dnl  OpenVPN -- An application to securely tunnel IP networksdnl             over a single UDP port, with support for TLS-baseddnl             session authentication and key exchange,dnl             packet encryption, packet authentication, anddnl             packet compression.dnldnl  Copyright (C) 2002 James Yonan <jim@yonan.net>dnldnl  This program is free software; you can redistribute it and/or modifydnl  it under the terms of the GNU General Public License as published bydnl  the Free Software Foundation; either version 2 of the License, ordnl  (at your option) any later version.dnldnl  This program is distributed in the hope that it will be useful,dnl  but WITHOUT ANY WARRANTY; without even the implied warranty ofdnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See thednl  GNU General Public License for more details.dnldnl  You should have received a copy of the GNU General Public Licensednl  along with this program (see the file COPYING included with thisdnl  distribution); if not, write to the Free Software Foundation, Inc.,dnl  59 Temple Place, Suite 330, Boston, MA  02111-1307  USAdnl Process this file with autoconf to produce a configure script.AC_PREREQ(2.50)AC_INIT([OpenVPN], [1.3.2], [openvpn-users@lists.sourceforge.net], [openvpn])AM_CONFIG_HEADER(config.h)AC_ARG_ENABLE(lzo,   [  --disable-lzo           Do not compile LZO compression support],   [LZO="$enableval"],   [LZO="yes"])AC_ARG_ENABLE(crypto,   [  --disable-crypto        Do not compile OpenSSL crypto support],   [CRYPTO="$enableval"],   [CRYPTO="yes"])AC_ARG_ENABLE(ssl,   [  --disable-ssl           Do not compile OpenSSL SSL support for TLS-based key exchange],   [SSL="$enableval"],   [SSL="yes"])AC_ARG_ENABLE(pthread,   [  --enable-pthread        Compile pthread support for improved SSL/TLS latency],   [PTHREAD="$enableval"],   [PTHREAD="no"])AC_ARG_ENABLE(strict,   [  --enable-strict         Enable strict compiler warnings],   [STRICT="$enableval"],   [STRICT="no"])AC_ARG_WITH(ssl-headers,   [  --with-ssl-headers=DIR  Crypto/SSL Include files location],   [CS_HDR_DIR="$withval"]   [CPPFLAGS="$CPPFLAGS -I$withval"] )AC_ARG_WITH(ssl-lib,   [  --with-ssl-lib=DIR      Crypto/SSL Library location],   [LIBS="$LIBS -L$withval"] )AC_ARG_WITH(lzo-headers,   [  --with-lzo-headers=DIR  LZO Include files location],   [LZO_HDR_DIR="$withval"]   [CPPFLAGS="$CPPFLAGS -I$withval"] )AC_ARG_WITH(lzo-lib,   [  --with-lzo-lib=DIR      LZO Library location],   [LIBS="$LIBS -L$withval"] )AC_ARG_WITH(ifconfig-path,   [  --with-ifconfig-path=PATH   Path to ifconfig tool],   [IFCONFIG="$withval"],   [AC_PATH_PROG([IFCONFIG], [ifconfig], [ifconfig], [$PATH:/usr/local/sbin:/usr/sbin:/sbin])])AC_DEFINE_UNQUOTED(IFCONFIG_PATH, "$IFCONFIG", [Path to ifconfig tool])AC_ARG_WITH(leak-check,   [  --with-leak-check=TYPE  Build with memory leak checking, TYPE = dmalloc or ssl],   [LEAK="$withval"])dnl Guess host type.AC_CANONICAL_HOSTAC_CANONICAL_SYSTEMAM_INIT_AUTOMAKE(openvpn, [$PACKAGE_VERSION])dnl check target OSopenvpn_target=$targetif test $target_alias; then  openvpn_target=$target_aliasfiAC_DEFINE_UNQUOTED(TARGET_ALIAS, "$openvpn_target", [A string representing our target])case "$target" in*linux*)	AC_DEFINE(TARGET_LINUX, 1, [Are we running on Linux?])	;;*solaris*)	AC_DEFINE(TARGET_SOLARIS, 1, [Are we running on Solaris?])	;;*openbsd*)	AC_DEFINE(TARGET_OPENBSD, 1, [Are we running on OpenBSD?])	;;*freebsd*)	AC_DEFINE(TARGET_FREEBSD, 1, [Are we running on FreeBSD?])	;;*netbsd*)	AC_DEFINE(TARGET_NETBSD, 1, [Are we running NetBSD?])	;;*darwin*)	dnl some Mac OS X tendering (we use vararg macros...)	AC_DEFINE(TARGET_DARWIN, 1, [Are we running on Mac OS X?])	CPPFLAGS="$CPPFLAGS -no-cpp-precomp"	;;esacdnl Checks for programs.AC_PROG_CCAC_PROG_INSTALLAC_PROG_GCC_TRADITIONALdnl Checks for header files.AC_HEADER_STDCdnl Checks for typedefs, structures, and compiler characteristics.AC_C_CONSTAC_C_INLINEAC_TYPE_PID_TAC_TYPE_SIZE_TAC_HEADER_TIMEdnl Check for more header files.AC_HEADER_SYS_WAITAC_CHECK_HEADERS(sys/time.h)AC_CHECK_HEADERS(sys/socket.h)AC_CHECK_HEADERS(sys/ioctl.h)AC_CHECK_HEADERS(sys/stat.h)AC_CHECK_HEADERS(sys/mman.h)AC_CHECK_HEADERS(fcntl.h)AC_CHECK_HEADERS(stdlib.h)AC_CHECK_HEADERS(stdint.h)AC_CHECK_HEADERS(stdarg.h)AC_CHECK_HEADERS(unistd.h)AC_CHECK_HEADERS(signal.h)AC_CHECK_HEADERS(stdio.h)AC_CHECK_HEADERS(string.h)AC_CHECK_HEADERS(strings.h)AC_CHECK_HEADERS(ctype.h)AC_CHECK_HEADERS(errno.h)AC_CHECK_HEADERS(syslog.h)AC_CHECK_HEADERS(pwd.h)AC_CHECK_HEADERS(grp.h)AC_CHECK_HEADERS(net/if_tun.h)AC_CHECK_HEADERS(net/if.h)AC_CHECK_HEADERS(stropts.h)AC_CHECK_HEADERS(sys/sockio.h)AC_CHECK_HEADERS(netinet/in.h)AC_CHECK_HEADERS(netinet/in_systm.h)AC_CHECK_HEADERS(netinet/ip.h)AC_CHECK_HEADERS(netinet/if_ether.h)AC_CHECK_HEADERS(netinet/tcp.h)AC_CHECK_HEADERS(resolv.h)AC_CHECK_HEADERS(arpa/inet.h)AC_CHECK_HEADERS(netdb.h)AC_CHECK_HEADERS(sys/uio.h)AC_CHECK_HEADERS(linux/if_tun.h)dnl check that in_addr_t is definedAC_CHECK_TYPE(	[in_addr_t],	[],	[AC_DEFINE(in_addr_t, uint32_t, [Some systems don't define in_addr_t])],	[#include "syshead.h"])dnl check for basic typesAC_CHECK_TYPE(	[uint8_t],	[],	[AC_DEFINE(uint8_t, unsigned char, [8-bit unsigned type])],	[#include "syshead.h"])AC_CHECK_TYPE(	[uint32_t],	[],	[AC_DEFINE(uint32_t, unsigned long, [32-bit unsigned type])],	[#include "syshead.h"])dnl check for other typesTYPE_SOCKLEN_TAC_TYPE_SIGNALdnl Check for libsocketAC_SEARCH_LIBS(socket, socket)dnl Check for libnslAC_SEARCH_LIBS(inet_ntoa, nsl)dnl Check for libresolvAC_SEARCH_LIBS(gethostbyname, resolv nsl)dnl optional library functionsAC_FUNC_FORKAC_CHECK_FUNCS(daemon)AC_CHECK_FUNCS(chroot)AC_CHECK_FUNCS(getpwnam)AC_CHECK_FUNCS(setuid)AC_CHECK_FUNCS(nice)AC_CHECK_FUNCS(system)AC_CHECK_FUNCS(getpid)AC_CHECK_FUNCS(dup2)AC_CHECK_FUNCS(getpass)AC_CHECK_FUNCS(strerror)AC_CHECK_FUNCS(syslog)AC_CHECK_FUNCS(openlog)AC_CHECK_FUNCS(mlockall)AC_CHECK_FUNCS(getgrnam)AC_CHECK_FUNCS(setgid)AC_CHECK_FUNCS(setgroups)AC_CHECK_FUNCS(stat)dnl Required library functionsAC_FUNC_MEMCMPAC_FUNC_MALLOCAC_CHECK_FUNCS(gettimeofday select socket gethostbyname inet_ntoa memset vsnprintf, [],	[AC_MSG_ERROR([Required library function not found])])dnldnl check librariesdnlif test "$PTHREAD" = "yes"; then   AC_CHECKING([for pthread support])   ACX_PTHREAD(	[	    case "$target" in	    *openbsd*)		AC_MSG_RESULT([WARNING: pthread support on OpenBSD is unstable!])		CFLAGS="$CFLAGS -pthread"		;;	    esac	    LIBS="$PTHREAD_LIBS $LIBS"	    CFLAGS="$CFLAGS $PTHREAD_CFLAGS"	    CC="$PTHREAD_CC"	    AC_DEFINE(USE_PTHREAD, 1, [Use pthread-based multithreading])	],	[	    AC_MSG_RESULT([I don't know how to build with pthread support on this platform.])	    AC_MSG_ERROR([try ./configure --disable-pthread])	])fiif test "$LEAK" = "dmalloc"; then   AC_CHECKING([for dmalloc Library and Header files])   AC_CHECK_HEADER(dmalloc.h,         [AC_CHECK_LIB(dmalloc, malloc,	    [               if test "$PTHREAD" = "yes"; then                   OPENVPN_ADD_LIBS(-ldmallocth)               else                   OPENVPN_ADD_LIBS(-ldmalloc)               fi	       AC_DEFINE(DMALLOC, 1, [Use dmalloc memory debugging library])	    ],	    [AC_MSG_ERROR([dmalloc library not found.])]	)],        [AC_MSG_ERROR([dmalloc headers not found.])]   )fiif test "$LZO" = "yes"; then   AC_CHECKING([for LZO Library and Header files])   AC_CHECK_HEADER(lzo1x.h,         [AC_CHECK_LIB(lzo, lzo1x_1_15_compress,	    [	       OPENVPN_ADD_LIBS(-llzo)	       AC_DEFINE(USE_LZO, 1, [Use LZO compression library])	    ],	    [AC_MSG_ERROR([LZO headers were found but LZO library was not found.])]	)],	[          AC_MSG_RESULT([LZO library and headers not found.])	  AC_MSG_RESULT([LZO library available from http://www.oberhumer.com/opensource/lzo/])	  AC_MSG_ERROR([Or try ./configure --disable-lzo])	]   )fiif test "$CRYPTO" = "yes"; then   AC_CHECKING([for OpenSSL Crypto Library and Header files])   AC_CHECK_HEADER(openssl/evp.h,	[AC_CHECK_LIB(crypto, EVP_CIPHER_CTX_init,            [		   AC_CHECKING([that OpenSSL Library is at least version 0.9.5])		   AC_EGREP_CPP(yes,		     [		       #include "openssl/evp.h"		       #if SSLEAY_VERSION_NUMBER >= 0x00905000L		         yes		       #endif		     ],		     [                       AC_DEFINE(USE_CRYPTO, 1, [Use OpenSSL crypto library])                       OPENVPN_ADD_LIBS(-lcrypto)                       AC_CHECK_FUNCS(EVP_CIPHER_CTX_set_key_length)                     ],		     [AC_MSG_ERROR([OpenSSL crypto Library is too old.])]		   )	    ],	    [AC_MSG_ERROR([OpenSSL Crypto library not found.])]	)],	[AC_MSG_ERROR([OpenSSL Crypto headers not found.])]   )   if test "$SSL" = "yes"; then      AC_CHECKING([for OpenSSL SSL Library and Header files])      AC_CHECK_HEADER(openssl/ssl.h,	   [AC_CHECK_LIB(ssl, SSL_CTX_new,	       [                  if test "$LEAK" = "ssl"; then                     AC_CHECKING([for Memory Debugging Capabilities in OpenSSL Library])                     AC_CHECK_LIB(ssl, CRYPTO_mem_ctrl,                         [                             AC_DEFINE(CRYPTO_MDEBUG, 1, [Use memory debugging function in OpenSSL])			     AC_MSG_RESULT([NOTE: OpenSSL library must be compiled with CRYPTO_MDEBUG])                         ],                         [AC_MSG_ERROR([Memory Debugging function in OpenSSL library not found.])]                     )                  fi	       ],	       [AC_MSG_ERROR([OpenSSL SSL library not found.])]	   )],	   [AC_MSG_ERROR([OpenSSL SSL headers not found.])]      )      AC_DEFINE(USE_SSL, 1, [Use OpenSSL SSL library])      OPENVPN_ADD_LIBS(-lssl)   fifidnl enable strict compiler warningsif test "$STRICT" = "yes"; then   CFLAGS="$CFLAGS -Wall -W -Wpointer-arith -Wsign-compare -Winline"fiAC_OUTPUT(Makefile)