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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) 2002-2021 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 Initialize automake. automake < 1.12 didn't have serial-tests and
dnl gives an error if it sees this, but for automake >= 1.13
dnl serial-tests is required so we have to include it. Solution is to
dnl test for the version of automake (by running an external command)
dnl and provide it if necessary. Note we have to do this entirely using
dnl m4 macros since automake queries this macro by running
dnl 'autoconf --trace ...'.
m4_define([serial_tests], [
m4_esyscmd([automake --version |
head -1 |
awk '{split ($NF,a,"."); if (a[1] == 1 && a[2] >= 12) { print "serial-tests" }}'
])
])
# This foreign option prevents autoreconf from overriding our COPYING and
# INSTALL targets:
AM_INIT_AUTOMAKE(foreign serial_tests 1.9) dnl NB: Do not [quote] this parameter.
AC_CANONICAL_HOST
AC_USE_SYSTEM_EXTENSIONS
AC_ARG_ENABLE(
[lzo],
[AS_HELP_STRING([--disable-lzo], [disable LZO compression support @<:@default=yes@:>@])],
,
[enable_lzo="yes"]
)
AC_ARG_ENABLE(lz4,
[ --disable-lz4 Disable LZ4 compression support],
[enable_lz4="$enableval"],
[enable_lz4="yes"]
)
AC_ARG_ENABLE(comp-stub,
[ --enable-comp-stub Don't compile compression support but still allow limited interoperability with compression-enabled peers],
[enable_comp_stub="$enableval"],
[enable_comp_stub="no"]
)
AC_ARG_ENABLE(
[ofb-cfb],
[AS_HELP_STRING([--disable-ofb-cfb], [disable support for OFB and CFB cipher modes @<:@default=yes@:>@])],
,
[enable_crypto_ofb_cfb="yes"]
)
AC_ARG_ENABLE(
[x509-alt-username],
[AS_HELP_STRING([--enable-x509-alt-username], [enable the --x509-username-field feature @<:@default=no@:>@])],
,
[enable_x509_alt_username="no"]
)
AC_ARG_ENABLE(
[plugins],
[AS_HELP_STRING([--disable-plugins], [disable plug-in support @<:@default=yes@:>@])],
,
[enable_plugins="yes"]
)
AC_ARG_ENABLE(
[management],
[AS_HELP_STRING([--disable-management], [disable management server support @<:@default=yes@:>@])],
,
[enable_management="yes"]
)
AC_ARG_ENABLE(
[pkcs11],
[AS_HELP_STRING([--enable-pkcs11], [enable pkcs11 support @<:@default=no@:>@])],
,
[enable_pkcs11="no"]
)
AC_ARG_ENABLE(
[fragment],
[AS_HELP_STRING([--disable-fragment], [disable internal fragmentation support (--fragment) @<:@default=yes@:>@])],
,
[enable_fragment="yes"]
)
AC_ARG_ENABLE(
[port-share],
[AS_HELP_STRING([--disable-port-share], [disable TCP server port-share support (--port-share) @<:@default=yes@:>@])],
,
[enable_port_share="yes"]
)
AC_ARG_ENABLE(
[debug],
[AS_HELP_STRING([--disable-debug], [disable debugging support (disable gremlin and verb 7+ messages) @<:@default=yes@:>@])],
,
[enable_debug="yes"]
)
AC_ARG_ENABLE(
[small],
[AS_HELP_STRING([--enable-small], [enable smaller executable size (disable OCC, usage message, and verb 4 parm list) @<:@default=no@:>@])],
,
[enable_small="no"]
)
AC_ARG_ENABLE(
[iproute2],
[AS_HELP_STRING([--enable-iproute2], [enable support for iproute2 @<:@default=no@:>@])],
,
[enable_iproute2="no"]
)
AC_ARG_ENABLE(
[plugin-auth-pam],
[AS_HELP_STRING([--disable-plugin-auth-pam], [disable auth-pam plugin @<:@default=platform specific@:>@])],
,
[
case "$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 "$host" in
*-*-linux*)
AC_DEFINE([TARGET_LINUX], [1], [Are we running on Linux?])
AM_CONDITIONAL([TARGET_LINUX], [true])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["L"], [Target prefix])
have_sitnl="yes"
;;
*-*-solaris*)
AC_DEFINE([TARGET_SOLARIS], [1], [Are we running on Solaris?])
AC_DEFINE_UNQUOTED([TARGET_PREFIX], ["S"], [Target prefix])
CPPFLAGS="$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_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
PKG_PROG_PKG_CONFIG
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 "${RST2HTML}"])
# Set -std=c99 unless user already specified a -std=
case "${CFLAGS}" in
*-std=*) ;;
*) CFLAGS="${CFLAGS} -std=c99" ;;
esac
#
# Libtool
#
ifdef(
[LT_INIT],
[
LT_INIT([win32-dll])
LT_LANG([Windows Resource])
],
[
AC_LIBTOOL_WIN32_DLL
AC_LIBTOOL_RC
AC_PROG_LIBTOOL
]
)
AC_C_CONST
AC_C_INLINE
AC_C_VOLATILE
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_TYPE_SIGNAL
AX_TYPE_SOCKLEN_T
AC_CHECK_SIZEOF([unsigned int])
AC_CHECK_SIZEOF([unsigned long])
AC_CHECK_HEADERS([ \
fcntl.h io.h \
sys/types.h sys/socket.h \
unistd.h dlfcn.h \
netinet/in.h netinet/in_systm.h \
netinet/tcp.h arpa/inet.h netdb.h \
versionhelpers.h \
])
AC_CHECK_HEADERS([ \
sys/time.h sys/ioctl.h sys/stat.h \
sys/mman.h sys/file.h sys/wait.h \
unistd.h libgen.h stropts.h \
syslog.h pwd.h grp.h termios.h \
sys/sockio.h sys/uio.h linux/sockios.h \
linux/types.h poll.h sys/epoll.h err.h \
])
SOCKET_INCLUDES="
#include <stdlib.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _WIN32
#include <windows.h>
#endif
#ifdef _WIN32
#include <winsock2.h>
#endif
#ifdef _WIN32
#include <ws2tcpip.h>
#endif
#ifdef HAVE_NETINET_IN_SYSTM_H
#include <netinet/in_systm.h>
#endif
#ifdef HAVE_NETINET_IP_H
#include <netinet/ip.h>
#endif
"
AC_CHECK_HEADERS(
[net/if.h netinet/ip.h resolv.h sys/un.h net/if_utun.h sys/kern_control.h],
,
,
[[${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])],
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECK_TYPE(
[struct sock_extended_err],
[AC_DEFINE([HAVE_SOCK_EXTENDED_ERR], [1], [struct sock_extended_err needed for extended socket error support])],
,
[[${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],
,
,
[[${SOCKET_INCLUDES}]]
)
AC_CHECKING([anonymous union support])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
struct mystruct {
union {
int m1;
char m2;
};
};
]],
[[
struct mystruct s;
s.m1 = 1; s.m2 = 2;
]]
)],
[
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_ANONYMOUS_UNION_SUPPORT], [], [Compiler supports anonymous unions])
],
[AC_MSG_RESULT([no])]
)
saved_LDFLAGS="$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 readv writev 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="${LIBS} -ldmalloc"
AC_DEFINE(
[DMALLOC],
[1],
[Use dmalloc memory debugging library]
)
],
[AC_MSG_ERROR([dmalloc library not found.])]
)],
[AC_MSG_ERROR([dmalloc headers not found.])]
)
;;
ssl)
AC_CHECK_LIB(
[ssl],
[CRYPTO_mem_ctrl],
[
AC_DEFINE(
[CRYPTO_MDEBUG],
[1],
[Use memory debugging function in OpenSSL]
)
AC_MSG_NOTICE([NOTE: OpenSSL library must be compiled with CRYPTO_MDEBUG])
],
[AC_MSG_ERROR([Memory Debugging function in OpenSSL library not found.])]
)
;;
esac
PKG_CHECK_MODULES(
[PKCS11_HELPER],
[libpkcs11-helper-1 >= 1.11],
[have_pkcs11_helper="yes"],
[]
)
if test "${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 >= 1.0.2],
[have_openssl="yes"],
[] # 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 >= 1.0.2])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <openssl/opensslv.h>
]],
[[
/* Version encoding: MNNFFPPS - see opensslv.h for details */
#if OPENSSL_VERSION_NUMBER < 0x10002000L
#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 "${with_openssl_engine}" = "auto"; then
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <openssl/opensslv.h>
]],
[[
/* Version encoding: MNNFFPPS - see opensslv.h for details */
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
#error Engine supported disabled by default in OpenSSL 3.0+
#endif
]]
)],
[have_openssl_engine="yes"],
[have_openssl_engine="no"]
)
if test "${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 "${have_openssl_engine}" = "yes"; then
AC_DEFINE([HAVE_OPENSSL_ENGINE], [1], [OpenSSL engine support available])
fi
AC_CHECK_FUNC(
[EVP_aes_256_gcm],
,
[AC_MSG_ERROR([OpenSSL check for AES-256-GCM support failed])]
)
# All supported OpenSSL version (>= 1.0.2)
# have this feature
have_export_keying_material="yes"
CFLAGS="${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}"
if test -z "${MBEDTLS_CFLAGS}" -a -z "${MBEDTLS_LIBS}"; then
# if the user did not explicitly specify flags, try to autodetect
LIBS="${LIBS} -lmbedtls -lmbedx509 -lmbedcrypto"
AC_CHECK_LIB(
[mbedtls],
[mbedtls_ssl_init],
[MBEDTLS_LIBS="-lmbedtls -lmbedx509 -lmbedcrypto"],
[AC_MSG_ERROR([Could not find mbed TLS.])],
[${PKCS11_HELPER_LIBS}]
)
fi
CFLAGS="${MBEDTLS_CFLAGS} ${PKCS11_HELPER_CFLAGS} ${CFLAGS}"
LIBS="${MBEDTLS_LIBS} ${PKCS11_HELPER_LIBS} ${LIBS}"
AC_MSG_CHECKING([mbedtls version])
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <mbedtls/version.h>
]],
[[
#if MBEDTLS_VERSION_NUMBER < 0x02000000 || MBEDTLS_VERSION_NUMBER >= 0x03000000
#error invalid version
#endif
]]
)],
[AC_MSG_RESULT([ok])],
[AC_MSG_ERROR([mbed TLS 2.y.z required])]
)
AC_CHECK_FUNCS(
[ \
mbedtls_cipher_write_tag \
mbedtls_cipher_check_tag \
],
,
[AC_MSG_ERROR([mbed TLS check for AEAD support failed])]
)
have_export_keying_material="yes"
AC_CHECK_FUNC(
[mbedtls_ssl_conf_export_keys_ext_cb],
,
[have_export_keying_material="no"]
)
AC_CHECK_FUNC(
[mbedtls_ctr_drbg_update_ret],
AC_DEFINE([HAVE_CTR_DRBG_UPDATE_RET], [1],
[Use mbedtls_ctr_drbg_update_ret from mbed TLS]),
)
CFLAGS="${saved_CFLAGS}"
LIBS="${saved_LIBS}"
AC_DEFINE([ENABLE_CRYPTO_MBEDTLS], [1], [Use mbed TLS library])
CRYPTO_CFLAGS="${MBEDTLS_CFLAGS}"
CRYPTO_LIBS="${MBEDTLS_LIBS}"
elif test "${with_crypto_library}" = "wolfssl"; then
AC_ARG_VAR([WOLFSSL_CFLAGS], [C compiler flags for wolfssl. The include directory should
contain the regular wolfSSL header files but also the
wolfSSL OpenSSL header files. Ex: -I/usr/local/include
-I/usr/local/include/wolfssl])
AC_ARG_VAR([WOLFSSL_LIBS], [linker flags for wolfssl])
saved_CFLAGS="${CFLAGS}"
saved_LIBS="${LIBS}"
if test -z "${WOLFSSL_CFLAGS}" -a -z "${WOLFSSL_LIBS}"; then
# if the user did not explicitly specify flags, try to autodetect
PKG_CHECK_MODULES(
[WOLFSSL],
[wolfssl],
[],
[AC_MSG_ERROR([Could not find wolfSSL.])]
)
PKG_CHECK_VAR(
[WOLFSSL_INCLUDEDIR],
[wolfssl],
[includedir],
[],
[AC_MSG_ERROR([Could not find wolfSSL includedir variable.])]
)
WOLFSSL_CFLAGS="${WOLFSSL_CFLAGS} -I${WOLFSSL_INCLUDEDIR}/wolfssl"
fi
saved_CFLAGS="${CFLAGS}"
saved_LIBS="${LIBS}"
CFLAGS="${CFLAGS} ${WOLFSSL_CFLAGS}"
LIBS="${LIBS} ${WOLFSSL_LIBS}"
AC_CHECK_LIB(
[wolfssl],
[wolfSSL_Init],
[],
[AC_MSG_ERROR([Could not link wolfSSL library.])]
)
AC_CHECK_HEADER([wolfssl/options.h],,[AC_MSG_ERROR([wolfSSL header wolfssl/options.h not found!])])
# wolfSSL signal EKM support
have_export_keying_material="yes"
if test "${enable_wolfssl_options_h}" = "yes"; then
AC_DEFINE([EXTERNAL_OPTS_OPENVPN], [1], [Include options.h from wolfSSL library])
else
AC_DEFINE([WOLFSSL_USER_SETTINGS], [1], [Use custom user_settings.h file for wolfSSL library])
fi
have_export_keying_material="yes"
CFLAGS="${saved_CFLAGS}"
LIBS="${saved_LIBS}"
AC_DEFINE([ENABLE_CRYPTO_WOLFSSL], [1], [Use wolfSSL crypto library])
AC_DEFINE([ENABLE_CRYPTO_OPENSSL], [1], [Use wolfSSL openssl compatibility layer])
CRYPTO_CFLAGS="${WOLFSSL_CFLAGS}"
CRYPTO_LIBS="${WOLFSSL_LIBS}"
else
AC_MSG_ERROR([Invalid crypto library: ${with_crypto_library}])
fi