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configure.ac
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configure.ac
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dnl OpenVPN -- An application to securely tunnel IP networks
dnl over a single UDP port, with support for SSL/TLS-based
dnl session authentication and key exchange,
dnl packet encryption, packet authentication, and
dnl packet compression.
dnl
dnl Copyright (C) 2002-2024 OpenVPN Inc <sales@openvpn.net>
dnl Copyright (C) 2006-2012 Alon Bar-Lev <alon.barlev@gmail.com>
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License along
dnl with this program; if not, write to the Free Software Foundation, Inc.,
dnl 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
dnl Process this file with autoconf to produce a configure script.
AC_PREREQ(2.59)
m4_include(version.m4)
AC_INIT([PRODUCT_NAME], [PRODUCT_VERSION], [PRODUCT_BUGREPORT], [PRODUCT_TARNAME])
m4_include(compat.m4)
AC_DEFINE([OPENVPN_VERSION_RESOURCE], [PRODUCT_VERSION_RESOURCE], [Version in windows resource format])
AC_SUBST([OPENVPN_VERSION_MAJOR], [PRODUCT_VERSION_MAJOR], [OpenVPN major version])
AC_SUBST([OPENVPN_VERSION_MINOR], [PRODUCT_VERSION_MINOR], [OpenVPN minor version])
AC_SUBST([OPENVPN_VERSION_PATCH], [PRODUCT_VERSION_PATCH], [OpenVPN patch level - may be a string or integer])
AC_DEFINE([OPENVPN_VERSION_MAJOR], [PRODUCT_VERSION_MAJOR], [OpenVPN major version - integer])
AC_DEFINE([OPENVPN_VERSION_MINOR], [PRODUCT_VERSION_MINOR], [OpenVPN minor version - integer])
AC_DEFINE([OPENVPN_VERSION_PATCH], ["PRODUCT_VERSION_PATCH"], [OpenVPN patch level - may be a string or integer])
AC_CONFIG_AUX_DIR([.])
AC_CONFIG_HEADERS([config.h include/openvpn-plugin.h])
AC_CONFIG_SRCDIR([src/openvpn/syshead.h])
AC_CONFIG_MACRO_DIR([m4])
dnl Automake 1.14+ warns if sources are in sub-directories but subdir-objects
dnl options is not enabled. However, automake before 1.15a has a bug that causes
dnl variable expansion to fail in foo_SOURCES when this option is used.
dnl As most of our build systems are now likely to use automake 1.16+ add a
dnl work around to conditionally add subdir-objects option.
m4_define([subdir_objects], [
m4_esyscmd([automake --version |
head -1 |
awk '{split ($NF,a,"."); if (a[1] == 1 && a[2] >= 16) { print "subdir-objects" }}'
])
])
# This foreign option prevents autoreconf from overriding our COPYING and
# INSTALL targets:
AM_INIT_AUTOMAKE(foreign subdir_objects 1.9) dnl NB: Do not [quote] this parameter.
AM_SILENT_RULES([yes])
AC_CANONICAL_HOST
AC_USE_SYSTEM_EXTENSIONS
AC_ARG_ENABLE(
[lzo],
[AS_HELP_STRING([--disable-lzo], [disable LZO compression support @<:@default=yes@:>@])],
,
[enable_lzo="yes"]
)
AC_ARG_ENABLE(
[lz4],
[AS_HELP_STRING([--disable-lz4], [disable LZ4 compression support @<:@default=yes@:>@])],
[enable_lz4="$enableval"],
[enable_lz4="yes"]
)
AC_ARG_ENABLE(
[comp-stub],
[AS_HELP_STRING([--enable-comp-stub], [disable compression support but still allow limited interoperability with compression-enabled peers @<:@default=no@:>@])],
[enable_comp_stub="$enableval"],
[enable_comp_stub="no"]
)
AC_ARG_ENABLE(
[ofb-cfb],
[AS_HELP_STRING([--disable-ofb-cfb], [disable support for OFB and CFB cipher modes @<:@default=yes@:>@])],
,
[enable_crypto_ofb_cfb="yes"]
)
AC_ARG_ENABLE(
[x509-alt-username],
[AS_HELP_STRING([--enable-x509-alt-username], [enable the --x509-username-field feature @<:@default=no@:>@])],
,
[enable_x509_alt_username="no"]
)
AC_ARG_ENABLE(
[ntlm],
[AS_HELP_STRING([--disable-ntlm], [disable NTLMv2 proxy support @<:@default=yes@:>@])],
,
[enable_ntlm="yes"]
)
AC_ARG_ENABLE(
[plugins],
[AS_HELP_STRING([--disable-plugins], [disable plug-in support @<:@default=yes@:>@])],
,
[enable_plugins="yes"]
)
AC_ARG_ENABLE(
[management],
[AS_HELP_STRING([--disable-management], [disable management server support @<:@default=yes@:>@])],
,
[enable_management="yes"]
)
AC_ARG_ENABLE(
[pkcs11],
[AS_HELP_STRING([--enable-pkcs11], [enable pkcs11 support @<:@default=no@:>@])],
,
[enable_pkcs11="no"]
)
AC_ARG_ENABLE(
[fragment],
[AS_HELP_STRING([--disable-fragment], [disable internal fragmentation support (--fragment) @<:@default=yes@:>@])],
,
[enable_fragment="yes"]
)
AC_ARG_ENABLE(
[port-share],
[AS_HELP_STRING([--disable-port-share], [disable TCP server port-share support (--port-share) @<:@default=yes@:>@])],
,
[enable_port_share="yes"]
)
AC_ARG_ENABLE(
[debug],
[AS_HELP_STRING([--disable-debug], [disable debugging support (disable gremlin and verb 7+ messages) @<:@default=yes@:>@])],
,
[enable_debug="yes"]
)
AC_ARG_ENABLE(
[small],
[AS_HELP_STRING([--enable-small], [enable smaller executable size (disable OCC, usage message, and verb 4 parm list) @<:@default=no@:>@])],
,
[enable_small="no"]
)
AC_ARG_ENABLE(
[dco],
[AS_HELP_STRING([--disable-dco], [disable data channel offload support using the ovpn-dco kernel module @<:@default=yes@:>@ on Linux/FreeBSD, can't disable on Windows])],
,
[
case "$host" in
*-*-linux*)
enable_dco="auto"
;;
*-*-freebsd*)
enable_dco="auto"
;;
*)
# note that this does not disable it for Windows
enable_dco="no"
;;
esac
]
)
AC_ARG_ENABLE(
[iproute2],
[AS_HELP_STRING([--enable-iproute2], [enable support for iproute2 (disables DCO) @<:@default=no@:>@])],
,
[enable_iproute2="no"]
)
AC_ARG_ENABLE(
[plugin-auth-pam],
[AS_HELP_STRING([--disable-plugin-auth-pam], [disable auth-pam plugin @<:@default=platform specific@:>@])],
,
[
case "$host" in
*-*-openbsd*) enable_plugin_auth_pam="no";;
*-mingw*) enable_plugin_auth_pam="no";;
*) enable_plugin_auth_pam="yes";;
esac
]
)
AC_ARG_ENABLE(
[plugin-down-root],
[AS_HELP_STRING([--disable-plugin-down-root], [disable down-root plugin @<:@default=platform specific@:>@])],
,
[
case "$host" in
*-mingw*) enable_plugin_down_root="no";;
*) enable_plugin_down_root="yes";;
esac
]
)
AC_ARG_ENABLE(
[pam-dlopen],
[AS_HELP_STRING([--enable-pam-dlopen], [dlopen libpam @<:@default=no@:>@])],
,
[enable_pam_dlopen="no"]
)
AC_ARG_ENABLE(
[strict],
[AS_HELP_STRING([--enable-strict], [enable strict compiler warnings (debugging option) @<:@default=no@:>@])],
,
[enable_strict="no"]
)
AC_ARG_ENABLE(
[pedantic],
[AS_HELP_STRING([--enable-pedantic], [enable pedantic compiler warnings, will not generate a working executable (debugging option) @<:@default=no@:>@])],
,
[enable_pedantic="no"]
)
AC_ARG_ENABLE(
[werror],
[AS_HELP_STRING([--enable-werror], [promote compiler warnings to errors, will cause builds to fail if the compiler issues warnings (debugging option) @<:@default=no@:>@])],
,
[enable_werror="no"]
)
AC_ARG_ENABLE(
[strict-options],
[AS_HELP_STRING([--enable-strict-options], [enable strict options check between peers (debugging option) @<:@default=no@:>@])],
,
[enable_strict_options="no"]
)
AC_ARG_ENABLE(
[selinux],
[AS_HELP_STRING([--enable-selinux], [enable SELinux support @<:@default=no@:>@])],
,
[enable_selinux="no"]
)
AC_ARG_ENABLE(
[systemd],
[AS_HELP_STRING([--enable-systemd], [enable systemd support @<:@default=no@:>@])],
,
[enable_systemd="no"]
)
AC_ARG_ENABLE(
[async-push],
[AS_HELP_STRING([--enable-async-push], [enable async-push support for plugins providing deferred authentication @<:@default=no@:>@])],
,
[enable_async_push="no"]
)
AC_ARG_WITH(
[special-build],
[AS_HELP_STRING([--with-special-build=STRING], [specify special build string])],
[test -n "${withval}" && AC_DEFINE_UNQUOTED([CONFIGURE_SPECIAL_BUILD], ["${withval}"], [special build string])]
)
AC_ARG_WITH(
[mem-check],
[AS_HELP_STRING([--with-mem-check=TYPE], [build with debug memory checking, TYPE=no|dmalloc|valgrind|ssl @<:@default=no@:>@])],
[
case "${withval}" in
dmalloc|valgrind|ssl|no) ;;
*) AC_MSG_ERROR([bad value ${withval} for --mem-check]) ;;
esac
],
[with_mem_check="no"]
)
AC_ARG_WITH(
[crypto-library],
[AS_HELP_STRING([--with-crypto-library=library], [build with the given crypto library, TYPE=openssl|mbedtls|wolfssl @<:@default=openssl@:>@])],
[
case "${withval}" in
openssl|mbedtls|wolfssl) ;;
*) AC_MSG_ERROR([bad value ${withval} for --with-crypto-library]) ;;
esac
],
[with_crypto_library="openssl"]
)
AC_ARG_ENABLE(
[wolfssl-options-h],
[AS_HELP_STRING([--disable-wolfssl-options-h], [Disable including options.h in wolfSSL @<:@default=yes@:>@])],
,
[enable_wolfssl_options_h="yes"]
)
AC_ARG_WITH(
[openssl-engine],
[AS_HELP_STRING([--with-openssl-engine], [enable engine support with OpenSSL. Default enabled for OpenSSL < 3.0, auto,yes,no @<:@default=auto@:>@])],
[
case "${withval}" in
auto|yes|no) ;;
*) AC_MSG_ERROR([bad value ${withval} for --with-engine]) ;;
esac
],
[with_openssl_engine="auto"]
)
AC_ARG_VAR([PLUGINDIR], [Path of plug-in directory @<:@default=LIBDIR/openvpn/plugins@:>@])
if test -n "${PLUGINDIR}"; then
plugindir="${PLUGINDIR}"
else
plugindir="\${libdir}/openvpn/plugins"
fi
AC_DEFINE_UNQUOTED([TARGET_ALIAS], ["${host}"], [A string representing our host])
AM_CONDITIONAL([TARGET_LINUX], [false])
case "$host" in
*-*-linux*)
AC_DEFINE([TARGET_LINUX], [1], [Are we running on Linux?])
AM_CONDITIONAL([TARGET_LINUX], [true])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["L"], [Target prefix])
have_sitnl="yes"
pkg_config_required="yes"
;;
*-*-solaris*)
AC_DEFINE([TARGET_SOLARIS], [1], [Are we running on Solaris?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["S"], [Target prefix])
CPPFLAGS="$CPPFLAGS -D_XPG4_2"
test -x /bin/bash && SHELL="/bin/bash"
;;
*-*-openbsd*)
AC_DEFINE([TARGET_OPENBSD], [1], [Are we running on OpenBSD?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["O"], [Target prefix])
;;
*-*-freebsd*)
AC_DEFINE([TARGET_FREEBSD], [1], [Are we running on FreeBSD?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["F"], [Target prefix])
;;
*-*-netbsd*)
AC_DEFINE([TARGET_NETBSD], [1], [Are we running NetBSD?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["N"], [Target prefix])
;;
*-*-darwin*)
AC_DEFINE([TARGET_DARWIN], [1], [Are we running on Mac OS X?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["M"], [Target prefix])
have_tap_header="yes"
ac_cv_type_struct_in_pktinfo=no
;;
*-mingw*)
AC_DEFINE([TARGET_WIN32], [1], [Are we running WIN32?])
AC_DEFINE([ENABLE_DCO], [1], [DCO is always enabled on Windows])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["W"], [Target prefix])
CPPFLAGS="${CPPFLAGS} -DWIN32_LEAN_AND_MEAN"
CPPFLAGS="${CPPFLAGS} -DNTDDI_VERSION=NTDDI_VISTA -D_WIN32_WINNT=_WIN32_WINNT_VISTA"
WIN32=yes
;;
*-*-dragonfly*)
AC_DEFINE([TARGET_DRAGONFLY], [1], [Are we running on DragonFlyBSD?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["D"], [Target prefix])
;;
*-aix*)
AC_DEFINE([TARGET_AIX], [1], [Are we running AIX?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["A"], [Target prefix])
ROUTE="/usr/sbin/route"
have_tap_header="yes"
ac_cv_header_net_if_h="no" # exists, but breaks things
;;
*)
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["X"], [Target prefix])
have_tap_header="yes"
;;
esac
AM_CONDITIONAL([CROSS_COMPILING], test "${cross_compiling}" = "yes")
PKG_PROG_PKG_CONFIG
# Add variable to print if pkg-config is found or not. Users often miss that
if test "${PKG_CONFIG}" = ""; then
if test "${pkg_config_required}" = "yes"; then
AC_MSG_ERROR([pkg-config is required])
fi
pkg_config_found="(not found)"
else
pkg_config_found="(${PKG_CONFIG})"
fi
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_SED
AC_PROG_MAKE_SET
AC_ARG_VAR([IFCONFIG], [full path to ipconfig utility])
AC_ARG_VAR([ROUTE], [full path to route utility])
AC_ARG_VAR([IPROUTE], [full path to ip utility])
AC_ARG_VAR([NETSTAT], [path to netstat utility]) # tests
AC_ARG_VAR([GIT], [path to git utility])
AC_ARG_VAR([SYSTEMD_ASK_PASSWORD], [path to systemd-ask-password utility])
AC_ARG_VAR([SYSTEMD_UNIT_DIR], [Path of systemd unit directory @<:@default=LIBDIR/systemd/system@:>@])
AC_ARG_VAR([TMPFILES_DIR], [Path of tmpfiles directory @<:@default=LIBDIR/tmpfiles.d@:>@])
AC_PATH_PROGS([IFCONFIG], [ifconfig],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
AC_PATH_PROGS([ROUTE], [route],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
AC_PATH_PROGS([IPROUTE], [ip],, [$PATH:/usr/local/sbin:/usr/sbin:/sbin])
AC_PATH_PROGS([SYSTEMD_ASK_PASSWORD], [systemd-ask-password],, [$PATH:/usr/local/bin:/usr/bin:/bin])
AC_CHECK_PROGS([NETSTAT], [netstat], [netstat], [$PATH:/usr/local/sbin:/usr/sbin:/sbin:/etc]) # tests
AC_CHECK_PROGS([GIT], [git]) # optional
AC_DEFINE_UNQUOTED([IFCONFIG_PATH], ["$IFCONFIG"], [Path to ifconfig tool])
AC_DEFINE_UNQUOTED([IPROUTE_PATH], ["$IPROUTE"], [Path to iproute tool])
AC_DEFINE_UNQUOTED([ROUTE_PATH], ["$ROUTE"], [Path to route tool])
AC_DEFINE_UNQUOTED([SYSTEMD_ASK_PASSWORD_PATH], ["$SYSTEMD_ASK_PASSWORD"], [Path to systemd-ask-password tool])
#
# man page generation - based on python-docutils
#
AC_ARG_VAR([RST2MAN], [path to rst2man utility])
AC_ARG_VAR([RST2HTML], [path to rst2html utility])
AC_CHECK_PROGS([RST2MAN], [rst2man rst2man.py])
AC_CHECK_PROGS([RST2HTML], [rst2html rst2html.py])
AM_CONDITIONAL([HAVE_PYDOCUTILS], [test "${RST2MAN}" -a "${RST2HTML}"])
# Set -std=c11 unless user already specified a -std=
case "${CFLAGS}" in
*-std=*) ;;
*) CFLAGS="${CFLAGS} -std=c11" ;;
esac
#
# Libtool
#
ifdef(
[LT_INIT],
[
LT_INIT([win32-dll])
LT_LANG([Windows Resource])
],
[
AC_LIBTOOL_WIN32_DLL
AC_LIBTOOL_RC
AC_PROG_LIBTOOL
]
)
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AX_TYPE_SOCKLEN_T
AC_CHECK_SIZEOF([unsigned int])
AC_CHECK_SIZEOF([unsigned long])
AC_CHECK_HEADERS([ \
fcntl.h io.h \
sys/types.h sys/socket.h \
unistd.h dlfcn.h \
netinet/in.h \
netinet/tcp.h arpa/inet.h netdb.h \
])
AC_CHECK_HEADERS([ \
sys/time.h sys/ioctl.h sys/stat.h \
sys/mman.h sys/file.h sys/wait.h \
unistd.h libgen.h stropts.h \
syslog.h pwd.h grp.h termios.h \
sys/sockio.h sys/uio.h linux/sockios.h \
linux/types.h linux/errqueue.h poll.h sys/epoll.h err.h \
])
SOCKET_INCLUDES="
#include <stdlib.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _WIN32
#include <windows.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#endif
#ifdef _WIN32
#include <ws2tcpip.h>
#endif
#ifdef HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif
"
AC_CHECK_HEADERS(
[net/if.h netinet/ip.h resolv.h sys/un.h net/if_utun.h sys/kern_control.h],
,
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPES(
[in_addr_t],
,
[AC_DEFINE([in_addr_t], [uint32_t], [Workaround missing in_addr_t])],
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPES(
[in_port_t],
,
[AC_DEFINE([in_port_t], [uint16_t], [Workaround missing in_port_t])],
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct iphdr],
[AC_DEFINE([HAVE_IPHDR], [1], [struct iphdr needed for IPv6 support])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct msghdr],
[AC_DEFINE([HAVE_MSGHDR], [1], [struct msghdr needed for extended socket error support])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct cmsghdr],
[AC_DEFINE([HAVE_CMSGHDR], [1], [struct cmsghdr needed for extended socket error support])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct in_pktinfo],
[AC_DEFINE([HAVE_IN_PKTINFO], [1], [struct in_pktinfo needed for IP_PKTINFO support])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[sa_family_t],
[AC_DEFINE([HAVE_SA_FAMILY_T], [1], [sa_family_t, needed to hold AF_* info])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_MEMBER(
[struct in_pktinfo.ipi_spec_dst],
[AC_DEFINE([HAVE_IPI_SPEC_DST], [1], [struct in_pktinfo.ipi_spec_dst needed for IP_PKTINFO support])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct sockaddr_in6],
,
[AC_MSG_ERROR([struct sockaddr_in6 not found, needed for ipv6 transport support.])],
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_DECLS(
[SO_MARK],
,
,
[[${SOCKET_INCLUDES}]]
)
AC_MSG_CHECKING([anonymous union support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
struct mystruct {
union {
int m1;
char m2;
};
};
]],
[[
struct mystruct s;
s.m1 = 1; s.m2 = 2;
]]
)],
[
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_ANONYMOUS_UNION_SUPPORT], [], [Compiler supports anonymous unions])
],
[AC_MSG_RESULT([no])]
)
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -Wl,--wrap=exit"
AC_MSG_CHECKING([linker supports --wrap])
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[
void exit(int);
void __real_exit(int);
void __wrap_exit(int i) {
__real_exit(i);
}
]],
[[
exit(0);
]]
)],
[
AC_MSG_RESULT([yes])
have_ld_wrap_support=yes
],
[AC_MSG_RESULT([no])],
)
LDFLAGS="$saved_LDFLAGS"
dnl We emulate signals in Windows
AC_CHECK_DECLS(
[SIGHUP],
,
[AC_DEFINE([SIGHUP], [1], [SIGHUP replacement])],
[[
#include <signal.h>
]]
)
AC_CHECK_DECLS(
[SIGINT],
,
[AC_DEFINE([SIGINT], [2], [SIGINT replacement])],
[[
#include <signal.h>
]]
)
AC_CHECK_DECLS(
[SIGUSR1],
,
[AC_DEFINE([SIGUSR1], [10], [SIGUSR1 replacement])],
[[
#include <signal.h>
]]
)
AC_CHECK_DECLS(
[SIGUSR2],
,
[AC_DEFINE([SIGUSR2], [12], [SIGUSR2 replacement])],
[[
#include <signal.h>
]]
)
AC_CHECK_DECLS(
[SIGTERM],
,
[AC_DEFINE([SIGTERM], [15], [SIGTERM replacement])],
[[
#include <signal.h>
]]
)
AC_FUNC_FORK
AC_CHECK_FUNCS([ \
daemon chroot getpwnam setuid nice system dup dup2 \
syslog openlog mlockall getrlimit getgrnam setgid \
setgroups flock time gettimeofday \
setsid chdir \
chsize ftruncate execve getpeereid basename dirname access \
epoll_create strsep \
])
AC_CHECK_LIB(
[dl],
[dlopen],
[DL_LIBS="-ldl"]
)
AC_SUBST([DL_LIBS])
AC_CHECK_LIB(
[nsl],
[inet_ntoa],
[SOCKETS_LIBS="${SOCKETS_LIBS} -lnsl"]
)
AC_CHECK_LIB(
[socket],
[socket],
[SOCKETS_LIBS="${SOCKETS_LIBS} -lsocket"]
)
AC_CHECK_LIB(
[resolv],
[gethostbyname],
[SOCKETS_LIBS="${SOCKETS_LIBS} -lresolv"]
)
AC_SUBST([SOCKETS_LIBS])
old_LIBS="${LIBS}"
LIBS="${LIBS} ${SOCKETS_LIBS}"
AC_CHECK_FUNCS([sendmsg recvmsg])
LIBS="${old_LIBS}"
# we assume res_init() always exist, but need to find out *where*...
AC_SEARCH_LIBS(__res_init, resolv bind, ,
AC_SEARCH_LIBS(res_9_init, resolv bind, ,
AC_SEARCH_LIBS(res_init, resolv bind, , )))
AC_ARG_VAR([TAP_CFLAGS], [C compiler flags for tap])
old_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} ${TAP_CFLAGS}"
AC_CHECK_HEADERS(
[ \
net/if_tun.h net/tun/if_tun.h \
linux/if_tun.h \
tap-windows.h \
],
[have_tap_header="yes"]
)
AC_CHECK_DECLS(
[TUNSETPERSIST],
[AC_DEFINE([ENABLE_FEATURE_TUN_PERSIST], [1], [We have persist tun capability])],
,
[[
#ifdef HAVE_LINUX_IF_TUN_H
#include <linux/if_tun.h>
#endif
]]
)
CFLAGS="${old_CFLAGS}"
test "${have_tap_header}" = "yes" || AC_MSG_ERROR([no tap header could be found])
AC_CHECK_LIB(
[selinux],
[setcon],
[SELINUX_LIBS="-lselinux"]
)
AC_SUBST([SELINUX_LIBS])
AC_ARG_VAR([LIBPAM_CFLAGS], [C compiler flags for libpam])
AC_ARG_VAR([LIBPAM_LIBS], [linker flags for libpam])
if test -z "${LIBPAM_LIBS}"; then
AC_CHECK_LIB(
[pam],
[pam_start],
[LIBPAM_LIBS="-lpam"]
)
fi
case "${with_mem_check}" in
valgrind)
AC_CHECK_HEADERS(
[valgrind/memcheck.h],
[
CFLAGS="${CFLAGS} -g -fno-inline"
AC_DEFINE(
[USE_VALGRIND],
[1],
[Use valgrind memory debugging library]
)
],
[AC_MSG_ERROR([valgrind headers not found.])]
)
;;
dmalloc)
AC_CHECK_HEADERS(
[dmalloc.h],
[AC_CHECK_LIB(
[dmalloc],
[malloc],
[
LIBS="${LIBS} -ldmalloc"
AC_DEFINE(
[DMALLOC],
[1],
[Use dmalloc memory debugging library]
)
],
[AC_MSG_ERROR([dmalloc library not found.])]
)],
[AC_MSG_ERROR([dmalloc headers not found.])]
)
;;
ssl)
AC_CHECK_LIB(
[ssl],
[CRYPTO_mem_ctrl],
[
AC_DEFINE(
[CRYPTO_MDEBUG],
[1],
[Use memory debugging function in OpenSSL]
)
AC_MSG_NOTICE([NOTE: OpenSSL library must be compiled with CRYPTO_MDEBUG])
],
[AC_MSG_ERROR([Memory Debugging function in OpenSSL library not found.])]
)
;;
esac
PKG_CHECK_MODULES(
[PKCS11_HELPER],
[libpkcs11-helper-1 >= 1.11],
[have_pkcs11_helper="yes"],
[]
)
if test "$enable_dco" != "no"; then
enable_dco_arg="$enable_dco"
if test "${enable_iproute2}" = "yes"; then
AC_MSG_WARN([DCO cannot be enabled when using iproute2])
enable_dco="no"
fi
case "$host" in
*-*-linux*)
if test "$enable_dco" = "no"; then
if test "$enable_dco_arg" = "auto"; then
AC_MSG_WARN([DCO support disabled])
else
AC_MSG_ERROR([DCO support can't be enabled])
fi
else
dnl
dnl Include generic netlink library used to talk to ovpn-dco
dnl
PKG_CHECK_MODULES([LIBNL_GENL],
[libnl-genl-3.0 >= 3.4.0],
[have_libnl="yes"],
[
AC_MSG_ERROR([libnl-genl-3.0 package not found or too old. Is the development package and pkg-config ${pkg_config_found} installed? Must be version 3.4.0 or newer for DCO])
]
)
CFLAGS="${CFLAGS} ${LIBNL_GENL_CFLAGS}"
LIBS="${LIBS} ${LIBNL_GENL_LIBS}"
AC_DEFINE(ENABLE_DCO, 1, [Enable shared data channel offload])
AC_MSG_NOTICE([Enabled ovpn-dco support for Linux])
fi
;;
*-*-freebsd*)
AC_CHECK_HEADERS([net/if_ovpn.h],
[
LIBS="${LIBS} -lnv"
AC_DEFINE(ENABLE_DCO, 1, [Enable data channel offload for FreeBSD])
AC_MSG_NOTICE([Enabled ovpn-dco support for FreeBSD])
],
[
enable_dco="no"
AC_MSG_WARN([DCO header not found.])
]
)
if test "$enable_dco" = "no"; then
if test "$enable_dco_arg" = "auto"; then
AC_MSG_WARN([DCO support disabled])
else
AC_MSG_ERROR([DCO support can't be enabled])
fi
fi
;;
*-mingw*)
AC_MSG_NOTICE([NOTE: --enable-dco ignored on Windows because it's always enabled])
;;
*)
AC_MSG_NOTICE([Ignoring --enable-dco on non supported platform])
;;
esac
fi
dnl
dnl Depend on libcap-ng on Linux
dnl
case "$host" in
*-*-linux*)
# We require pkg-config
PKG_CHECK_MODULES([LIBCAPNG],
[libcap-ng],
[],
[AC_MSG_ERROR([libcap-ng package not found. Is the development package and pkg-config ${pkg_config_found} installed?])]
)
AC_CHECK_HEADER([sys/prctl.h],,[AC_MSG_ERROR([sys/prctl.h not found!])])
CFLAGS="${CFLAGS} ${LIBCAPNG_CFLAGS}"
LIBS="${LIBS} ${LIBCAPNG_LIBS}"
AC_DEFINE(HAVE_LIBCAPNG, 1, [Enable libcap-ng support])
;;
esac
if test "${with_crypto_library}" = "openssl"; then
AC_ARG_VAR([OPENSSL_CFLAGS], [C compiler flags for OpenSSL])
AC_ARG_VAR([OPENSSL_LIBS], [linker flags for OpenSSL])
if test -z "${OPENSSL_CFLAGS}" -a -z "${OPENSSL_LIBS}"; then
# if the user did not explicitly specify flags, try to autodetect
PKG_CHECK_MODULES(
[OPENSSL],
[openssl >= 1.1.0],
[have_openssl="yes"],
[AC_MSG_WARN([OpenSSL not found by pkg-config ${pkg_config_found}])] # If this fails, we will do another test next
)
OPENSSL_LIBS=${OPENSSL_LIBS:--lssl -lcrypto}
fi
saved_CFLAGS="${CFLAGS}"
saved_LIBS="${LIBS}"
CFLAGS="${CFLAGS} ${OPENSSL_CFLAGS}"
LIBS="${LIBS} ${OPENSSL_LIBS}"
# If pkgconfig check failed or OPENSSL_CFLAGS/OPENSSL_LIBS env vars
# are used, check the version directly in the OpenSSL include file
if test "${have_openssl}" != "yes"; then
AC_MSG_CHECKING([additionally if OpenSSL is available and version >= 1.1.0])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <openssl/opensslv.h>
]],
[[
/* Version encoding: MNNFFPPS - see opensslv.h for details */
#if OPENSSL_VERSION_NUMBER < 0x10100000L
#error OpenSSL too old
#endif
]]
)],
[AC_MSG_RESULT([ok])],
[AC_MSG_ERROR([OpenSSL version too old])]
)
fi
AC_CHECK_FUNCS([SSL_CTX_new],
,
[AC_MSG_ERROR([openssl check failed])]
)
if test "${with_openssl_engine}" = "auto"; then
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <openssl/opensslv.h>
#include <openssl/opensslconf.h>
]],
[[
/* Version encoding: MNNFFPPS - see opensslv.h for details */
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
#error Engine support disabled by default in OpenSSL 3.0+
#endif
/* BoringSSL and LibreSSL >= 3.8.1 removed engine support */
#ifdef OPENSSL_NO_ENGINE
#error Engine support disabled in openssl/opensslconf.h
#endif
]]
)],
[have_openssl_engine="yes"],
[have_openssl_engine="no"]
)
if test "${have_openssl_engine}" = "yes"; then
AC_CHECK_FUNCS(
[ \
ENGINE_load_builtin_engines \
ENGINE_register_all_complete \
],
,
[have_openssl_engine="no"; break]
)
fi
else
have_openssl_engine="${with_openssl_engine}"
if test "${have_openssl_engine}" = "yes"; then
AC_CHECK_FUNCS(
[ \
ENGINE_load_builtin_engines \
ENGINE_register_all_complete \
],
,
[AC_MSG_ERROR([OpenSSL engine support not found])]
)
fi
fi
if test "${have_openssl_engine}" = "yes"; then
AC_DEFINE([HAVE_OPENSSL_ENGINE], [1], [OpenSSL engine support available])
fi
AC_CHECK_FUNC(
[EVP_aes_256_gcm],
,
[AC_MSG_ERROR([OpenSSL check for AES-256-GCM support failed])]
)
# All supported OpenSSL version (>= 1.1.0)
# have this feature
have_export_keying_material="yes"
CFLAGS="${saved_CFLAGS}"
LIBS="${saved_LIBS}"
AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use OpenSSL library])
CRYPTO_CFLAGS="${OPENSSL_CFLAGS}"
CRYPTO_LIBS="${OPENSSL_LIBS}"
elif test "${with_crypto_library}" = "mbedtls"; then
AC_ARG_VAR([MBEDTLS_CFLAGS], [C compiler flags for mbedtls])
AC_ARG_VAR([MBEDTLS_LIBS], [linker flags for mbedtls])
saved_CFLAGS="${CFLAGS}"
saved_LIBS="${LIBS}"