Mercurial > dropbear

view configure.ac @ 1653:76189c9ffea2

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External Public-Key Authentication API (#72) * Implemented dynamic loading of an external plug-in shared library to delegate public key authentication * Moved conditional compilation of the plugin infrastructure into the configure.ac script to be able to add -ldl to dropbear build only when the flag is enabled * Added tags file to the ignore list * Updated API to have the constructor to return function pointers in the pliugin instance. Added support for passing user name to the checkpubkey function. Added options to the session returned by the plugin and have dropbear to parse and process them * Added -rdynamic to the linker flags when EPKA is enabled * Changed the API to pass a previously created session to the checkPubKey function (created during preauth) * Added documentation to the API * Added parameter addrstring to plugin creation function * Modified the API to retrieve the auth options. Instead of having them as field of the EPKASession struct, they are stored internally (plugin-dependent) in the plugin/session and retrieved through a pointer to a function (in the session) * Changed option string to be a simple char * instead of unsigned char *
author fabriziobertocci <fabriziobertocci@gmail.com>
date Wed, 15 May 2019 09:43:57 -0400
parents c66c49ebf77d
children cc0fc5131c5c
line wrap: on
line source

#                                               -*- Autoconf -*-
# Process this file with autoconf and autoheader to produce a configure script.

# This Autoconf file was cobbled from various locations. In particular, a bunch
# of the platform checks have been taken straight from OpenSSH's configure.ac
# Huge thanks to them for dealing with the horrible platform-specifics :)

AC_PREREQ(2.59)
AC_INIT
AC_CONFIG_SRCDIR(buffer.c)

# Record which revision is being built
if test -s "`which hg`" && test -d "$srcdir/.hg"; then
	hgrev=`hg id -i -R "$srcdir"`
	AC_MSG_NOTICE([Source directory Mercurial base revision $hgrev])
fi

ORIGCFLAGS="$CFLAGS"
# Checks for programs.
AC_PROG_CC

if test -z "$LD" ; then
	LD=$CC
fi
AC_SUBST(LD)	

AC_DEFUN(DB_TRYADDCFLAGS, 
[{
		OLDFLAGS="$CFLAGS"
		TESTFLAGS="$1"
		CFLAGS="$CFLAGS $TESTFLAGS"
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDFLAGS" ]
			)
}])

# set compile flags prior to other tests
if test -z "$ORIGCFLAGS" && test "$GCC" = "yes"; then
	AC_MSG_NOTICE(No \$CFLAGS set... using "-Os -W -Wall" for GCC)
	CFLAGS="-Os -W -Wall"
fi

AC_MSG_NOTICE([Checking if compiler '$CC' supports -Wno-pointer-sign])
DB_TRYADDCFLAGS([-Wno-pointer-sign])

AC_MSG_NOTICE([Checking if compiler '$CC' supports -fno-strict-overflow])
DB_TRYADDCFLAGS([-fno-strict-overflow])

STATIC=0
AC_ARG_ENABLE(static,
	[  --enable-static         Build static binaries],
	[
		if test "x$enableval" = "xyes"; then
			STATIC=1
			AC_MSG_NOTICE(Static Build)
		fi
	], [])
AC_SUBST(STATIC)

hardenbuild=1
AC_ARG_ENABLE(harden,
	[  --disable-harden        Don't set hardened build flags],
	[
		if test "x$enableval" = "xno"; then
			hardenbuild=0
			AC_MSG_NOTICE(Disabling hardened build flags)
		fi
	], [])

if test "$hardenbuild" -eq 1; then
	AC_MSG_NOTICE(Checking for available hardened build flags:)
	# relocation flags don't make sense for static builds
	if test "$STATIC" -ne 1; then
		# pie
		DB_TRYADDCFLAGS([-fPIE])

		OLDLDFLAGS="$LDFLAGS"
		TESTFLAGS="-Wl,-pie"
		LDFLAGS="$LDFLAGS $TESTFLAGS"
		AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[
				LDFLAGS="$OLDLDFLAGS"
				TESTFLAGS="-pie"
				LDFLAGS="$LDFLAGS $TESTFLAGS"
				AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
					[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
					[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
					)
			]
			)
		# readonly elf relocation sections (relro)
		OLDLDFLAGS="$LDFLAGS"
		TESTFLAGS="-Wl,-z,now -Wl,-z,relro"
		LDFLAGS="$LDFLAGS $TESTFLAGS"
		AC_LINK_IFELSE([AC_LANG_PROGRAM([])], 
			[AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			[AC_MSG_NOTICE([Not setting $TESTFLAGS]); LDFLAGS="$OLDLDFLAGS" ]
			)
	fi # non-static
	# stack protector. -strong is good but only in gcc 4.9 or later
	OLDCFLAGS="$CFLAGS"
	TESTFLAGS="-fstack-protector-strong"
	CFLAGS="$CFLAGS $TESTFLAGS"
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
	    [AC_MSG_NOTICE([Setting $TESTFLAGS])], 
	    [
			CFLAGS="$OLDCFLAGS"
			TESTFLAGS="-fstack-protector --param=ssp-buffer-size=4"
			CFLAGS="$CFLAGS $TESTFLAGS"
			AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], 
			    [AC_MSG_NOTICE([Setting $TESTFLAGS])], 
			    [AC_MSG_NOTICE([Not setting $TESTFLAGS]); CFLAGS="$OLDCFLAGS" ]
			    )
	    ]
	    )
	# FORTIFY_SOURCE
	DB_TRYADDCFLAGS([-D_FORTIFY_SOURCE=2])

	# Spectre v2 mitigations
	DB_TRYADDCFLAGS([-mfunction-return=thunk])
	DB_TRYADDCFLAGS([-mindirect-branch=thunk])

fi

# large file support is useful for scp
AC_SYS_LARGEFILE

# Host specific options
# this isn't a definitive list of hosts, they are just added as required
AC_CANONICAL_HOST

case "$host" in

*-*-linux*)
	no_ptmx_check=1
	;;

*-*-solaris*)
	CFLAGS="$CFLAGS -I/usr/local/include"
	LDFLAGS="$LDFLAGS -L/usr/local/lib -R/usr/local/lib"
	conf_lastlog_location="/var/adm/lastlog"
	AC_MSG_CHECKING(for obsolete utmp and wtmp in solaris2.x)
	sol2ver=`echo "$host"| sed -e 's/.*[[0-9]]\.//'`
	if test "$sol2ver" -ge 8; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(DISABLE_UTMP,1,Disable utmp)
		AC_DEFINE(DISABLE_WTMP,1,Disable wtmp)
	else
		AC_MSG_RESULT(no)
	fi
	AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
	AC_CHECK_LIB(nsl, yp_match, LIBS="$LIBS -lnsl")
	;;

*-*-aix*)
	AC_DEFINE(AIX,1,Using AIX)
	# OpenSSH thinks it's broken. If it isn't, let me know.
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
	
*-*-hpux*)
	LIBS="$LIBS -lsec"
	# It's probably broken.
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
*-dec-osf*)
	AC_DEFINE(BROKEN_GETADDRINFO,1,Broken getaddrinfo)
	;;
esac

AC_CHECK_TOOL(AR, ar, :)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_CHECK_TOOL(STRIP, strip, :)
AC_CHECK_TOOL(INSTALL, install, :)

dnl Can't use login() or logout() with uclibc
AC_CHECK_DECL(__UCLIBC__, 
	[
	no_loginfunc_check=1
	AC_MSG_NOTICE([Using uClibc - login() and logout() probably don't work, so we won't use them.])
	],,)

dnl We test for crypt() specially. On Linux (and others?) it resides in libcrypt
dnl but we don't want link all binaries to -lcrypt, just dropbear server.
dnl OS X doesn't need -lcrypt 
AC_CHECK_FUNC(crypt, found_crypt_func=here)
AC_CHECK_LIB(crypt, crypt, 
	[
	CRYPTLIB="-lcrypt"
	found_crypt_func=here
	])
AC_SUBST(CRYPTLIB)	
if test "t$found_crypt_func" = there; then
AC_DEFINE(HAVE_CRYPT, 1, [crypt() function])
fi

# Check if zlib is needed
AC_ARG_WITH(zlib,
	[  --with-zlib=PATH        Use zlib in PATH],
	[
		# option is given
		if test -d "$withval/lib"; then
			LDFLAGS="-L${withval}/lib ${LDFLAGS}"
		else
			LDFLAGS="-L${withval} ${LDFLAGS}"
		fi
		if test -d "$withval/include"; then
			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
		else
			CPPFLAGS="-I${withval} ${CPPFLAGS}"
		fi
	]
)

AC_ARG_ENABLE(zlib,
	[  --disable-zlib          Don't include zlib support],
	[
		if test "x$enableval" = "xno"; then
			AC_DEFINE(DISABLE_ZLIB,1,Use zlib)
			AC_MSG_NOTICE(Disabling zlib)
		else
			AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
			AC_MSG_NOTICE(Enabling zlib)
		fi
	],
	[
		# if not disabled, check for zlib
		AC_CHECK_LIB(z, deflate, , AC_MSG_ERROR([*** zlib missing - install first or check config.log ***]))
		AC_MSG_NOTICE(Enabling zlib)
	]
)

# Check if pam is needed
AC_ARG_WITH(pam,
	[  --with-pam=PATH        Use pam in PATH],
	[
		# option is given
		if test -d "$withval/lib"; then
			LDFLAGS="-L${withval}/lib ${LDFLAGS}"
		else
			LDFLAGS="-L${withval} ${LDFLAGS}"
		fi
		if test -d "$withval/include"; then
			CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
		else
			CPPFLAGS="-I${withval} ${CPPFLAGS}"
		fi
	]
)


AC_ARG_ENABLE(pam,
	[  --enable-pam            Try to include PAM support],
	[
		if test "x$enableval" = "xyes"; then
			AC_CHECK_LIB(pam, pam_authenticate, , AC_MSG_ERROR([*** PAM missing - install first or check config.log ***]))
			AC_MSG_NOTICE(Enabling PAM)
			AC_CHECK_FUNCS(pam_fail_delay)
		else
			AC_DEFINE(DISABLE_PAM,1,Use PAM)
			AC_MSG_NOTICE(Disabling PAM)
		fi
	],
	[
		# disable it by default
		AC_DEFINE(DISABLE_PAM,1,Use PAM)
		AC_MSG_NOTICE(Disabling PAM)
	]
)

AC_ARG_ENABLE(openpty,
	[  --disable-openpty       Don't use openpty, use alternative method],
	[
		if test "x$enableval" = "xno"; then
			AC_MSG_NOTICE(Not using openpty)
		else
			AC_MSG_NOTICE(Using openpty if available)
			AC_SEARCH_LIBS(openpty, util, [dropbear_cv_func_have_openpty=yes])
		fi
	],
	[
		AC_MSG_NOTICE(Using openpty if available)
		AC_SEARCH_LIBS(openpty, util, [dropbear_cv_func_have_openpty=yes])
	]
)

if test "x$dropbear_cv_func_have_openpty" = "xyes"; then
	AC_DEFINE(HAVE_OPENPTY,,Have openpty() function)
	no_ptc_check=yes
	no_ptmx_check=yes
fi

AC_ARG_ENABLE(syslog,
	[  --disable-syslog        Don't include syslog support],
	[
		if test "x$enableval" = "xno"; then
			AC_DEFINE(DISABLE_SYSLOG,1,Using syslog)
			AC_MSG_NOTICE(Disabling syslog)
		else
			AC_MSG_NOTICE(Enabling syslog)
		fi
	],
	[
		AC_MSG_NOTICE(Enabling syslog)
	]
)

AC_ARG_ENABLE(shadow,
	[  --disable-shadow        Don't use shadow passwords (if available)],
	[
		if test "x$enableval" = "xno"; then
			AC_MSG_NOTICE(Not using shadow passwords)
		else
			AC_CHECK_HEADERS([shadow.h])
			AC_MSG_NOTICE(Using shadow passwords if available)
		fi
	],
	[
		AC_CHECK_HEADERS([shadow.h])
		AC_MSG_NOTICE(Using shadow passwords if available)
	]
)

AC_ARG_ENABLE(epka,
	[  --enable-epka           Enable support for External Public Key Authentication plug-in],
	[
		AC_DEFINE(DROPBEAR_EPKA, 1, External Public Key Authentication)
		AC_MSG_NOTICE(Enabling support for External Public Key Authentication)
		DROPBEAR_EPKA=1
	],
	[
		AC_DEFINE(DROPBEAR_EPKA, 0, External Public Key Authentication)
		DROPBEAR_EPKA=0
	]

)
AC_SUBST(DROPBEAR_EPKA)

AC_ARG_ENABLE(fuzz,
	[  --enable-fuzz           Build fuzzing. Not recommended for deployment.],
	[
		AC_DEFINE(DROPBEAR_FUZZ, 1, Fuzzing)
		AC_MSG_NOTICE(Enabling fuzzing)
		DROPBEAR_FUZZ=1
		# libfuzzer needs linking with c++ libraries
		AC_PROG_CXX
	],
	[
		AC_DEFINE(DROPBEAR_FUZZ, 0, Fuzzing)
		DROPBEAR_FUZZ=0
	]

)
AC_SUBST(DROPBEAR_FUZZ)
AC_SUBST(CXX)

# Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([netinet/in.h netinet/tcp.h \
	crypt.h \
	pty.h libutil.h libgen.h inttypes.h stropts.h utmp.h \
	utmpx.h lastlog.h paths.h util.h netdb.h security/pam_appl.h \
	pam/pam_appl.h netinet/in_systm.h sys/uio.h linux/pkt_sched.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_UID_T
AC_TYPE_MODE_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_HEADER_TIME

AC_CHECK_TYPES([uint8_t, u_int8_t, uint16_t, u_int16_t, uint32_t, u_int32_t])
AC_CHECK_TYPES([struct sockaddr_storage])
AC_CHECK_TYPE([socklen_t], ,[
	AC_MSG_CHECKING([for socklen_t equivalent])
	AC_CACHE_VAL([curl_cv_socklen_t_equiv],
	[
	# Systems have either "struct sockaddr *" or
	# "void *" as the second argument to getpeername
	curl_cv_socklen_t_equiv=
	for arg2 in "struct sockaddr" void; do
		for t in int size_t unsigned long "unsigned long"; do
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>

			int getpeername (int, $arg2 *, $t *);
		]],[[
			$t len;
			getpeername(0,0,&len);
		]])],[
			curl_cv_socklen_t_equiv="$t"
			break
		])
		done
	done

	if test "x$curl_cv_socklen_t_equiv" = x; then
		AC_MSG_ERROR([Cannot find a type to use in place of socklen_t])
	fi
	])
	AC_MSG_RESULT($curl_cv_socklen_t_equiv)
	AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv,
			[type to use in place of socklen_t if not defined])],
	[#include <sys/types.h>
	#include <sys/socket.h>])

# for the fake-rfc2553 stuff - straight from OpenSSH

AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_have_struct_sockaddr_storage, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
		]],
		[[ if (sizeof(struct sockaddr_storage)) return 0 ]])],
		[ ac_cv_have_struct_sockaddr_storage="yes" ],
		[ ac_cv_have_struct_sockaddr_storage="no" ]
	)
])
if test "x$ac_cv_have_struct_sockaddr_storage" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_SOCKADDR_STORAGE)
fi

AC_CACHE_CHECK([for struct sockaddr_in6], ac_cv_have_struct_sockaddr_in6, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <netinet/in.h>
		]],
		[[ if (sizeof(struct sockaddr_in6)) return 0 ]])],
		[ ac_cv_have_struct_sockaddr_in6="yes" ],
		[ ac_cv_have_struct_sockaddr_in6="no" ]
	)
])
if test "x$ac_cv_have_struct_sockaddr_in6" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_SOCKADDR_IN6,1,Have struct sockaddr_in6)
fi

AC_CACHE_CHECK([for struct in6_addr], ac_cv_have_struct_in6_addr, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <netinet/in.h>
		]],
		[[ if (sizeof(struct in6_addr)) return 0 ]])],
		[ ac_cv_have_struct_in6_addr="yes" ],
		[ ac_cv_have_struct_in6_addr="no" ]
	)
])
if test "x$ac_cv_have_struct_in6_addr" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_IN6_ADDR,1,Have struct in6_addr)
fi

AC_CACHE_CHECK([for struct addrinfo], ac_cv_have_struct_addrinfo, [
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
		]],
		[[ if (sizeof(struct addrinfo)) return 0 ]])],
		[ ac_cv_have_struct_addrinfo="yes" ],
		[ ac_cv_have_struct_addrinfo="no" ]
	)
])
if test "x$ac_cv_have_struct_addrinfo" = "xyes" ; then
	AC_DEFINE(HAVE_STRUCT_ADDRINFO,1,Have struct addrinfo)
fi


# IRIX has a const char return value for gai_strerror()
AC_CHECK_FUNCS(gai_strerror,[
	AC_DEFINE(HAVE_GAI_STRERROR)
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

const char *gai_strerror(int);]],[[
char *str;

str = gai_strerror(0);]])],[
		AC_DEFINE(HAVE_CONST_GAI_STRERROR_PROTO, 1,
		[Define if gai_strerror() returns const char *])])])

# for loginrec.c

AC_CHECK_MEMBERS([struct utmp.ut_host, struct utmp.ut_pid, struct utmp.ut_type, struct utmp.ut_tv, struct utmp.ut_id, struct utmp.ut_addr, struct utmp.ut_addr_v6, struct utmp.ut_exit, struct utmp.ut_time],,,[
#include <sys/types.h>
#if HAVE_UTMP_H
#include <utmp.h>
#endif
])

AC_CHECK_MEMBERS([struct utmpx.ut_host, struct utmpx.ut_syslen, struct utmpx.ut_type, struct utmpx.ut_id, struct utmpx.ut_addr, struct utmpx.ut_addr_v6, struct utmpx.ut_time, struct utmpx.ut_tv],,,[
#include <sys/types.h>
#include <sys/socket.h>
#if HAVE_UTMPX_H
#include <utmpx.h>
#endif
])

AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],,,[
#include <sys/types.h>
#include <sys/socket.h>
])

AC_CHECK_FUNCS(endutent getutent getutid getutline pututline setutent)
AC_CHECK_FUNCS(utmpname)
AC_CHECK_FUNCS(endutxent getutxent getutxid getutxline pututxline )
AC_CHECK_FUNCS(setutxent utmpxname)
AC_CHECK_FUNCS(logout updwtmp logwtmp)

# POSIX monotonic time
AC_CHECK_FUNCS(clock_gettime)

# OS X monotonic time
AC_CHECK_HEADERS([mach/mach_time.h])
AC_CHECK_FUNCS(mach_absolute_time)

AC_CHECK_FUNCS(explicit_bzero memset_s)

AC_ARG_ENABLE(bundled-libtom,
[  --enable-bundled-libtom       Force using bundled libtomcrypt/libtommath even if a system version exists.
  --disable-bundled-libtom      Force using system libtomcrypt/libtommath, fail if it does not exist.
                                Default is to use system if available, otherwise bundled.],
	[
		if test "x$enableval" = "xyes"; then
			BUNDLED_LIBTOM=1
			AC_MSG_NOTICE(Forcing bundled libtom*)
		else
			BUNDLED_LIBTOM=0
			AC_CHECK_LIB(tommath, mp_exptmod, LIBTOM_LIBS="-ltommath $LIBTOM_LIBS",
				[AC_MSG_ERROR([Missing system libtommath and --disable-bundled-libtom was specified])] )
			AC_CHECK_LIB(tomcrypt, register_cipher, LIBTOM_LIBS="-ltomcrypt $LIBTOM_LIBS",
				[AC_MSG_ERROR([Missing system libtomcrypt and --disable-bundled-libtom was specified])] )
		fi
	],
	[
		BUNDLED_LIBTOM=0
		AC_CHECK_LIB(tommath, mp_exptmod, LIBTOM_LIBS="-ltommath $LIBTOM_LIBS", BUNDLED_LIBTOM=1)
		AC_CHECK_LIB(tomcrypt, register_cipher, LIBTOM_LIBS="-ltomcrypt $LIBTOM_LIBS", BUNDLED_LIBTOM=1)
	]
)

if test $BUNDLED_LIBTOM = 1 ; then
	AC_DEFINE(BUNDLED_LIBTOM,1,Use bundled libtom) 
fi

AC_SUBST(LIBTOM_LIBS)
AC_SUBST(BUNDLED_LIBTOM)

dnl Added from OpenSSH 3.6.1p2's configure.ac

dnl allow user to disable some login recording features
AC_ARG_ENABLE(lastlog,
	[  --disable-lastlog       Disable use of lastlog even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_LASTLOG,1,Disable use of lastlog())
		fi
	]
)
AC_ARG_ENABLE(utmp,
	[  --disable-utmp          Disable use of utmp even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_UTMP,1,Disable use of utmp)
		fi
	]
)
AC_ARG_ENABLE(utmpx,
	[  --disable-utmpx         Disable use of utmpx even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_UTMPX,1,Disable use of utmpx)
		fi
	]
)
AC_ARG_ENABLE(wtmp,
	[  --disable-wtmp          Disable use of wtmp even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_WTMP,1,Disable use of wtmp)
		fi
	]
)
AC_ARG_ENABLE(wtmpx,
	[  --disable-wtmpx         Disable use of wtmpx even if detected [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_WTMPX,1,Disable use of wtmpx)
		fi
	]
)
AC_ARG_ENABLE(loginfunc,
	[  --disable-loginfunc     Disable use of login() etc. [no]],
	[ no_loginfunc_check=1
	AC_MSG_NOTICE([Not using login() etc]) ]
)
AC_ARG_ENABLE(pututline,
	[  --disable-pututline     Disable use of pututline() etc. ([uw]tmp) [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_PUTUTLINE,1,Disable use of pututline())
		fi
	]
)
AC_ARG_ENABLE(pututxline,
	[  --disable-pututxline    Disable use of pututxline() etc. ([uw]tmpx) [no]],
	[
		if test "x$enableval" = "xno" ; then
			AC_DEFINE(DISABLE_PUTUTXLINE,1,Disable use of pututxline())
		fi
	]
)
AC_ARG_WITH(lastlog,
  [  --with-lastlog=FILE|DIR specify lastlog location [common locations]],
	[
		if test "x$withval" = "xno" ; then	
			AC_DEFINE(DISABLE_LASTLOG)
		else
			conf_lastlog_location=$withval
		fi
	]
)

if test -z "$no_loginfunc_check"; then
	dnl    Checks for libutil functions (login(), logout() etc, not openpty() )
	AC_SEARCH_LIBS(login, util bsd, [AC_DEFINE(HAVE_LOGIN,1,[Have login() function])])
	AC_CHECK_FUNCS(logout updwtmp logwtmp)
fi

dnl lastlog, [uw]tmpx? detection
dnl  NOTE: set the paths in the platform section to avoid the
dnl   need for command-line parameters
dnl lastlog and [uw]tmp are subject to a file search if all else fails

dnl lastlog detection
dnl  NOTE: the code itself will detect if lastlog is a directory
AC_MSG_CHECKING([if your system defines LASTLOG_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_LASTLOG_H
#  include <lastlog.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
#ifdef HAVE_LOGIN_H
# include <login.h>
#endif
	]],
	[[ char *lastlog = LASTLOG_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[
		AC_MSG_RESULT(no)
		AC_MSG_CHECKING([if your system defines _PATH_LASTLOG])
		AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_LASTLOG_H
#  include <lastlog.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
		]],
		[[ char *lastlog = _PATH_LASTLOG; ]])],
		[ AC_MSG_RESULT(yes) ],
		[
			AC_MSG_RESULT(no)
			system_lastlog_path=no
		])
	]
)

if test -z "$conf_lastlog_location"; then
	if test x"$system_lastlog_path" = x"no" ; then
		for f in /var/log/lastlog /usr/adm/lastlog /var/adm/lastlog /etc/security/lastlog ; do
				if (test -d "$f" || test -f "$f") ; then
					conf_lastlog_location=$f
				fi
		done
		if test -z "$conf_lastlog_location"; then
			AC_MSG_WARN([** Cannot find lastlog **])
			dnl Don't define DISABLE_LASTLOG - that means we don't try wtmp/wtmpx
		fi
	fi
fi

if test -n "$conf_lastlog_location"; then
	AC_DEFINE_UNQUOTED(CONF_LASTLOG_FILE, "$conf_lastlog_location", lastlog file location)
fi	

dnl utmp detection
AC_MSG_CHECKING([if your system defines UTMP_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	]],
	[[ char *utmp = UTMP_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_utmp_path=no ]
)
if test -z "$conf_utmp_location"; then
	if test x"$system_utmp_path" = x"no" ; then
		for f in /etc/utmp /usr/adm/utmp /var/run/utmp; do
			if test -f $f ; then
				conf_utmp_location=$f
			fi
		done
		if test -z "$conf_utmp_location"; then
			AC_DEFINE(DISABLE_UTMP)
		fi
	fi
fi
if test -n "$conf_utmp_location"; then
	AC_DEFINE_UNQUOTED(CONF_UTMP_FILE, "$conf_utmp_location", utmp file location)
fi	

dnl wtmp detection
AC_MSG_CHECKING([if your system defines WTMP_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_UTMP_H
#  include <utmp.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	]],
	[[ char *wtmp = WTMP_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_wtmp_path=no ]
)
if test -z "$conf_wtmp_location"; then
	if test x"$system_wtmp_path" = x"no" ; then
		for f in /usr/adm/wtmp /var/log/wtmp; do
			if test -f $f ; then
				conf_wtmp_location=$f
			fi
		done
		if test -z "$conf_wtmp_location"; then
			AC_DEFINE(DISABLE_WTMP)
		fi
	fi
fi
if test -n "$conf_wtmp_location"; then
	AC_DEFINE_UNQUOTED(CONF_WTMP_FILE, "$conf_wtmp_location", wtmp file location)
fi	


dnl utmpx detection - I don't know any system so perverse as to require
dnl  utmpx, but not define UTMPX_FILE (ditto wtmpx.) No doubt it's out
dnl  there, though.
AC_MSG_CHECKING([if your system defines UTMPX_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <utmp.h>
#ifdef HAVE_UTMPX_H
#include <utmpx.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	]],
	[[ char *utmpx = UTMPX_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_utmpx_path=no ]
)
if test -z "$conf_utmpx_location"; then
	if test x"$system_utmpx_path" = x"no" ; then
		AC_DEFINE(DISABLE_UTMPX)
	fi
else
	AC_DEFINE_UNQUOTED(CONF_UTMPX_FILE, "$conf_utmpx_location", utmpx file location)
fi	

dnl wtmpx detection
AC_MSG_CHECKING([if your system defines WTMPX_FILE])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#ifdef HAVE_UTMP_H
#  include <utmp.h>
#endif
#ifdef HAVE_UTMPX_H
#  include <utmpx.h>
#endif
#ifdef HAVE_PATHS_H
#  include <paths.h>
#endif
	]],
	[[ char *wtmpx = WTMPX_FILE; ]])],
	[ AC_MSG_RESULT(yes) ],
	[ AC_MSG_RESULT(no)
	  system_wtmpx_path=no ]
)
if test -z "$conf_wtmpx_location"; then
	if test x"$system_wtmpx_path" = x"no" ; then
		AC_DEFINE(DISABLE_WTMPX)
	fi
else
	AC_DEFINE_UNQUOTED(CONF_WTMPX_FILE, "$conf_wtmpx_location", wtmpx file location)
fi	

# Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_FUNC_SELECT_ARGTYPES
AC_CHECK_FUNCS([getpass getspnam getusershell putenv])
AC_CHECK_FUNCS([clearenv strlcpy strlcat daemon basename _getpty getaddrinfo ])
AC_CHECK_FUNCS([freeaddrinfo getnameinfo fork writev getgrouplist])

AC_SEARCH_LIBS(basename, gen, AC_DEFINE(HAVE_BASENAME))

# Solaris needs ptmx
if test -z "$no_ptmx_check" ; then
	if test x"$cross_compiling" = x"no" ; then
		if test -e /dev/ptmx ; then
			AC_DEFINE(USE_DEV_PTMX,1,Use /dev/ptmx)
		fi
	else
		AC_MSG_NOTICE([Not checking for /dev/ptmx, we're cross-compiling])
	fi
fi

if test -z "$no_ptc_check" ; then
	if test x"$cross_compiling" = x"no" ; then
		if test -e /dev/ptc ; then
			AC_DEFINE(HAVE_DEV_PTS_AND_PTC,1,Use /dev/ptc & /dev/pts)
		fi
	else
		AC_MSG_NOTICE([Not checking for /dev/ptc & /dev/pts since we're cross-compiling])
	fi
fi

AC_EXEEXT

if test $BUNDLED_LIBTOM = 1 ; then
(cd $srcdir; find libtomcrypt -type d) | xargs mkdir -pv 
LIBTOM_FILES="libtomcrypt/Makefile libtommath/Makefile"
fi

AC_CONFIG_HEADER(config.h)
AC_CONFIG_FILES(Makefile $LIBTOM_FILES)
AC_OUTPUT

AC_MSG_NOTICE()
if test $BUNDLED_LIBTOM = 1 ; then
AC_MSG_NOTICE([Using bundled libtomcrypt and libtommath])
else
AC_MSG_NOTICE([Using system libtomcrypt and libtommath])
fi


if test "x$ac_cv_func_getpass" != xyes; then
AC_MSG_NOTICE()
AC_MSG_NOTICE([getpass() not available, dbclient will only have public-key authentication])
fi

if test "t$found_crypt_func" != there; then
AC_MSG_NOTICE()
AC_MSG_NOTICE([crypt() not available, dropbear server will not have password authentication])
fi

AC_MSG_NOTICE()
AC_MSG_NOTICE([Now edit options.h to choose features.])