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knot-dns/configure.ac
Bron Gondwana 2946fe16f2 mod-alias: synthesise ALIAS records from locally-served targets 
Add the `mod-alias` query module which synthesises answers for ALIAS
records (type 65401) at query time by looking up the ALIAS target in
the server's zone database and copying the target's records into the
response with the original query name as the owner.

The module hooks at KNOTD_STAGE_PREANSWER and is attached at zone
scope (typically via a template).  Behaviour:

  * Fires for A/AAAA queries, any others passed through to the
    standard resolver.
  * ALIAS is additive: direct rrsets on the alias node are merged
    with the synthesised target rrsets.
  * Multiple ALIAS rdata on a node are followed and their results
    merged.
  * TTL = min(alias_ttl, all contributing source TTLs).
  * Targets not served by a zone in this server are ignored;
    external resolution is out of scope.
  * Synthesised records are not signed; pair with mod-onlinesign
    if signed answers are required.

The integration test runs in two random modes per invocation
(plain and DNSSEC-via-mod-onlinesign) so both code paths are
exercised over time.

Co-authored-by: Daniel Salzman <daniel.salzman@nic.cz>
2026-05-10 23:36:27 -04:00

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AC_PREREQ([2.69])
m4_define([knot_VERSION_MAJOR], 3)dnl
m4_define([knot_VERSION_MINOR], 6)dnl
m4_define([knot_VERSION_PATCH], )dnl Leave empty if the master branch!
m4_include([m4/knot-version.m4])
AC_INIT([knot], [knot_PKG_VERSION], [knot-dns@labs.nic.cz])
AM_INIT_AUTOMAKE([foreign std-options subdir-objects no-dist-gzip dist-xz -Wall -Werror])
AM_SILENT_RULES([yes])
AC_CONFIG_SRCDIR([src/knot])
AC_CONFIG_HEADERS([src/config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_USE_SYSTEM_EXTENSIONS
AC_CANONICAL_HOST
# Update library versions
# https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
KNOT_LIB_VERSION([libknot], 16, 0, 0)
KNOT_LIB_VERSION([libzscanner], 5, 0, 0)
AC_SUBST([KNOT_VERSION_MAJOR], knot_VERSION_MAJOR)
AC_SUBST([KNOT_VERSION_MINOR], knot_VERSION_MINOR)
AC_SUBST([KNOT_VERSION_PATCH], knot_VERSION_PATCH)
AC_CONFIG_FILES([src/libknot/version.h
src/libzscanner/version.h])
# Automatically update release date based on NEWS
AC_PROG_SED
release_date=$($SED -n 's/^Knot DNS .* (\(.*\))/\1/p;q;' ${srcdir}/NEWS)
AC_SUBST([RELEASE_DATE], $release_date)
# Set compiler compatibility flags
AC_PROG_CC
AC_PROG_CPP_WERROR
# Set default CFLAGS
CFLAGS="$CFLAGS -Wall -Wshadow -Werror=format-security -Werror=implicit -Werror=attributes -Wstrict-prototypes"
AX_CHECK_COMPILE_FLAG("-fpredictive-commoning", [CFLAGS="$CFLAGS -fpredictive-commoning"], [], "-Werror")
AX_CHECK_LINK_FLAG(["-Wl,--exclude-libs,ALL"], [ldflag_exclude_libs="-Wl,--exclude-libs,ALL"], [ldflag_exclude_libs=""], "")
AC_SUBST([LDFLAG_EXCLUDE_LIBS], $ldflag_exclude_libs)
# Get processor byte ordering
AC_C_BIGENDIAN([endianity=big-endian], [endianity=little-endian])
AS_IF([test "$endianity" = "little-endian"],[
AC_DEFINE([ENDIANITY_LITTLE], [1], [System is little-endian.])])
# Check if an archiver is available
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_INSTALL
# Initialize libtool
LT_INIT
# Build DLLs on Cygwin/MSYS2
AS_CASE([$host_os],
[cygwin* | msys*], [LT_NO_UNDEFINED="-no-undefined"]
)
AC_SUBST(LT_NO_UNDEFINED)
# Use pkg-config
PKG_PROG_PKG_CONFIG
m4_ifdef([PKG_INSTALLDIR], [PKG_INSTALLDIR], [AC_SUBST([pkgconfigdir], ['${libdir}/pkgconfig'])])
AC_CONFIG_FILES([src/knotd.pc
src/libknot.pc
src/libzscanner.pc
])
# Default directories
knot_prefix=$ac_default_prefix
AS_IF([test "$prefix" != NONE], [knot_prefix=$prefix])
run_dir="${localstatedir}/run/knot"
AC_ARG_WITH([rundir],
AS_HELP_STRING([--with-rundir=path], [Path to run-time variable data (pid, sockets...). [default=LOCALSTATEDIR/run/knot]]),
[run_dir=$withval])
AC_SUBST(run_dir)
storage_dir="${localstatedir}/lib/knot"
AC_ARG_WITH([storage],
AS_HELP_STRING([--with-storage=path], [Default storage directory (slave zones, persistent data). [default=LOCALSTATEDIR/lib/knot]]),
[storage_dir=$withval])
AC_SUBST(storage_dir)
config_dir="${sysconfdir}/knot"
AC_ARG_WITH([configdir],
AS_HELP_STRING([--with-configdir=path], [Default directory for configuration. [default=SYSCONFDIR/knot]]),
[config_dir=$withval])
AC_SUBST(config_dir)
module_dir=
module_instdir="${libdir}/knot/modules-${KNOT_VERSION_MAJOR}.${KNOT_VERSION_MINOR}"
AC_ARG_WITH([moduledir],
AS_HELP_STRING([--with-moduledir=path], [Path to auto-loaded dynamic modules. [default not set]]),
[module_dir=$withval module_instdir=$module_dir])
AC_SUBST(module_instdir)
AC_SUBST(module_dir)
# Build Knot DNS daemon
AC_ARG_ENABLE([daemon],
AS_HELP_STRING([--disable-daemon], [Don't build Knot DNS main daemon]), [], [enable_daemon=yes])
AM_CONDITIONAL([HAVE_DAEMON], [test "$enable_daemon" = "yes"])
# Build Knot DNS modules
AC_ARG_ENABLE([modules],
AS_HELP_STRING([--disable-modules], [Don't build Knot DNS modules]), [], [enable_modules=yes])
# Build Knot DNS utilities
AC_ARG_ENABLE([utilities],
AS_HELP_STRING([--disable-utilities], [Don't build Knot DNS utilities]), [], [enable_utilities=yes])
AM_CONDITIONAL([HAVE_UTILS], [test "$enable_utilities" = "yes"])
AM_CONDITIONAL([HAVE_LIBUTILS], test "$enable_utilities" != "no" -o \
"$enable_daemon" != "no")
# Build Knot DNS documentation
AC_ARG_ENABLE([documentation],
AS_HELP_STRING([--disable-documentation], [Don't build Knot DNS documentation]), [], [enable_documentation=yes])
AS_IF([test "$enable_documentation" != "no"], [
AC_PATH_PROG([SPHINXBUILD], [sphinx-build], [false])
AS_IF([test "$SPHINXBUILD" != "false"], [
enable_documentation="man html epub"
AC_PATH_PROG([PDFLATEX], [pdflatex], [false])
AS_IF([test "$PDFLATEX" != "false"], [
enable_documentation="$enable_documentation pdf"
])
])
])
AM_CONDITIONAL([HAVE_DOCS], [test "$enable_documentation" != "no"])
AM_CONDITIONAL([HAVE_SPHINX], [test "$SPHINXBUILD" != "false"])
AM_CONDITIONAL([HAVE_PDFLATEX], test "$PDFLATEX" != "false")
link_mode=$(test "$enable_shared" = "yes" && echo "shared" || echo "static")
######################
# Generic dependencies
######################
AC_ARG_ENABLE([fastparser],
AS_HELP_STRING([--disable-fastparser], [Disable use of fast zone parser]),
[], [AS_IF([test -d ".git"], [enable_fastparser=no], [enable_fastparser=yes])]
)
AM_CONDITIONAL([FAST_PARSER], [test "$enable_fastparser" = "yes"])
# GnuTLS crypto backend
PKG_CHECK_MODULES([gnutls], [gnutls >= 3.6.12], [
save_CFLAGS=$CFLAGS
save_LIBS=$LIBS
CFLAGS="$CFLAGS $gnutls_CFLAGS"
LIBS="$LIBS $gnutls_LIBS"
AC_CHECK_FUNC([gnutls_pkcs11_copy_pubkey],
[AC_DEFINE([HAVE_GNUTLS_PKCS11], [1], [gnutls_pkcs11_copy_pubkey available])
gnutls_pkcs11=yes], [gnutls_pkcs11=no])
AC_CHECK_FUNC([gnutls_early_cipher_get],
[AC_DEFINE([HAVE_GNUTLS_QUIC], [1], [gnutls_early_cipher_get available])
gnutls_quic=yes], [gnutls_quic=no])
CFLAGS=$save_CFLAGS
LIBS=$save_LIBS
], [
AS_IF([test "$enable_redis" != "module"], [AC_MSG_ERROR([GnuTLS library not found])])
])
# PKCS11 support
AC_ARG_ENABLE([pkcs11],
AS_HELP_STRING([--enable-pkcs11=auto|yes|no], [Support PKCS #11 [default=auto]]),
[], [enable_pkcs11=auto])
AS_CASE([$enable_pkcs11],
[auto], [AS_IF([test "$gnutls_pkcs11" = "yes"], [enable_pkcs11=yes], [enable_pkcs11=no])],
[yes], [AS_IF([test "$gnutls_pkcs11" = "yes"], [enable_pkcs11=yes], [
AC_MSG_ERROR([PKCS11 not available])])],
[no], [],
[*], [AC_MSG_ERROR([Invalid value of --enable-pkcs11.])]
)
AM_CONDITIONAL([ENABLE_PKCS11], [test "$enable_pkcs11" = "yes"])
AS_IF([test "$enable_pkcs11" != "no"], [
AC_DEFINE([ENABLE_PKCS11], [1], [Define to 1 to enable PKCS #11 support using GnuTLS])])
AC_ARG_ENABLE([recvmmsg],
AS_HELP_STRING([--enable-recvmmsg=auto|yes|no], [enable recvmmsg() network API [default=auto]]),
[], [enable_recvmmsg=auto])
AS_CASE([$enable_recvmmsg],
[auto|yes],[
AC_CHECK_FUNC([recvmmsg],
[AC_CHECK_FUNC([sendmmsg],[enable_recvmmsg=yes],[enable_recvmmsg=no])],
[enable_recvmmsg=no])],
[no],[],
[*], [AC_MSG_ERROR([Invalid value of --enable-recvmmsg.]
)])
AS_IF([test "$enable_recvmmsg" = yes],[
AC_DEFINE([ENABLE_RECVMMSG], [1], [Use recvmmsg().])])
# XDP support
AC_ARG_ENABLE([xdp],
AS_HELP_STRING([--enable-xdp=auto|yes|no], [enable eXpress Data Path [default=auto]]),
[], [enable_xdp=auto])
PKG_CHECK_MODULES([libbpf], [libbpf],
[save_LIBS=$LIBS
LIBS="$LIBS $libbpf_LIBS"
AC_CHECK_FUNC([bpf_object__find_map_by_offset], [libbpf1=no], [libbpf1=yes])
LIBS=$save_LIBS
have_libbpf=yes],
[have_libbpf=no]
)
AS_CASE([$enable_xdp],
[auto], [AS_IF([test "$have_libbpf" = "yes"], [enable_xdp=yes], [enable_xdp=no])],
[yes], [AS_IF([test "$have_libbpf" = "yes"], [enable_xdp=yes], [AC_MSG_ERROR([libbpf not available])])],
[no], [],
[*], [AC_MSG_ERROR([Invalid value of --enable-xdp.])]
)
AM_CONDITIONAL([ENABLE_XDP], [test "$enable_xdp" != "no"])
AS_IF([test "$enable_xdp" = "yes"], [
PKG_CHECK_MODULES([libxdp], [libxdp], [enable_xdp=libxdp], [enable_xdp=yes])
AS_IF([test "$enable_xdp" = "libxdp"],
[AC_DEFINE([USE_LIBXDP], [1], [Use libxdp.])
libbpf_CFLAGS="$libbpf_CFLAGS $libxdp_CFLAGS"
libbpf_LIBS="$libbpf_LIBS $libxdp_LIBS"],
[AS_IF([test "$libbpf1" = "yes"], [AC_MSG_ERROR([libxdp not available])])]
)]
)
AC_SUBST([libbpf_CFLAGS])
AC_SUBST([libbpf_LIBS])
AS_IF([test "$enable_xdp" != "no"],[
AC_DEFINE([ENABLE_XDP], [1], [Use eXpress Data Path.])])
# Reuseport support
AS_CASE([$host_os],
[freebsd*], [reuseport_opt=SO_REUSEPORT_LB],
[*], [reuseport_opt=SO_REUSEPORT],
)
AC_ARG_ENABLE([reuseport],
AS_HELP_STRING([--enable-reuseport=auto|yes|no],
[enable SO_REUSEPORT(_LB) support [default=auto]]),
[], [enable_reuseport=auto]
)
AS_CASE([$enable_reuseport],
[auto], [
AS_CASE([$host_os],
[freebsd*|linux*], [AC_CHECK_DECL([$reuseport_opt],
[enable_reuseport=yes],
[enable_reuseport=no],
[#include <sys/socket.h>
])],
[*], [enable_reuseport=no]
)],
[yes], [AC_CHECK_DECL([$reuseport_opt], [],
[AC_MSG_ERROR([SO_REUSEPORT(_LB) not supported.])],
[#include <sys/socket.h>
])],
[no], [],
[*], [AC_MSG_ERROR([Invalid value of --enable-reuseport.])]
)
AS_IF([test "$enable_reuseport" = yes],[
AC_DEFINE([ENABLE_REUSEPORT], [1], [Use SO_REUSEPORT(_LB).])])
# Redis zone backend support
AC_ARG_ENABLE([redis],
AS_HELP_STRING([--enable-redis=auto|yes|client|module|no], [enable Redis support [default=auto]]),
[], [enable_redis=auto])
redis_dir="${libdir}/knot/redis"
AC_ARG_WITH([redisdir],
AS_HELP_STRING([--with-redisdir=path], [Destination of module for Redis [default=${libdir}/knot/redis]]),
[redis_dir=$withval])
AC_SUBST(redis_dir)
AS_CASE([$enable_redis],
[auto], [PKG_CHECK_MODULES([hiredis], [hiredis], [enable_redis=yes], [enable_redis=no])],
[yes], [PKG_CHECK_MODULES([hiredis], [hiredis], [enable_redis=yes], [AC_MSG_ERROR([libhiredis not available])])],
[client], [PKG_CHECK_MODULES([hiredis], [hiredis], [enable_redis=client], [AC_MSG_ERROR([libhiredis not available])])],
[module], [AS_IF([test "$enable_shared" = "yes"], [enable_redis=module], [AC_MSG_ERROR([link mode has to be 'shared'])])],
[no], [],
[*], [AC_MSG_ERROR([Invalid value of --enable-redis.])]
)
AM_CONDITIONAL([ENABLE_REDIS], [test "$enable_redis" != "no"])
AM_CONDITIONAL([ENABLE_REDIS_MODULE], [test "$enable_redis" != "no" && test "$enable_redis" != "client" && test "$enable_shared" = "yes"])
AS_IF([test "$enable_redis" = yes -o "$enable_redis" = client],[
AC_DEFINE([ENABLE_REDIS], [1], [Enable Redis support.])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <hiredis/hiredis.h>
#if (HIREDIS_MAJOR < 1) || (HIREDIS_MAJOR == 1 && HIREDIS_MINOR < 1)
#error "No TLS support in Redis (need >= 1.1.0)"
#endif]])],
[AC_DEFINE([ENABLE_REDIS_TLS], [1], [Enable Redis TLS support.])],
[enable_redis="yes (no TLS)"])
AS_IF([test "$enable_redis" = yes && test "$enable_shared" = yes],[
enable_redis="${enable_redis} module"
])
])
#########################################
# Dependencies needed for Knot DNS daemon
#########################################
# Systemd integration
AC_ARG_ENABLE([systemd],
AS_HELP_STRING([--enable-systemd=auto|yes|no], [enable systemd integration [default=auto]]),
[enable_systemd="$enableval"], [enable_systemd=auto])
AC_ARG_ENABLE([dbus],
AS_HELP_STRING([--enable-dbus=auto|systemd|libdbus|no], [enable D-bus support [default=auto]]),
[enable_dbus="$enableval"], [enable_dbus=auto])
AS_IF([test "$enable_daemon" = "yes"],[
AS_IF([test "$enable_systemd" != "no"],[
AS_CASE([$enable_systemd],
[auto],[PKG_CHECK_MODULES([systemd], [libsystemd], [enable_systemd=yes], [
PKG_CHECK_MODULES([systemd], [libsystemd-daemon libsystemd-journal], [enable_systemd=yes], [enable_systemd=no])])],
[yes],[PKG_CHECK_MODULES([systemd], [libsystemd], [], [
PKG_CHECK_MODULES([systemd], [libsystemd-daemon libsystemd-journal])])],
[*],[AC_MSG_ERROR([Invalid value of --enable-systemd.])])
])
AS_IF([test "$enable_systemd" = "yes"],[
AC_DEFINE([ENABLE_SYSTEMD], [1], [Use systemd integration.])])
AS_IF([test "$enable_dbus" != "no"],[
AS_CASE([$enable_dbus],
[auto],[AS_IF([test "$enable_systemd" = "yes"],
[AC_DEFINE([ENABLE_DBUS_SYSTEMD], [1], [systemd D-Bus available])
enable_dbus=systemd],
[PKG_CHECK_MODULES([libdbus], [dbus-1],
[AC_DEFINE([ENABLE_DBUS_LIBDBUS], [1], [libdbus D-Bus available])
enable_dbus=libdbus],
[enable_dbus=no])])],
[systemd],[AS_IF([test "$enable_systemd" = "yes"],
[AC_DEFINE([ENABLE_DBUS_SYSTEMD], [1], [systemd D-Bus available])
enable_dbus=systemd],
[AC_MSG_ERROR([systemd >= 221 not available.])])],
[libdbus],[PKG_CHECK_MODULES([libdbus], [dbus-1],
[AC_DEFINE([ENABLE_DBUS_LIBDBUS], [1], [libdbus D-Bus available])
enable_dbus=libdbus],
[AC_MSG_ERROR([libdbus not available.])])],
[no],[enable_dbus=no],
[*],[AC_MSG_ERROR([Invalid value of --enable-dbus.])])
])
]) dnl enable_daemon
# Socket polling method
socket_polling=
AC_ARG_WITH([socket-polling],
AS_HELP_STRING([--with-socket-polling=auto|poll|epoll|kqueue|libkqueue],
[Use specific socket polling method [default=auto]]),
[socket_polling=$withval], [socket_polling=auto]
)
AS_CASE([$socket_polling],
[auto], [AC_CHECK_FUNCS([kqueue],
[AC_DEFINE([HAVE_KQUEUE], [1], [kqueue available])
socket_polling=kqueue],
[AC_CHECK_FUNCS([epoll_create],
[AC_DEFINE([HAVE_EPOLL], [1], [epoll available])
socket_polling=epoll],
[socket_polling=poll])])],
[poll], [socket_polling=poll],
[epoll], [AC_CHECK_FUNCS([epoll_create],
[AC_DEFINE([HAVE_EPOLL], [1], [epoll available])
socket_polling=epoll],
[AC_MSG_ERROR([epoll not available.])])],
[kqueue], [AC_CHECK_FUNCS([kqueue],
[AC_DEFINE([HAVE_KQUEUE], [1], [kqueue available])
socket_polling=kqueue],
[AC_MSG_ERROR([kqueue not available.])])],
[libkqueue], [PKG_CHECK_MODULES([libkqueue], [libkqueue],
[AC_DEFINE([HAVE_KQUEUE], [1], [libkqueue available])
socket_polling=libkqueue],
[AC_MSG_ERROR([libkqueue not available.])])],
[*], [AC_MSG_ERROR([Invalid value of --socket-polling.])]
)
# Alternative memory allocator
malloc_LIBS=
AC_ARG_WITH([memory-allocator],
AS_HELP_STRING([--with-memory-allocator=auto|LIBRARY],
[Use specific memory allocator for the server (e.g. jemalloc) [default=auto]]),
AS_CASE([$withval],
[auto], [],
[*], [malloc_LIBS="-l$withval"]
)
with_memory_allocator=[$withval]
)
AS_IF([test "$with_memory_allocator" = ""], [with_memory_allocator="auto"])
AC_SUBST([malloc_LIBS])
AS_IF([test "$enable_daemon" = "yes"],[
PKG_CHECK_MODULES([liburcu], [liburcu], [], [
AC_MSG_ERROR([liburcu not found])
])
])
static_modules=""
shared_modules=""
static_modules_declars=""
static_modules_init=""
doc_modules=""
KNOT_MODULE([alias], "yes", "non-shareable")
KNOT_MODULE([authsignal], "yes")
KNOT_MODULE([cookies], "yes")
KNOT_MODULE([dnserr], "yes")
KNOT_MODULE([dnsproxy], "yes", "non-shareable")
KNOT_MODULE([dnstap], "no")
KNOT_MODULE([geoip], "yes")
KNOT_MODULE([noudp], "yes")
KNOT_MODULE([onlinesign], "yes", "non-shareable")
KNOT_MODULE([probe], "yes")
KNOT_MODULE([queryacl], "yes")
KNOT_MODULE([rrl], "yes")
KNOT_MODULE([stats], "yes")
KNOT_MODULE([synthrecord], "yes")
KNOT_MODULE([whoami], "yes")
AC_SUBST([STATIC_MODULES_DECLARS], [$(printf "$static_modules_declars")])
AM_SUBST_NOTMAKE([STATIC_MODULES_DECLARS])
AC_SUBST([STATIC_MODULES_INIT], [$(printf "$static_modules_init")])
AM_SUBST_NOTMAKE([STATIC_MODULES_INIT])
AC_SUBST([DOC_MODULES], [$(printf "$doc_modules")])
AM_SUBST_NOTMAKE([DOC_MODULES])
# Check for Dnstap
AC_ARG_ENABLE([dnstap],
AS_HELP_STRING([--enable-dnstap], [Enable dnstap support for kdig (requires fstrm, protobuf-c)]),
[], [enable_dnstap=no])
AS_IF([test "$enable_dnstap" != "no" -o "$STATIC_MODULE_dnstap" != "no" -o "$SHARED_MODULE_dnstap" != "no"],[
AC_PATH_PROG([PROTOC_C], [protoc])
AS_IF([test -z "$PROTOC_C"],[
AC_PATH_PROG([PROTOC_C], [protoc-c])
])
AS_IF([test -z "$PROTOC_C"],[
AC_MSG_ERROR([Neither protoc nor protoc-c found. Install protobuf-compiler and protobuf-c-compiler])
])
PKG_CHECK_MODULES([libfstrm], [libfstrm])
PKG_CHECK_MODULES([libprotobuf_c], [libprotobuf-c >= 1.0.0])
AC_SUBST([DNSTAP_CFLAGS], ["$libfstrm_CFLAGS $libprotobuf_c_CFLAGS"])
AC_SUBST([DNSTAP_LIBS], ["$libfstrm_LIBS $libprotobuf_c_LIBS"])
])
AS_IF([test "$enable_dnstap" != "no"],[
AC_DEFINE([USE_DNSTAP], [1], [Define to 1 to enable dnstap support for kdig])
])
AM_CONDITIONAL([HAVE_DNSTAP], test "$enable_dnstap" != "no")
AM_CONDITIONAL([HAVE_LIBDNSTAP], test "$enable_dnstap" != "no" -o \
"$STATIC_MODULE_dnstap" != "no" -o \
"$SHARED_MODULE_dnstap" != "no")
# MaxMind DB for the GeoIP module
AC_ARG_ENABLE([maxminddb],
AS_HELP_STRING([--enable-maxminddb=auto|yes|no], [enable MaxMind DB [default=auto]]),
[enable_maxminddb="$enableval"], [enable_maxminddb=auto])
AS_IF([test "$enable_daemon" = "no"],[enable_maxminddb=no])
AS_CASE([$enable_maxminddb],
[no],[],
[auto],[PKG_CHECK_MODULES([libmaxminddb], [libmaxminddb], [enable_maxminddb=yes], [enable_maxminddb=no])],
[yes], [PKG_CHECK_MODULES([libmaxminddb], [libmaxminddb])],
[*],[
save_CFLAGS="$CFLAGS"
save_LIBS="$LIBS"
AS_IF([test "$enable_maxminddb" != ""],[
LIBS="$LIBS -L$enable_maxminddb"
CFLAGS="$CFLAGS -I$enable_maxminddb/include"
])
AC_SEARCH_LIBS([MMDB_open], [maxminddb], [
AS_IF([test "$enable_maxminddb" != ""], [
libmaxminddb_CFLAGS="-I$enable_maxminddb/include"
libmaxminddb_LIBS="-L$enable_maxminddb -lmaxminddb"
],[
libmaxminddb_CFLAGS=""
libmaxminddb_LIBS="$ac_cv_search_MMDB_open"
])
],[AC_MSG_ERROR("not found in `$enable_maxminddb'")])
CFLAGS="$save_CFLAGS"
LIBS="$save_LIBS"
AC_SUBST([libmaxminddb_CFLAGS])
AC_SUBST([libmaxminddb_LIBS])
enable_maxminddb=yes
])
AS_IF([test "$enable_maxminddb" = yes], [AC_DEFINE([HAVE_MAXMINDDB], [1], [Define to 1 to enable MaxMind DB.])])
AM_CONDITIONAL([HAVE_MAXMINDDB], [test "$enable_maxminddb" = yes])
AC_ARG_WITH([lmdb],
[AS_HELP_STRING([--with-lmdb=DIR], [explicit location where to find LMDB])]
)
PKG_CHECK_MODULES([lmdb], [lmdb >= 0.9.15], [], [
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
have_lmdb=no
for try_lmdb in "$with_lmdb" "" "/usr/local" "/usr/pkg"; do
AS_IF([test -d "$try_lmdb"], [
lmdb_CFLAGS="-I$try_lmdb/include"
lmdb_LIBS="-L$try_lmdb/lib"
],[
lmdb_CFLAGS=""
lmdb_LIBS=""
])
CPPFLAGS="$save_CPPFLAGS $lmdb_CFLAGS"
LIBS="$save_LIBS $lmdb_LIBS"
AC_SEARCH_LIBS([mdb_txn_id], [lmdb], [
have_lmdb=yes
lmdb_LIBS="$lmdb_LIBS -llmdb"
AC_SUBST([lmdb_CFLAGS])
AC_SUBST([lmdb_LIBS])
break
])
# do not cache result of AC_SEARCH_LIBS test
unset ac_cv_search_mdb_txn_id
done
CPPFLAGS="$save_CPPFLAGS"
LIBS="$save_LIBS"
AS_IF([test "$have_lmdb" = "no" && test "$enable_redis" != "module"], [
AC_MSG_ERROR([lmdb library not found])
])
])
# LMDB mapping sizes
conf_mapsize_default=500
AC_ARG_WITH([conf_mapsize],
AS_HELP_STRING([--with-conf-mapsize=NUM], [Configuration DB mapsize in MiB [default=$conf_mapsize_default]]),
[conf_mapsize=$withval],[conf_mapsize=$conf_mapsize_default])
AS_CASE([$conf_mapsize],
[yes],[conf_mapsize=$conf_mapsize_default],
[no], [AC_MSG_ERROR([conf_mapsize must be a number])],
[*], [AS_IF([test $conf_mapsize != $(( $conf_mapsize + 0 ))],
[AC_MSG_ERROR(conf_mapsize must be an integer number)])])
AC_DEFINE_UNQUOTED([CONF_MAPSIZE], [$conf_mapsize], [Configuration DB mapsize.])
AC_SUBST(conf_mapsize)
# libedit
AS_IF([test "$enable_daemon" = "yes" -o "$enable_utilities" = "yes"], [
PKG_CHECK_MODULES([libedit], [libedit], [with_libedit=yes], [
with_libedit=no
AC_CHECK_HEADER([histedit.h], [
# workaround for OpenBSD
AS_CASE([$host_os],
[openbsd*], [libedit_deps=-lcurses],
[libedit_deps=]
)
AC_CHECK_LIB([edit], [el_init], [
with_libedit=yes
libedit_CFLAGS=
libedit_LIBS="-ledit $libedit_deps"
], [], [$libedit_deps]
)
])
])
AS_IF([test "$with_libedit" != "yes"], [
AC_MSG_ERROR([libedit not found])
])
], [
with_libedit=no
libedit_CFLAGS=
libedit_LIBS=
])
# QUIC support
AC_ARG_ENABLE([quic],
AS_HELP_STRING([--enable-quic=auto|yes|no|embedded], [Support DoQ (needs libngtcp2 >= 0.17.0, gnutls >= 3.7.3) [default=auto]]),
[], [enable_quic=auto])
AS_CASE([$enable_quic],
[auto], [PKG_CHECK_MODULES([libngtcp2], [libngtcp2 >= 0.17.0 libngtcp2_crypto_gnutls], [enable_quic=yes], [enable_quic=no])],
[yes], [PKG_CHECK_MODULES([libngtcp2], [libngtcp2 >= 0.17.0 libngtcp2_crypto_gnutls], [enable_quic=yes],
AS_IF([test "$gnutls_quic" = "yes"],
[enable_quic=embedded
embedded_libngtcp2_CFLAGS="-I\$(top_srcdir)/src/contrib/libngtcp2 -I\$(top_srcdir)/src/contrib/libngtcp2/ngtcp2/lib"
embedded_libngtcp2_LIBS=$libelf_LIBS
libngtcp2_CFLAGS="-I\$(top_srcdir)/src/contrib/libngtcp2"],
[enable_quic=no
AC_MSG_WARN([gnutls >= 3.7.3 is required for QUIC])]))],
[embedded], [enable_quic=embedded
embedded_libngtcp2_CFLAGS="-I\$(top_srcdir)/src/contrib/libngtcp2 -I\$(top_srcdir)/src/contrib/libngtcp2/ngtcp2/lib"
embedded_libngtcp2_LIBS=$libelf_LIBS
libngtcp2_CFLAGS="-I\$(top_srcdir)/src/contrib/libngtcp2"],
[no], [],
[*], [AC_MSG_ERROR([Invalid value of --enable-quic.])]
)
AM_CONDITIONAL([EMBEDDED_LIBNGTCP2], [test "$enable_quic" = "embedded"])
AM_CONDITIONAL([ENABLE_QUIC], [test "$enable_quic" != "no"])
AC_SUBST([embedded_libngtcp2_CFLAGS])
AC_SUBST([embedded_libngtcp2_LIBS])
AC_SUBST([libngtcp2_CFLAGS])
AC_SUBST([libngtcp2_LIBS])
AS_IF([test "$enable_quic" != "no"], [
AC_DEFINE([ENABLE_QUIC], [1], [Define to 1 to enable DoQ support using libngtcp2 and GnuTLS])])
############################################
# Dependencies needed for Knot DNS utilities
############################################
dnl Check for libidn2.
AC_ARG_WITH(libidn,
AS_HELP_STRING([--with-libidn=[DIR]], [Support IDN (needs GNU libidn2)]),
with_libidn=$withval,
with_libidn=yes
)
dnl Check for libnghttp2.
AC_ARG_WITH(libnghttp2,
AS_HELP_STRING([--with-libnghttp2=[DIR]], [Support DoH (needs libnghttp2)]),
with_libnghttp2=$withval,
with_libnghttp2=yes
)
dnl DNSSEC validation in kdig
AC_ARG_ENABLE([kdig-validation],
AS_HELP_STRING([--disable-kdig-validation], [Disable DNSSEC validation in kdig]),
[], [enable_kdig_validation=yes])
AS_IF([test "$enable_kdig_validation" != "yes" -o "$enable_utilities" != "yes" -o "$enable_daemon" != "yes"], [
enable_kdig_validation=no
])
AS_IF([test "$enable_kdig_validation" = "yes"], [
AC_DEFINE([HAVE_KDIG_VALIDATION], [1], [Define to 1 to enable DNSSEC validation in kdig.])
])
AM_CONDITIONAL([HAVE_KDIG_VALIDATION], [test "$enable_kdig_validation" = "yes"])
AS_IF([test "$enable_utilities" = "yes"], [
AS_IF([test "$with_libidn" != "no"], [
PKG_CHECK_MODULES([libidn2], [libidn2 >= 2.0.0], [
with_libidn=libidn2
AC_DEFINE([LIBIDN], [1], [Define to 1 to enable IDN support])
], [
with_libidn=no
AC_MSG_WARN([libidn2 not found])
])
])
AS_IF([test "$with_libnghttp2" != "no"], [
PKG_CHECK_MODULES([libnghttp2], [libnghttp2], [
with_libnghttp2=libnghttp2
AC_DEFINE([LIBNGHTTP2], [1], [Define to 1 to enable DoH support])
], [
with_libnghttp2=no
AC_MSG_WARN([libnghttp2 not found])
])
])
AS_IF([test "$enable_xdp" != "no"], [
PKG_CHECK_MODULES([libmnl], [libmnl], [], [
AC_MSG_ERROR([libmnl not found])
])
])
]) # Knot DNS utilities dependencies
AC_ARG_ENABLE([cap-ng],
AS_HELP_STRING([--enable-cap-ng=auto|no], [enable POSIX capabilities [default=auto]]),
[enable_cap_ng="$enableval"], [enable_cap_ng=auto])
AS_IF([test "$enable_daemon" = "yes"], [
AS_IF([test "$enable_cap_ng" != "no"],[
PKG_CHECK_MODULES([cap_ng], [cap-ng], [enable_cap_ng=yes], [
enable_cap_ng=no
AC_CHECK_HEADER([cap-ng.h], [
save_LIBS="$LIBS"
AC_SEARCH_LIBS([capng_apply], [cap-ng], [
AS_IF([test "$ac_cv_search_capng_apply" != "none required"],
[cap_ng_LIBS="$ac_cv_search_capng_apply"], [cap_ng_LIBS=])
AC_SUBST([cap_ng_LIBS])
enable_cap_ng=yes
])
LIBS="$save_LIBS"
])
])
], [
enable_cap_ng=no
cap_ng_LIBS=
])])
AS_IF([test "$enable_cap_ng" = yes],
[AC_DEFINE([ENABLE_CAP_NG], [1], [POSIX capabilities available])]
)
save_LIBS="$LIBS"
AC_SEARCH_LIBS([pthread_create], [pthread], [
AS_IF([test "$ac_cv_search_pthread_create" != "none required"],
[pthread_LIBS="$ac_cv_search_pthread_create"], [pthread_LIBS=])
AC_SUBST([pthread_LIBS])
],[
AC_MSG_ERROR([pthreads not found])
])
LIBS="$save_LIBS"
save_LIBS="$LIBS"
AC_SEARCH_LIBS([dlopen], [dl], [
AS_IF([test "$ac_cv_search_dlopen" != "none required"],
[dlopen_LIBS="$ac_cv_search_dlopen"], [dlopen_LIBS=])
AC_SUBST([dlopen_LIBS])
],[
AC_MSG_ERROR([dlopen not found])
])
LIBS="$save_LIBS"
save_LIBS="$LIBS"
AC_SEARCH_LIBS([pow], [m], [
AS_IF([test "$ac_cv_search_pow" != "none required"],
[math_LIBS="$ac_cv_search_pow"], [math_LIBS=])
AC_SUBST([math_LIBS])
],[
AC_MSG_ERROR([math not found])
])
LIBS="$save_LIBS"
save_LIBS="$LIBS"
AC_SEARCH_LIBS([pthread_setaffinity_np], [pthread], [
AC_DEFINE([HAVE_PTHREAD_SETAFFINITY_NP], [1],
[Define to 1 if you have the pthread_setaffinity_np function.])
])
LIBS="$save_LIBS"
# Checks for header files.
AC_HEADER_RESOLV
AC_CHECK_HEADERS_ONCE([pthread_np.h sys/uio.h bsd/string.h])
# Checks for optional library functions.
AC_CHECK_FUNCS([accept4 fgetln getline initgroups malloc_trim \
setgroups strlcat strlcpy sysctlbyname])
# Check for robust memory cleanup implementations.
AC_CHECK_FUNC([explicit_bzero], [
AC_DEFINE([HAVE_EXPLICIT_BZERO], [1], [explicit_bzero available])
explicit_bzero=yes], [explicit_bzero=no]
)
AC_CHECK_FUNC([explicit_memset], [
AC_DEFINE([HAVE_EXPLICIT_MEMSET], [1], [explicit_memset available])
explicit_memset=yes], [explicit_memset=no]
)
AM_CONDITIONAL([USE_GNUTLS_MEMSET], [test "$explicit_bzero" = "no" -a "$explicit_memset" = "no"])
# Check for mandatory library functions.
AC_CHECK_FUNC([vasprintf], [], [
AC_MSG_ERROR([vasprintf support in the libc is required])])
# Check for cpu_set_t/cpuset_t compatibility
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [[cpu_set_t set; CPU_ZERO(&set);]])],
[AC_DEFINE(HAVE_CPUSET_LINUX, 1, [Define if Linux-like cpu_set_t exists.])])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread_np.h>]], [[cpuset_t set; CPU_ZERO(&set);]])],
[AC_DEFINE(HAVE_CPUSET_BSD, 1, [Define if FreeBSD-like cpuset_t exists.])])
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <sched.h>]], [[cpuset_t* set = cpuset_create(); cpuset_destroy(set);]])],
[AC_DEFINE(HAVE_CPUSET_NETBSD, 1, [Define if cpuset_t and cpuset(3) exists.])])
# Check for C11 compiler builtin atomic functions.
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#if (__STDC_VERSION__ < 201112L) || defined(__STDC_NO_ATOMICS__)
#error "No C11 atomics"
#endif
#include <stdatomic.h>]],
[[atomic_uint_fast64_t val = 0;
atomic_fetch_add_explicit(&val, 1, memory_order_relaxed);]])],
[AC_DEFINE(HAVE_C11_ATOMIC, 1, [Define to 1 if you have C11 'atomic' functions.])
atomic_type="C11"],
[atomic_type="none"]
)
# Prepare CFLAG_VISIBILITY to be used where needed
gl_VISIBILITY()
# Add code coverage macro
AX_CODE_COVERAGE
AX_SANITIZER
AS_IF([test -n "$sanitizer_CFLAGS"], [CFLAGS="$CFLAGS $sanitizer_CFLAGS"])
AM_CONDITIONAL([FUZZER], [test "$with_fuzzer" != "no"])
AM_CONDITIONAL([OSS_FUZZ], [test "$with_oss_fuzz" != "no"])
# Strip -fdebug-prefix-map= parameters from flags for better reproducibility of binaries.
filtered_cflags=$(echo -n "$CFLAGS" | \
sed 's/[[^[:alnum:]]]-f[[^[:space:]]]*-prefix-map=[[^[:space:]]]*//g')
filtered_cppflags=$(echo -n "$CPPFLAGS" | \
sed 's/[[^[:alnum:]]]-f[[^[:space:]]]*-prefix-map=[[^[:space:]]]*//g')
filtered_config_params=$(echo -n "$ac_configure_args" | \
sed 's/[[^[:alnum:]]]-f[[^[:space:]]]*-prefix-map=[[^[:space:]]]*//g')
result_msg_base="
Target: $host_os $host_cpu $endianity
Compiler: ${CC}
CFLAGS: ${filtered_cflags} ${filtered_cppflags}
LIBS: ${LIBS} ${LDFLAGS}
LibURCU: ${liburcu_LIBS} ${liburcu_CFLAGS}
GnuTLS: ${gnutls_LIBS} ${gnutls_CFLAGS}
Libedit: ${libedit_LIBS} ${libedit_CFLAGS}
LMDB: ${lmdb_LIBS} ${lmdb_CFLAGS}
Config: ${conf_mapsize} MiB default mapsize
Prefix: ${knot_prefix}
Run dir: ${run_dir}
Storage dir: ${storage_dir}
Config dir: ${config_dir}
Module dir: ${module_dir}
Redis dir: ${redis_dir}
Static modules: ${static_modules}
Shared modules: ${shared_modules}
Knot DNS libraries: ${link_mode}
Knot DNS daemon: ${enable_daemon}
Knot DNS utilities: ${enable_utilities}
Knot DNS documentation: ${enable_documentation}
Use recvmmsg: ${enable_recvmmsg}
Use SO_REUSEPORT(_LB): ${enable_reuseport}
XDP support: ${enable_xdp}
DoQ support: ${enable_quic}
Redis support: ${enable_redis}
Socket polling: ${socket_polling}
Atomic support: ${atomic_type}
Memory allocator: ${with_memory_allocator}
Fast zone parser: ${enable_fastparser}
Utilities with IDN: ${with_libidn}
Utilities with DoH: ${with_libnghttp2}
Utilities with Dnstap: ${enable_dnstap}
Kdig DNSSEC validation: ${enable_kdig_validation}
MaxMind DB support: ${enable_maxminddb}
Systemd integration: ${enable_systemd}
D-Bus support: ${enable_dbus}
POSIX capabilities: ${enable_cap_ng}
PKCS #11 support: ${enable_pkcs11}
Code coverage: ${enable_code_coverage}
Sanitizer: ${with_sanitizer}
LibFuzzer: ${with_fuzzer}
OSS-Fuzz: ${with_oss_fuzz}"
result_msg_esc=$(echo -n " Configure:$filtered_config_params\n$result_msg_base" | sed '$!s/$/\\n/' | tr -d '\n')
AC_DEFINE_UNQUOTED([CONFIGURE_SUMMARY],["$result_msg_esc"],[Configure summary])
AC_CONFIG_FILES([Makefile
Doxyfile
doc/Makefile
tests/Makefile
tests-fuzz/Makefile
tests-redis/Makefile
samples/Makefile
distro/Makefile
python/Makefile
python/knot_exporter/Makefile
python/knot_exporter/pyproject.toml
python/knot_exporter/setup.py
python/libknot/Makefile
python/libknot/pyproject.toml
python/libknot/setup.py
python/libknot/libknot/__init__.py
src/Makefile
src/redis/Makefile
src/libknot/xdp/Makefile
src/knot/modules/static_modules.h
])
AC_CONFIG_FILES([doc/modules.rst],
[cp doc/modules.rst "${srcdir}"/doc/modules.rst 2>/dev/null
abs_srcdir=$(cd "${srcdir}" && pwd)
ln -s -f "${abs_srcdir}"/src/knot/modules "${srcdir}"/doc 2>/dev/null])
AC_OUTPUT
AC_MSG_RESULT([
Knot DNS $VERSION
$result_msg_base
])
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