANE enabled, but no SSL support])
      fi
      AC_CHECK_FUNC(X509_check_ca, [], [AC_MSG_ERROR([OpenSSL does not support DANE: please upgrade OpenSSL or rerun with --disable-dane])])
      AC_SUBST(ldns_build_config_use_dane, 1)
      AC_DEFINE_UNQUOTED([USE_DANE], [1], [Define this to enable DANE support.])
      case "$enable_dane_verify" in
          no)
            AC_SUBST(ldns_build_config_use_dane_verify, 0)
            AC_SUBST(ldns_build_config_use_dane_ta_usage, 0)
	    ;;
	  *)
	    AC_SUBST(ldns_build_config_use_dane_verify, 1)
	    AC_DEFINE_UNQUOTED([USE_DANE_VERIFY], [1], [Define this to enable DANE verify support.])
            case "$enable_dane_ta_usage" in
                no)
                  AC_SUBST(ldns_build_config_use_dane_ta_usage, 0)
                  ;;
                *) dnl default
      	    LIBS="-lssl $LIBS"
                  AC_CHECK_FUNC(SSL_get0_dane, [], [AC_MSG_ERROR([OpenSSL does not support offline DANE verification (Needed for the DANE-TA usage type).  Please upgrade OpenSSL to version >= 1.1.0 or rerun with --disable-dane-verify or --disable-dane-ta-usage])])
                  LIBSSL_LIBS="$LIBSSL_LIBS -lssl"
                  AC_SUBST(ldns_build_config_use_dane_ta_usage, 1)
                  AC_DEFINE_UNQUOTED([USE_DANE_TA_USAGE], [1], [Define this to enable DANE-TA usage type support.])
                  ;;
            esac
      esac
      ;;
esac

AC_ARG_ENABLE(rrtype-ninfo, AC_HELP_STRING([--enable-rrtype-ninfo], [Enable draft RR type ninfo.]))
case "$enable_rrtype_ninfo" in
	yes)
		AC_DEFINE_UNQUOTED([RRTYPE_NINFO], [], [Define this to enable RR type NINFO.])
		;;
	no|*)
		;;
esac
AC_ARG_ENABLE(rrtype-rkey, AC_HELP_STRING([--enable-rrtype-rkey], [Enable draft RR type rkey.]))
case "$enable_rrtype_rkey" in
	yes)
		AC_DEFINE_UNQUOTED([RRTYPE_RKEY], [], [Define this to enable RR type RKEY.])
		;;
	no|*)
		;;
esac
AC_ARG_ENABLE(rrtype-openpgpkey, AC_HELP_STRING([--disable-rrtype-openpgpkey], [Disable openpgpkey RR type.]))
case "$enable_rrtype_openpgpkey" in
	no)
		;;
	yes|*)
		AC_DEFINE_UNQUOTED([RRTYPE_OPENPGPKEY], [], [Define this to enable RR type OPENPGPKEY.])
		;;
esac
AC_ARG_ENABLE(rrtype-ta, AC_HELP_STRING([--enable-rrtype-ta], [Enable draft RR type ta.]))
case "$enable_rrtype_ta" in
	yes)
		AC_DEFINE_UNQUOTED([RRTYPE_TA], [], [Define this to enable RR type TA.])
		;;
	no|*)
		;;
esac
AC_ARG_ENABLE(rrtype-avc, AC_HELP_STRING([--enable-rrtype-avc], [Enable draft RR type avc.]))
case "$enable_rrtype_avc" in
	yes)
		AC_DEFINE_UNQUOTED([RRTYPE_AVC], [], [Define this to enable RR type AVC.])
		;;
	no|*)
		;;
esac

AC_SUBST(LIBSSL_CPPFLAGS)
AC_SUBST(LIBSSL_LDFLAGS)
AC_SUBST(LIBSSL_LIBS)
if test "x$HAVE_SSL" = "xyes"; then
AC_SUBST(LIBSSL_SSL_LIBS, ["-lssl $LIBSSL_LIBS"])
fi
CPPFLAGS=$tmp_CPPFLAGS
LDFLAGS=$tmp_LDFLAGS
LIBS=$tmp_LIBS


# add option to disable the evil rpath
ACX_ARG_RPATH

#AC_RUN_IFELSE([AC_LANG_SOURCE(
#[
#int main()
#{
#short one = 1;
#char *cp = (char*)&one;
#if ( *cp == 0 )
#return(0);
#else
#return(1);
#}
#])], [],[
#AC_DEFINE(CONFCHECK_LITTLE_ENDIAN, 1, [system appears to be little-endian])
#],[])

# should define WORDS_BIGENDIAN if the system is big-endian
AC_C_BIGENDIAN

# Checks for header files.
AC_HEADER_STDC
AC_HEADER_STDBOOL
#AC_HEADER_SYS_WAIT
#AC_CHECK_HEADERS([getopt.h fcntl.h stdlib.h string.h strings.h unistd.h])
# do the very minimum - we can always extend this
AC_CHECK_HEADERS([getopt.h stdarg.h openssl/ssl.h netinet/in.h time.h arpa/inet.h netdb.h],,, [AC_INCLUDES_DEFAULT])
AC_CHECK_HEADERS(sys/param.h sys/mount.h,,,
[AC_INCLUDES_DEFAULT
  [
   #if HAVE_SYS_PARAM_H
   # include <sys/param.h>
   #endif
  ]
])
AC_CHECK_HEADER(sys/socket.h,
[
include_sys_socket_h='#include <sys/socket.h>'
AC_DEFINE(HAVE_SYS_SOCKET_H, 1, [define if you have sys/socket.h])
],[
include_sys_socket_h=''
],[AC_INCLUDES_DEFAULT
  [
   #if HAVE_SYS_PARAM_H
   # include <sys/param.h>
   #endif
  ]
])
AC_SUBST(include_sys_socket_h)
AC_CHECK_HEADER(inttypes.h,
[
include_inttypes_h='#include <inttypes.h>'
AC_DEFINE(HAVE_INTTYPES_H, 1, [define if you have inttypes.h])
AC_SUBST(ldns_build_config_have_inttypes_h, 1)
],[
include_inttypes_h=''
AC_SUBST(ldns_build_config_have_inttypes_h, 0)
],[AC_INCLUDES_DEFAULT
])
AC_SUBST(include_inttypes_h)
AC_CHECK_HEADER(sys/types.h,
[
include_systypes_h='#include <sys/types.h>'
AC_DEFINE(HAVE_SYS_TYPES_H, 1, [define if you have sys/types.h])
],[
include_systypes_h=''
],[AC_INCLUDES_DEFAULT
])
AC_SUBST(include_systypes_h)
AC_CHECK_HEADER(unistd.h,
[
include_unistd_h='#include <unistd.h>'
AC_DEFINE(HAVE_UNISTD_H, 1, [define if you have unistd.h])
],[
include_unistd_h=''
],[AC_INCLUDES_DEFAULT
])
AC_SUBST(include_unistd_h)

AC_CHECK_SIZEOF(time_t,,[
AC_INCLUDES_DEFAULT
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
])

if test x_$with_examples != x_no; then
AC_CHECK_HEADERS([pcap.h],,, [AC_INCLUDES_DEFAULT])
AC_CHECK_LIB(pcap, pcap_open_offline, [
	AC_DEFINE([HAVE_LIBPCAP], [1], [Define to 1 if you have the `pcap' library (-lpcap).])dnl`
	AC_SUBST([LIBPCAP_LIBS], [-lpcap])
    ], [
	AC_MSG_WARN([Can't find pcap library (needed for ldns-dpa, will not build dpa now.)])dnl'
	AC_SUBST([LIBPCAP_LIBS], [])
    ]
)
AC_CHECK_HEADERS([netinet/in_systm.h net/if.h netinet/ip.h netinet/udp.h netinet/igmp.h netinet/if_ether.h netinet/ip6.h net/ethernet.h netinet/ip_compat.h],,, [
AC_INCLUDES_DEFAULT 
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif])
fi

ACX_TYPE_SOCKLEN_T
if test "x$ac_cv_type_socklen_t" = xyes; then
  AC_SUBST(ldns_build_config_have_socklen_t, 1)
else
  AC_SUBST(ldns_build_config_have_socklen_t, 0)
fi
AC_TYPE_SIZE_T
AC_CHECK_TYPE(ssize_t, int)
dnl AC_TYPE_INTPTR_T does not work on all platforms (autoconf)
AC_CHECK_TYPE(intptr_t, size_t)
AC_CHECK_TYPE(in_addr_t, [], [AC_DEFINE([in_addr_t], [uint32_t], [in_addr_t])], [
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif])
AC_CHECK_TYPE(in_port_t, [], [AC_DEFINE([in_port_t], [uint16_t], [in_port_t])], [
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif])
ACX_CHECK_SS_FAMILY

AC_FUNC_MALLOC
AC_FUNC_REALLOC

AC_REPLACE_FUNCS(b64_pton)
AC_REPLACE_FUNCS(b64_ntop)
AC_REPLACE_FUNCS(calloc)
AC_REPLACE_FUNCS(timegm)
AC_REPLACE_FUNCS(gmtime_r)
AC_REPLACE_FUNCS(ctime_r)
AC_REPLACE_FUNCS(localtime_r)
AC_REPLACE_FUNCS(isblank)
AC_REPLACE_FUNCS(isascii)
AC_REPLACE_FUNCS(inet_aton)
AC_REPLACE_FUNCS(inet_pton)
AC_REPLACE_FUNCS(inet_ntop)
AC_REPLACE_FUNCS(snprintf)
AC_REPLACE_FUNCS(strlcpy)
AC_REPLACE_FUNCS(memmove)
AC_FUNC_FORK
AC_CHECK_FUNCS([endprotoent endservent sleep random fcntl strtoul bzero memset b32_ntop b32_pton])
if test "x$HAVE_B32_NTOP" = "xyes"; then
	AC_SUBST(ldns_build_config_have_b32_ntop, 1)
else
	AC_SUBST(ldns_build_config_have_b32_ntop, 0)
fi
if test "x$HAVE_B32_PTON" = "xyes"; then
	AC_SUBST(ldns_build_config_have_b32_pton, 1)
else
	AC_SUBST(ldns_build_config_have_b32_pton, 0)
fi

ACX_CHECK_GETADDRINFO_WITH_INCLUDES
if test $ac_cv_func_getaddrinfo = no; then
	AC_LIBOBJ([fake-rfc2553])
fi
if test "$USE_WINSOCK" = 1; then
	AC_CHECK_TOOL(WINDRES, windres)
fi
ACX_FUNC_IOCTLSOCKET

#AC_SEARCH_LIBS(RSA_new, [crypto])

ACX_CHECK_FORMAT_ATTRIBUTE
ACX_CHECK_UNUSED_ATTRIBUTE

# check OSX deployment target, if needed
if echo $build_os | grep darwin > /dev/null; then
  sdk_p=`xcode-select -print-path`;
  sdk_v="$( /usr/bin/xcrun --show-sdk-version )";
  case $sdk_v in
       10.9|10.8)   sdk_c="10.7";;
       10.11|10.10|*) sdk_c="10.10";;
  esac
  export MACOSX_DEPLOYMENT_TARGET="${sdk_c}";
  export CFLAGS="$CFLAGS -mmacosx-version-min=${sdk_c} -isysroot ${sdk_p}/Platforms/MacOSX.platform/Developer/SDKs/MacOSX${sdk_v}.sdk";
fi

AC_DEFINE([SYSCONFDIR], [sysconfdir], [System configuration dir])

AC_ARG_WITH(trust-anchor, AC_HELP_STRING([--with-trust-anchor=KEYFILE], [Default location of the trust anchor file for drill and ldns-dane. [default=SYSCONFDIR/unbound/root.key]]), [
 AC_SUBST([LDNS_TRUST_ANCHOR_FILE], ["$withval"])
 AC_MSG_NOTICE([Default trust anchor: $withval])
],[
 AC_SUBST([LDNS_TRUST_ANCHOR_FILE], ["\$(sysconfdir)/unbound/root.key"])
])

AC_ARG_WITH(ca-file, AC_HELP_STRING([--with-ca-file=CAFILE], [File containing CA certificates for ldns-dane]), [
 AC_DEFINE([HAVE_DANE_CA_FILE], [1], [Is a CAFILE given at configure time])
 AC_DEFINE_UNQUOTED([LDNS_DANE_CA_FILE], ["$withval"], [Is a CAFILE given at configure time])
 AC_MSG_NOTICE([Using CAfile: $withval])
 AC_SUBST(DEFAULT_CAFILE, ["Default is $withval"])
],[
 AC_DEFINE([HAVE_DANE_CA_FILE], [0], [Is a CAFILE given at configure time])
 AC_SUBST(DEFAULT_CAFILE, [])
])

AC_ARG_WITH(ca-path, AC_HELP_STRING([--with-ca-path=CAPATH], [Directory containing CA certificate files for ldns-dane]), [
 AC_DEFINE([HAVE_DANE_CA_PATH], [1], [Is a CAPATH given at configure time])
 AC_DEFINE_UNQUOTED([LDNS_DANE_CA_PATH], ["$withval"], [Is a CAPATH given at configure time])
 AC_MSG_NOTICE([Using CApath: $withval])
 AC_SUBST(DEFAULT_CAPATH, ["Default is $withval"])
],[
 AC_DEFINE([HAVE_DANE_CA_PATH], [0], [Is a CAPATH given at configure time])
 AC_SUBST(DEFAULT_CAPATH, [])
])

AH_BOTTOM([
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>

#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1234
#endif

#ifndef BIG_ENDIAN
#define BIG_ENDIAN 4321
#endif

#ifndef BYTE_ORDER
#ifdef WORDS_BIGENDIAN
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif /* WORDS_BIGENDIAN */
#endif /* BYTE_ORDER */

#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif

#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif

#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif

#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif

#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif

#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif

#ifdef HAVE_WS2TCPIP_H
#include <ws2tcpip.h>
#endif
]
AHX_CONFIG_W32_FD_SET_T
)

AH_BOTTOM([
#ifdef __cplusplus
extern "C" {
#endif

int ldns_b64_ntop(uint8_t const *src, size_t srclength,
	 	  char *target, size_t targsize);
/**
 * calculates the size needed to store the result of b64_ntop
 */
/*@unused@*/
static inline size_t ldns_b64_ntop_calculate_size(size_t srcsize)
{
	return ((((srcsize + 2) / 3) * 4) + 1);
}
int ldns_b64_pton(char const *src, uint8_t *target, size_t targsize);
/**
 * calculates the size needed to store the result of ldns_b64_pton
 */
/*@unused@*/
static inline size_t ldns_b64_pton_calculate_size(size_t srcsize)
{
	return (((((srcsize + 3) / 4) * 3)) + 1);
}

/**
 * Given in dnssec_zone.c, also used in dnssec_sign.c:w

 */
int ldns_dname_compare_v(const void *a, const void *b);

#ifndef HAVE_SLEEP
/* use windows sleep, in millisecs, instead */
#define sleep(x) Sleep((x)*1000)
#endif

#ifndef HAVE_RANDOM
#define srandom(x) srand(x)
#define random(x) rand(x)
#endif

#ifndef HAVE_TIMEGM
#include <time.h>
time_t timegm (struct tm *tm);
#endif /* !TIMEGM */
#ifndef HAVE_GMTIME_R
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#endif
#ifndef HAVE_LOCALTIME_R
struct tm *localtime_r(const time_t *timep, struct tm *result);
#endif
#ifndef HAVE_ISBLANK
int isblank(int c);
#endif /* !HAVE_ISBLANK */
#ifndef HAVE_ISASCII
int isascii(int c);
#endif /* !HAVE_ISASCII */
#ifndef HAVE_SNPRINTF
#include <stdarg.h>
int snprintf (char *str, size_t count, const char *fmt, ...);
int vsnprintf (char *str, size_t count, const char *fmt, va_list arg);
#endif /* HAVE_SNPRINTF */
#ifndef HAVE_INET_PTON
int inet_pton(int af, const char* src, void* dst);
#endif /* HAVE_INET_PTON */
#ifndef HAVE_INET_NTOP
const char *inet_ntop(int af, const void *src, char *dst, size_t size);
#endif
#ifndef HAVE_INET_ATON
int inet_aton(const char *cp, struct in_addr *addr);
#endif
#ifndef HAVE_MEMMOVE
void *memmove(void *dest, const void *src, size_t n);
#endif
#ifndef HAVE_STRLCPY
size_t strlcpy(char *dst, const char *src, size_t siz);
#endif

#ifdef USE_WINSOCK
#define SOCK_INVALID INVALID_SOCKET
#define close_socket(_s) do { if (_s > SOCK_INVALID) {closesocket(_s); _s = SOCK_INVALID;} } while(0)
#else
#define SOCK_INVALID -1
#define close_socket(_s) do { if (_s > SOCK_INVALID) {close(_s); _s = SOCK_INVALID;} } while(0)
#endif

#ifdef __cplusplus
}
#endif
#ifndef HAVE_GETADDRINFO
#include "compat/fake-rfc2553.h"
#endif
#ifndef HAVE_STRTOUL
#define strtoul (unsigned long)strtol
#endif
])

if test "x$HAVE_SSL" = "xyes"; then
	AC_SUBST(ldns_build_config_have_ssl, 1)
else
	AC_SUBST(ldns_build_config_have_ssl, 0)
fi
if test "x$ac_cv_c_format_attribute" = "xyes"; then
  AC_SUBST(ldns_build_config_have_attr_format, 1)
else
  AC_SUBST(ldns_build_config_have_attr_format, 0)
fi
if test "x$ac_cv_c_unused_attribute" = "xyes"; then
  AC_SUBST(ldns_build_config_have_attr_unused, 1)
else
  AC_SUBST(ldns_build_config_have_attr_unused, 0)
fi

CONFIG_FILES="Makefile ldns/common.h ldns/net.h ldns/util.h packaging/libldns.pc packaging/ldns-config"
AC_SUBST(CONFIG_FILES)
AC_CONFIG_FILES([$CONFIG_FILES])

AC_CONFIG_HEADER([ldns/config.h])
AC_OUTPUT
COPY_HEADER_FILES(ldns/, ldns/)

dnl AC_CONFIG_SUBDIRS([drill])