configure.ac - manifest_repos/cryptsetup - Git at Google

 AC_PREREQ([2.67])
 AC_INIT([cryptsetup],[1.7.4-git])

 dnl library version from <major>.<minor>.<release>[-<suffix>]
 LIBCRYPTSETUP_VERSION=$(echo $PACKAGE_VERSION | cut -f1 -d-)
 LIBCRYPTSETUP_VERSION_INFO=11:0:7

 AM_SILENT_RULES([yes])
 AC_CONFIG_SRCDIR(src/cryptsetup.c)
 AC_CONFIG_MACRO_DIR([m4])

 AC_CONFIG_HEADERS([config.h:config.h.in])

 # We do not want to run test in parallel. Really.
 # http://lists.gnu.org/archive/html/automake/2013-01/msg00060.html

 # For old automake use this
 #AM_INIT_AUTOMAKE(dist-xz)
 AM_INIT_AUTOMAKE([dist-xz 1.12 serial-tests])

 if test "x$prefix" = "xNONE"; then
 	sysconfdir=/etc
 fi
 AC_PREFIX_DEFAULT(/usr)

 AC_CANONICAL_HOST
 AC_USE_SYSTEM_EXTENSIONS
 AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 AC_ENABLE_STATIC(no)
 LT_INIT
 PKG_PROG_PKG_CONFIG

 AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_CHECK_HEADERS(fcntl.h malloc.h inttypes.h sys/ioctl.h sys/mman.h \
 	sys/sysmacros.h ctype.h unistd.h locale.h byteswap.h endian.h)

 AC_CHECK_HEADERS(uuid/uuid.h,,[AC_MSG_ERROR([You need the uuid library.])])
 AC_CHECK_HEADER(libdevmapper.h,,[AC_MSG_ERROR([You need the device-mapper library.])])

 saved_LIBS=$LIBS
 AC_CHECK_LIB(uuid, uuid_clear, ,[AC_MSG_ERROR([You need the uuid library.])])
 AC_SUBST(UUID_LIBS, $LIBS)
 LIBS=$saved_LIBS

 AC_SEARCH_LIBS([clock_gettime],[rt posix4])
 AC_CHECK_FUNCS([posix_memalign clock_gettime])

 if test "x$enable_largefile" = "xno" ; then
   AC_MSG_ERROR([Building with --disable-largefile is not supported, it can cause data corruption.])
 fi

 AC_C_CONST
 AC_C_BIGENDIAN
 AC_TYPE_OFF_T
 AC_SYS_LARGEFILE
 AC_FUNC_FSEEKO
 AC_PROG_GCC_TRADITIONAL
 AC_FUNC_STRERROR_R

 dnl ==========================================================================

 AM_GNU_GETTEXT([external],[need-ngettext])
 AM_GNU_GETTEXT_VERSION([0.15])

 dnl ==========================================================================

 saved_LIBS=$LIBS
 AC_CHECK_LIB(popt, poptConfigFileToString,,
 	[AC_MSG_ERROR([You need popt 1.7 or newer to compile.])])
 AC_SUBST(POPT_LIBS, $LIBS)
 LIBS=$saved_LIBS

 dnl ==========================================================================
 dnl FIPS extensions (only for RHEL)
 AC_ARG_ENABLE([fips], AS_HELP_STRING([--enable-fips],[enable FIPS mode restrictions]),
 [with_fips=$enableval],
 [with_fips=no])

 if test "x$with_fips" = "xyes"; then
 	AC_DEFINE(ENABLE_FIPS, 1, [Enable FIPS mode restrictions])

 	if test "x$enable_static" = "xyes" -o "x$enable_static_cryptsetup" = "xyes" ; then
 		AC_MSG_ERROR([Static build is not compatible with FIPS.])
 	fi
 fi

 AC_DEFUN([NO_FIPS], [
 	if test "x$with_fips" = "xyes"; then
 		AC_MSG_ERROR([This option is not compatible with FIPS.])
 	fi
 ])

 dnl ==========================================================================
 dnl pwquality library (cryptsetup CLI only)
 AC_ARG_ENABLE([pwquality],
 	      AS_HELP_STRING([--enable-pwquality],
 			     [enable password quality checking using pwquality library]),
 	      [with_pwquality=$enableval],
 	      [with_pwquality=no])

 if test "x$with_pwquality" = "xyes"; then
 	AC_DEFINE(ENABLE_PWQUALITY, 1, [Enable password quality checking using pwquality library])
 	PKG_CHECK_MODULES([PWQUALITY], [pwquality >= 1.0.0],,
 		AC_MSG_ERROR([You need pwquality library.]))

 	dnl FIXME: this is really hack for now
 	PWQUALITY_STATIC_LIBS="$PWQUALITY_LIBS -lcrack -lz"
 fi

 dnl ==========================================================================
 dnl passwdqc library (cryptsetup CLI only)
 AC_ARG_ENABLE([passwdqc],
 	      AS_HELP_STRING([--enable-passwdqc@<:@=CONFIG_PATH@:>@],
 			     [enable password quality checking using passwdqc library (optionally with CONFIG_PATH)]),
 	      [enable_passwdqc=$enableval],
 	      [enable_passwdqc=no])

 case "$enable_passwdqc" in
 	yes|no) use_passwdqc_config="" ;;
 	/*) use_passwdqc_config="$enable_passwdqc"; enable_passwdqc=yes ;;
 	*) AC_MSG_ERROR([Unrecognized --enable-passwdqc parameter.]) ;;
 esac
 AC_DEFINE_UNQUOTED([PASSWDQC_CONFIG_FILE], ["$use_passwdqc_config"], [passwdqc library config file])

 if test "x$enable_passwdqc" = "xyes"; then
 	AC_DEFINE(ENABLE_PASSWDQC, 1, [Enable password quality checking using passwdqc library])

 	PASSWDQC_LIBS="-lpasswdqc"
 fi

 if test "x$with_pwquality$enable_passwdqc" = "xyesyes"; then
 	AC_MSG_ERROR([--enable-pwquality and --enable-passwdqc are mutually incompatible.])
 fi

 dnl ==========================================================================
 dnl Crypto backend functions

 AC_DEFUN([CONFIGURE_GCRYPT], [
 	if test "x$with_fips" = "xyes"; then
 		GCRYPT_REQ_VERSION=1.4.5
 	else
 		GCRYPT_REQ_VERSION=1.1.42
 	fi
 	dnl Check if we can use gcrypt PBKDF2 (1.6.0 supports empty password)
 	AC_ARG_ENABLE([gcrypt-pbkdf2], AS_HELP_STRING([--enable-gcrypt-pbkdf2],[force enable internal gcrypt PBKDF2]),
 		if test "x$enableval" = "xyes"; then
 			[use_internal_pbkdf2=0]
 		else
 			[use_internal_pbkdf2=1]
 		fi,
 		[AM_PATH_LIBGCRYPT([1.6.1], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])])
 	AM_PATH_LIBGCRYPT($GCRYPT_REQ_VERSION,,[AC_MSG_ERROR([You need the gcrypt library.])])

 	AC_MSG_CHECKING([if internal cryptsetup PBKDF2 is compiled-in])
 	if test $use_internal_pbkdf2 = 0; then
 		AC_MSG_RESULT([no])
 	else
 		AC_MSG_RESULT([yes])
 		NO_FIPS([])
 	fi

 	if test x$enable_static_cryptsetup = xyes; then
 		saved_LIBS=$LIBS
 		LIBS="$saved_LIBS $LIBGCRYPT_LIBS -static"
 		AC_CHECK_LIB(gcrypt, gcry_check_version,,
 			AC_MSG_ERROR([Cannot find static gcrypt library.]),
 			[-lgpg-error])
 		LIBGCRYPT_STATIC_LIBS="$LIBGCRYPT_LIBS -lgpg-error"
 		LIBS=$saved_LIBS
         fi

 	CRYPTO_CFLAGS=$LIBGCRYPT_CFLAGS
 	CRYPTO_LIBS=$LIBGCRYPT_LIBS
 	CRYPTO_STATIC_LIBS=$LIBGCRYPT_STATIC_LIBS

 	AC_DEFINE_UNQUOTED(GCRYPT_REQ_VERSION, ["$GCRYPT_REQ_VERSION"], [Requested gcrypt version])
 ])

 AC_DEFUN([CONFIGURE_OPENSSL], [
 	PKG_CHECK_MODULES([OPENSSL], [openssl >= 0.9.8],,
 		AC_MSG_ERROR([You need openssl library.]))
 	CRYPTO_CFLAGS=$OPENSSL_CFLAGS
 	CRYPTO_LIBS=$OPENSSL_LIBS
 	use_internal_pbkdf2=0

 	if test x$enable_static_cryptsetup = xyes; then
 		saved_PKG_CONFIG=$PKG_CONFIG
 		PKG_CONFIG="$PKG_CONFIG --static"
 		PKG_CHECK_MODULES([OPENSSL_STATIC], [openssl])
 		CRYPTO_STATIC_LIBS=$OPENSSL_STATIC_LIBS
 		PKG_CONFIG=$saved_PKG_CONFIG
 	fi
 	NO_FIPS([])
 ])

 AC_DEFUN([CONFIGURE_NSS], [
 	if test x$enable_static_cryptsetup = xyes; then
 		AC_MSG_ERROR([Static build of cryptsetup is not supported with NSS.])
 	fi

 	AC_MSG_WARN([NSS backend does NOT provide backward compatibility (missing ripemd160 hash).])

 	PKG_CHECK_MODULES([NSS], [nss],,
 		AC_MSG_ERROR([You need nss library.]))

 	saved_CFLAGS=$CFLAGS
 	CFLAGS="$CFLAGS $NSS_CFLAGS"
 	AC_CHECK_DECLS([NSS_GetVersion], [], [], [#include <nss.h>])
 	CFLAGS=$saved_CFLAGS

 	CRYPTO_CFLAGS=$NSS_CFLAGS
 	CRYPTO_LIBS=$NSS_LIBS
 	use_internal_pbkdf2=1
 	NO_FIPS([])
 ])

 AC_DEFUN([CONFIGURE_KERNEL], [
 	AC_CHECK_HEADERS(linux/if_alg.h,,
 		[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface.])])
 #	AC_CHECK_DECLS([AF_ALG],,
 #		[AC_MSG_ERROR([You need Linux kernel with userspace crypto interface.])],
 #		[#include <sys/socket.h>])
 	use_internal_pbkdf2=1
 	NO_FIPS([])
 ])

 AC_DEFUN([CONFIGURE_NETTLE], [
 	AC_CHECK_HEADERS(nettle/sha.h,,
 		[AC_MSG_ERROR([You need Nettle cryptographic library.])])

 	saved_LIBS=$LIBS
 	AC_CHECK_LIB(nettle, nettle_pbkdf2_hmac_sha256,,
 		[AC_MSG_ERROR([You need Nettle library version 2.6 or more recent.])])
 	CRYPTO_LIBS=$LIBS
 	LIBS=$saved_LIBS

 	CRYPTO_STATIC_LIBS=$CRYPTO_LIBS
 	use_internal_pbkdf2=0
 	NO_FIPS([])
 ])

 dnl ==========================================================================
 saved_LIBS=$LIBS

 AC_ARG_ENABLE([static-cryptsetup],
 	AS_HELP_STRING([--enable-static-cryptsetup],
 	[enable build of static cryptsetup binary]))
 if test x$enable_static_cryptsetup = xyes; then
 	if test x$enable_static = xno; then
 		AC_MSG_WARN([Requested static cryptsetup build, enabling static library.])
 		enable_static=yes
 	fi
 fi
 AM_CONDITIONAL(STATIC_TOOLS, test x$enable_static_cryptsetup = xyes)

 AC_ARG_ENABLE(veritysetup,
 	AS_HELP_STRING([--disable-veritysetup],
 	[disable veritysetup support]),[], [enable_veritysetup=yes])
 AM_CONDITIONAL(VERITYSETUP, test x$enable_veritysetup = xyes)

 AC_ARG_ENABLE([cryptsetup-reencrypt],
 	AS_HELP_STRING([--enable-cryptsetup-reencrypt],
 	[enable cryptsetup-reencrypt tool]))
 AM_CONDITIONAL(REENCRYPT, test x$enable_cryptsetup_reencrypt = xyes)

 AC_ARG_ENABLE(selinux,
 	AS_HELP_STRING([--disable-selinux],
 	[disable selinux support [default=auto]]),[], [])

 AC_ARG_ENABLE([udev],
 	AS_HELP_STRING([--disable-udev],
 	[disable udev support]),[], enable_udev=yes)

 dnl Try to use pkg-config for devmapper, but fallback to old detection
 PKG_CHECK_MODULES([DEVMAPPER], [devmapper >= 1.02.03],, [
 	AC_CHECK_LIB(devmapper, dm_task_set_name,,
 		[AC_MSG_ERROR([You need the device-mapper library.])])
 	AC_CHECK_LIB(devmapper, dm_task_set_message,,
 		[AC_MSG_ERROR([The device-mapper library on your system is too old.])])
 	DEVMAPPER_LIBS=$LIBS
 ])
 LIBS=$saved_LIBS

 LIBS="$LIBS $DEVMAPPER_LIBS"
 AC_CHECK_DECLS([dm_task_secure_data], [], [], [#include <libdevmapper.h>])
 AC_CHECK_DECLS([dm_task_retry_remove], [], [], [#include <libdevmapper.h>])
 AC_CHECK_DECLS([DM_UDEV_DISABLE_DISK_RULES_FLAG], [have_cookie=yes], [have_cookie=no], [#include <libdevmapper.h>])
 if test "x$enable_udev" = xyes; then
 	if test "x$have_cookie" = xno; then
 		AC_MSG_WARN([The device-mapper library on your system has no udev support, udev support disabled.])
 	else
 		AC_DEFINE(USE_UDEV, 1, [Try to use udev synchronisation?])
 	fi
 fi
 LIBS=$saved_LIBS

 dnl Crypto backend configuration.
 AC_ARG_WITH([crypto_backend],
 	AS_HELP_STRING([--with-crypto_backend=BACKEND], [crypto backend (gcrypt/openssl/nss/kernel/nettle) [gcrypt]]),
 	[], with_crypto_backend=gcrypt
 )

 dnl Kernel crypto API backend needed for benchmark and tcrypt
 AC_ARG_ENABLE([kernel_crypto], AS_HELP_STRING([--disable-kernel_crypto],
 	[disable kernel userspace crypto (no benchmark and tcrypt)]),
 	[with_kernel_crypto=$enableval],
 	[with_kernel_crypto=yes])

 if test "x$with_kernel_crypto" = "xyes"; then
 	AC_CHECK_HEADERS(linux/if_alg.h,,
 		[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface. (Or use --disable-kernel_crypto.)])])
 	AC_DEFINE(ENABLE_AF_ALG, 1, [Enable using of kernel userspace crypto])
 fi

 case $with_crypto_backend in
 	gcrypt)  CONFIGURE_GCRYPT([]) ;;
 	openssl) CONFIGURE_OPENSSL([]) ;;
 	nss)     CONFIGURE_NSS([]) ;;
 	kernel)  CONFIGURE_KERNEL([]) ;;
 	nettle)  CONFIGURE_NETTLE([]) ;;
 	*) AC_MSG_ERROR([Unknown crypto backend.]) ;;
 esac
 AM_CONDITIONAL(CRYPTO_BACKEND_GCRYPT,  test $with_crypto_backend = gcrypt)
 AM_CONDITIONAL(CRYPTO_BACKEND_OPENSSL, test $with_crypto_backend = openssl)
 AM_CONDITIONAL(CRYPTO_BACKEND_NSS,     test $with_crypto_backend = nss)
 AM_CONDITIONAL(CRYPTO_BACKEND_KERNEL,  test $with_crypto_backend = kernel)
 AM_CONDITIONAL(CRYPTO_BACKEND_NETTLE,  test $with_crypto_backend = nettle)

 AM_CONDITIONAL(CRYPTO_INTERNAL_PBKDF2, test $use_internal_pbkdf2 = 1)
 AC_DEFINE_UNQUOTED(USE_INTERNAL_PBKDF2, [$use_internal_pbkdf2], [Use internal PBKDF2])

 dnl Magic for cryptsetup.static build.
 if test x$enable_static_cryptsetup = xyes; then
 	saved_PKG_CONFIG=$PKG_CONFIG
 	PKG_CONFIG="$PKG_CONFIG --static"

 	LIBS="$saved_LIBS -static"
 	AC_CHECK_LIB(popt, poptGetContext,,
 		AC_MSG_ERROR([Cannot find static popt library.]))

 	dnl Try to detect needed device-mapper static libraries, try pkg-config first.
 	LIBS="$saved_LIBS -static"
 	PKG_CHECK_MODULES([DEVMAPPER_STATIC], [devmapper >= 1.02.27],,[
 		DEVMAPPER_STATIC_LIBS=$DEVMAPPER_LIBS
 		if test "x$enable_selinux" != xno; then
 			AC_CHECK_LIB(sepol, sepol_bool_set)
 			AC_CHECK_LIB(selinux, is_selinux_enabled)
 			DEVMAPPER_STATIC_LIBS="$DEVMAPPER_STATIC_LIBS $LIBS"
 		fi
 	])
 	LIBS="$saved_LIBS $DEVMAPPER_STATIC_LIBS"
 	AC_CHECK_LIB(devmapper, dm_task_set_uuid,,
 		AC_MSG_ERROR([Cannot link with static device-mapper library.]))

 	dnl Try to detect uuid static library.
 	LIBS="$saved_LIBS -static"
 	AC_CHECK_LIB(uuid, uuid_generate,,
 		AC_MSG_ERROR([Cannot find static uuid library.]))

 	LIBS=$saved_LIBS
 	PKG_CONFIG=$saved_PKG_CONFIG
 fi

 AC_SUBST([DEVMAPPER_LIBS])
 AC_SUBST([DEVMAPPER_STATIC_LIBS])

 AC_SUBST([PWQUALITY_LIBS])
 AC_SUBST([PWQUALITY_STATIC_LIBS])

 AC_SUBST([PASSWDQC_LIBS])

 AC_SUBST([CRYPTO_CFLAGS])
 AC_SUBST([CRYPTO_LIBS])
 AC_SUBST([CRYPTO_STATIC_LIBS])

 AC_SUBST([LIBCRYPTSETUP_VERSION])
 AC_SUBST([LIBCRYPTSETUP_VERSION_INFO])

 dnl ==========================================================================
 AC_ARG_ENABLE([dev-random], AS_HELP_STRING([--enable-dev-random],
 [use blocking /dev/random by default for key generator (otherwise use /dev/urandom)]),
 [default_rng=/dev/random], [default_rng=/dev/urandom])
 AC_DEFINE_UNQUOTED(DEFAULT_RNG, ["$default_rng"], [default RNG type for key generator])

 dnl ==========================================================================
 AC_DEFUN([CS_DEFINE],
 	[AC_DEFINE_UNQUOTED(DEFAULT_[]m4_translit([$1], [-a-z], [_A-Z]), [$2], [$3])
 ])

 AC_DEFUN([CS_STR_WITH], [AC_ARG_WITH([$1],
 	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
 	[CS_DEFINE([$1], ["$withval"], [$2])],
 	[CS_DEFINE([$1], ["$3"], [$2])]
 )])

 AC_DEFUN([CS_NUM_WITH], [AC_ARG_WITH([$1],
 	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
 	[CS_DEFINE([$1], [$withval], [$2])],
 	[CS_DEFINE([$1], [$3], [$2])]
 )])

 dnl ==========================================================================
 dnl Python bindings
 AC_ARG_ENABLE([python], AS_HELP_STRING([--enable-python],[enable Python bindings]),
 [with_python=$enableval],
 [with_python=no])

 AC_ARG_WITH([python_version],
 	AS_HELP_STRING([--with-python_version=VERSION], [required Python version [2.6]]),
 	[PYTHON_VERSION=$withval], [PYTHON_VERSION=2.6])

 if test "x$with_python" = "xyes"; then
 	AM_PATH_PYTHON([$PYTHON_VERSION])

 	AC_PATH_PROGS([PYTHON_CONFIG], [python${PYTHON_VERSION}-config python-config], [no])
 	if test "${PYTHON_CONFIG}" = "no"; then
 		AC_MSG_ERROR([cannot find python${PYTHON_VERSION}-config or python-config in PATH])
 	fi

 	AC_MSG_CHECKING(for python headers using $PYTHON_CONFIG --includes)
 	PYTHON_INCLUDES=$($PYTHON_CONFIG --includes)
 	AC_MSG_RESULT($PYTHON_INCLUDES)
 	AC_SUBST(PYTHON_INCLUDES)

 	AC_MSG_CHECKING(for python libraries using $PYTHON_CONFIG --libs)
 	PYTHON_LIBS=$($PYTHON_CONFIG --libs)
 	AC_MSG_RESULT($PYTHON_LIBS)
 	AC_SUBST(PYTHON_LIBS)
 fi
 AM_CONDITIONAL([PYTHON_CRYPTSETUP], [test "x$with_python" = "xyes"])

 dnl ==========================================================================
 CS_STR_WITH([plain-hash],   [password hashing function for plain mode], [ripemd160])
 CS_STR_WITH([plain-cipher], [cipher for plain mode], [aes])
 CS_STR_WITH([plain-mode],   [cipher mode for plain mode], [cbc-essiv:sha256])
 CS_NUM_WITH([plain-keybits],[key length in bits for plain mode], [256])

 CS_STR_WITH([luks1-hash],   [hash function for LUKS1 header], [sha256])
 CS_STR_WITH([luks1-cipher], [cipher for LUKS1], [aes])
 CS_STR_WITH([luks1-mode],   [cipher mode for LUKS1], [xts-plain64])
 CS_NUM_WITH([luks1-keybits],[key length in bits for LUKS1], [256])
 CS_NUM_WITH([luks1-iter-time],[PBKDF2 iteration time for LUKS1 (in ms)], [2000])

 CS_STR_WITH([loopaes-cipher], [cipher for loop-AES mode], [aes])
 CS_NUM_WITH([loopaes-keybits],[key length in bits for loop-AES mode], [256])

 CS_NUM_WITH([keyfile-size-maxkb],[maximum keyfile size (in KiB)], [8192])
 CS_NUM_WITH([passphrase-size-max],[maximum keyfile size (in characters)], [512])

 CS_STR_WITH([verity-hash],       [hash function for verity mode], [sha256])
 CS_NUM_WITH([verity-data-block], [data block size for verity mode], [4096])
 CS_NUM_WITH([verity-hash-block], [hash block size for verity mode], [4096])
 CS_NUM_WITH([verity-salt-size],  [salt size for verity mode], [32])
 CS_NUM_WITH([verity-fec-roots],  [parity bytes for verity FEC], [2])

 dnl ==========================================================================

 AC_CONFIG_FILES([ Makefile
 lib/Makefile
 lib/libcryptsetup.pc
 lib/crypto_backend/Makefile
 lib/luks1/Makefile
 lib/loopaes/Makefile
 lib/verity/Makefile
 lib/tcrypt/Makefile
 src/Makefile
 po/Makefile.in
 man/Makefile
 tests/Makefile
 python/Makefile
 ])
 AC_OUTPUT
	AC_PREREQ([2.67])
	AC_INIT([cryptsetup],[1.7.4-git])

	dnl library version from <major>.<minor>.<release>[-<suffix>]
	LIBCRYPTSETUP_VERSION=$(echo $PACKAGE_VERSION \| cut -f1 -d-)
	LIBCRYPTSETUP_VERSION_INFO=11:0:7

	AM_SILENT_RULES([yes])
	AC_CONFIG_SRCDIR(src/cryptsetup.c)
	AC_CONFIG_MACRO_DIR([m4])

	AC_CONFIG_HEADERS([config.h:config.h.in])

	# We do not want to run test in parallel. Really.
	# http://lists.gnu.org/archive/html/automake/2013-01/msg00060.html

	# For old automake use this
	#AM_INIT_AUTOMAKE(dist-xz)
	AM_INIT_AUTOMAKE([dist-xz 1.12 serial-tests])

	if test "x$prefix" = "xNONE"; then
	sysconfdir=/etc
	fi
	AC_PREFIX_DEFAULT(/usr)

	AC_CANONICAL_HOST
	AC_USE_SYSTEM_EXTENSIONS
	AC_PROG_CC
	AM_PROG_CC_C_O
	AC_PROG_CPP
	AC_PROG_INSTALL
	AC_PROG_MAKE_SET
	AC_ENABLE_STATIC(no)
	LT_INIT
	PKG_PROG_PKG_CONFIG

	AC_HEADER_DIRENT
	AC_HEADER_STDC
	AC_CHECK_HEADERS(fcntl.h malloc.h inttypes.h sys/ioctl.h sys/mman.h \
	sys/sysmacros.h ctype.h unistd.h locale.h byteswap.h endian.h)

	AC_CHECK_HEADERS(uuid/uuid.h,,[AC_MSG_ERROR([You need the uuid library.])])
	AC_CHECK_HEADER(libdevmapper.h,,[AC_MSG_ERROR([You need the device-mapper library.])])

	saved_LIBS=$LIBS
	AC_CHECK_LIB(uuid, uuid_clear, ,[AC_MSG_ERROR([You need the uuid library.])])
	AC_SUBST(UUID_LIBS, $LIBS)
	LIBS=$saved_LIBS

	AC_SEARCH_LIBS([clock_gettime],[rt posix4])
	AC_CHECK_FUNCS([posix_memalign clock_gettime])

	if test "x$enable_largefile" = "xno" ; then
	AC_MSG_ERROR([Building with --disable-largefile is not supported, it can cause data corruption.])
	fi

	AC_C_CONST
	AC_C_BIGENDIAN
	AC_TYPE_OFF_T
	AC_SYS_LARGEFILE
	AC_FUNC_FSEEKO
	AC_PROG_GCC_TRADITIONAL
	AC_FUNC_STRERROR_R

	dnl ==========================================================================

	AM_GNU_GETTEXT([external],[need-ngettext])
	AM_GNU_GETTEXT_VERSION([0.15])

	dnl ==========================================================================

	saved_LIBS=$LIBS
	AC_CHECK_LIB(popt, poptConfigFileToString,,
	[AC_MSG_ERROR([You need popt 1.7 or newer to compile.])])
	AC_SUBST(POPT_LIBS, $LIBS)
	LIBS=$saved_LIBS

	dnl ==========================================================================
	dnl FIPS extensions (only for RHEL)
	AC_ARG_ENABLE([fips], AS_HELP_STRING([--enable-fips],[enable FIPS mode restrictions]),
	[with_fips=$enableval],
	[with_fips=no])

	if test "x$with_fips" = "xyes"; then
	AC_DEFINE(ENABLE_FIPS, 1, [Enable FIPS mode restrictions])

	if test "x$enable_static" = "xyes" -o "x$enable_static_cryptsetup" = "xyes" ; then
	AC_MSG_ERROR([Static build is not compatible with FIPS.])
	fi
	fi

	AC_DEFUN([NO_FIPS], [
	if test "x$with_fips" = "xyes"; then
	AC_MSG_ERROR([This option is not compatible with FIPS.])
	fi
	])

	dnl ==========================================================================
	dnl pwquality library (cryptsetup CLI only)
	AC_ARG_ENABLE([pwquality],
	AS_HELP_STRING([--enable-pwquality],
	[enable password quality checking using pwquality library]),
	[with_pwquality=$enableval],
	[with_pwquality=no])

	if test "x$with_pwquality" = "xyes"; then
	AC_DEFINE(ENABLE_PWQUALITY, 1, [Enable password quality checking using pwquality library])
	PKG_CHECK_MODULES([PWQUALITY], [pwquality >= 1.0.0],,
	AC_MSG_ERROR([You need pwquality library.]))

	dnl FIXME: this is really hack for now
	PWQUALITY_STATIC_LIBS="$PWQUALITY_LIBS -lcrack -lz"
	fi

	dnl ==========================================================================
	dnl passwdqc library (cryptsetup CLI only)
	AC_ARG_ENABLE([passwdqc],
	AS_HELP_STRING([--enable-passwdqc@<:@=CONFIG_PATH@:>@],
	[enable password quality checking using passwdqc library (optionally with CONFIG_PATH)]),
	[enable_passwdqc=$enableval],
	[enable_passwdqc=no])

	case "$enable_passwdqc" in
	yes\|no) use_passwdqc_config="" ;;
	/*) use_passwdqc_config="$enable_passwdqc"; enable_passwdqc=yes ;;
	*) AC_MSG_ERROR([Unrecognized --enable-passwdqc parameter.]) ;;
	esac
	AC_DEFINE_UNQUOTED([PASSWDQC_CONFIG_FILE], ["$use_passwdqc_config"], [passwdqc library config file])

	if test "x$enable_passwdqc" = "xyes"; then
	AC_DEFINE(ENABLE_PASSWDQC, 1, [Enable password quality checking using passwdqc library])

	PASSWDQC_LIBS="-lpasswdqc"
	fi

	if test "x$with_pwquality$enable_passwdqc" = "xyesyes"; then
	AC_MSG_ERROR([--enable-pwquality and --enable-passwdqc are mutually incompatible.])
	fi

	dnl ==========================================================================
	dnl Crypto backend functions

	AC_DEFUN([CONFIGURE_GCRYPT], [
	if test "x$with_fips" = "xyes"; then
	GCRYPT_REQ_VERSION=1.4.5
	else
	GCRYPT_REQ_VERSION=1.1.42
	fi
	dnl Check if we can use gcrypt PBKDF2 (1.6.0 supports empty password)
	AC_ARG_ENABLE([gcrypt-pbkdf2], AS_HELP_STRING([--enable-gcrypt-pbkdf2],[force enable internal gcrypt PBKDF2]),
	if test "x$enableval" = "xyes"; then
	[use_internal_pbkdf2=0]
	else
	[use_internal_pbkdf2=1]
	fi,
	[AM_PATH_LIBGCRYPT([1.6.1], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])])
	AM_PATH_LIBGCRYPT($GCRYPT_REQ_VERSION,,[AC_MSG_ERROR([You need the gcrypt library.])])

	AC_MSG_CHECKING([if internal cryptsetup PBKDF2 is compiled-in])
	if test $use_internal_pbkdf2 = 0; then
	AC_MSG_RESULT([no])
	else
	AC_MSG_RESULT([yes])
	NO_FIPS([])
	fi

	if test x$enable_static_cryptsetup = xyes; then
	saved_LIBS=$LIBS
	LIBS="$saved_LIBS $LIBGCRYPT_LIBS -static"
	AC_CHECK_LIB(gcrypt, gcry_check_version,,
	AC_MSG_ERROR([Cannot find static gcrypt library.]),
	[-lgpg-error])
	LIBGCRYPT_STATIC_LIBS="$LIBGCRYPT_LIBS -lgpg-error"
	LIBS=$saved_LIBS
	fi

	CRYPTO_CFLAGS=$LIBGCRYPT_CFLAGS
	CRYPTO_LIBS=$LIBGCRYPT_LIBS
	CRYPTO_STATIC_LIBS=$LIBGCRYPT_STATIC_LIBS

	AC_DEFINE_UNQUOTED(GCRYPT_REQ_VERSION, ["$GCRYPT_REQ_VERSION"], [Requested gcrypt version])
	])

	AC_DEFUN([CONFIGURE_OPENSSL], [
	PKG_CHECK_MODULES([OPENSSL], [openssl >= 0.9.8],,
	AC_MSG_ERROR([You need openssl library.]))
	CRYPTO_CFLAGS=$OPENSSL_CFLAGS
	CRYPTO_LIBS=$OPENSSL_LIBS
	use_internal_pbkdf2=0

	if test x$enable_static_cryptsetup = xyes; then
	saved_PKG_CONFIG=$PKG_CONFIG
	PKG_CONFIG="$PKG_CONFIG --static"
	PKG_CHECK_MODULES([OPENSSL_STATIC], [openssl])
	CRYPTO_STATIC_LIBS=$OPENSSL_STATIC_LIBS
	PKG_CONFIG=$saved_PKG_CONFIG
	fi
	NO_FIPS([])
	])

	AC_DEFUN([CONFIGURE_NSS], [
	if test x$enable_static_cryptsetup = xyes; then
	AC_MSG_ERROR([Static build of cryptsetup is not supported with NSS.])
	fi

	AC_MSG_WARN([NSS backend does NOT provide backward compatibility (missing ripemd160 hash).])

	PKG_CHECK_MODULES([NSS], [nss],,
	AC_MSG_ERROR([You need nss library.]))

	saved_CFLAGS=$CFLAGS
	CFLAGS="$CFLAGS $NSS_CFLAGS"
	AC_CHECK_DECLS([NSS_GetVersion], [], [], [#include <nss.h>])
	CFLAGS=$saved_CFLAGS

	CRYPTO_CFLAGS=$NSS_CFLAGS
	CRYPTO_LIBS=$NSS_LIBS
	use_internal_pbkdf2=1
	NO_FIPS([])
	])

	AC_DEFUN([CONFIGURE_KERNEL], [
	AC_CHECK_HEADERS(linux/if_alg.h,,
	[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface.])])
	# AC_CHECK_DECLS([AF_ALG],,
	# [AC_MSG_ERROR([You need Linux kernel with userspace crypto interface.])],
	# [#include <sys/socket.h>])
	use_internal_pbkdf2=1
	NO_FIPS([])
	])

	AC_DEFUN([CONFIGURE_NETTLE], [
	AC_CHECK_HEADERS(nettle/sha.h,,
	[AC_MSG_ERROR([You need Nettle cryptographic library.])])

	saved_LIBS=$LIBS
	AC_CHECK_LIB(nettle, nettle_pbkdf2_hmac_sha256,,
	[AC_MSG_ERROR([You need Nettle library version 2.6 or more recent.])])
	CRYPTO_LIBS=$LIBS
	LIBS=$saved_LIBS

	CRYPTO_STATIC_LIBS=$CRYPTO_LIBS
	use_internal_pbkdf2=0
	NO_FIPS([])
	])

	dnl ==========================================================================
	saved_LIBS=$LIBS

	AC_ARG_ENABLE([static-cryptsetup],
	AS_HELP_STRING([--enable-static-cryptsetup],
	[enable build of static cryptsetup binary]))
	if test x$enable_static_cryptsetup = xyes; then
	if test x$enable_static = xno; then
	AC_MSG_WARN([Requested static cryptsetup build, enabling static library.])
	enable_static=yes
	fi
	fi
	AM_CONDITIONAL(STATIC_TOOLS, test x$enable_static_cryptsetup = xyes)

	AC_ARG_ENABLE(veritysetup,
	AS_HELP_STRING([--disable-veritysetup],
	[disable veritysetup support]),[], [enable_veritysetup=yes])
	AM_CONDITIONAL(VERITYSETUP, test x$enable_veritysetup = xyes)

	AC_ARG_ENABLE([cryptsetup-reencrypt],
	AS_HELP_STRING([--enable-cryptsetup-reencrypt],
	[enable cryptsetup-reencrypt tool]))
	AM_CONDITIONAL(REENCRYPT, test x$enable_cryptsetup_reencrypt = xyes)

	AC_ARG_ENABLE(selinux,
	AS_HELP_STRING([--disable-selinux],
	[disable selinux support [default=auto]]),[], [])

	AC_ARG_ENABLE([udev],
	AS_HELP_STRING([--disable-udev],
	[disable udev support]),[], enable_udev=yes)

	dnl Try to use pkg-config for devmapper, but fallback to old detection
	PKG_CHECK_MODULES([DEVMAPPER], [devmapper >= 1.02.03],, [
	AC_CHECK_LIB(devmapper, dm_task_set_name,,
	[AC_MSG_ERROR([You need the device-mapper library.])])
	AC_CHECK_LIB(devmapper, dm_task_set_message,,
	[AC_MSG_ERROR([The device-mapper library on your system is too old.])])
	DEVMAPPER_LIBS=$LIBS
	])
	LIBS=$saved_LIBS

	LIBS="$LIBS $DEVMAPPER_LIBS"
	AC_CHECK_DECLS([dm_task_secure_data], [], [], [#include <libdevmapper.h>])
	AC_CHECK_DECLS([dm_task_retry_remove], [], [], [#include <libdevmapper.h>])
	AC_CHECK_DECLS([DM_UDEV_DISABLE_DISK_RULES_FLAG], [have_cookie=yes], [have_cookie=no], [#include <libdevmapper.h>])
	if test "x$enable_udev" = xyes; then
	if test "x$have_cookie" = xno; then
	AC_MSG_WARN([The device-mapper library on your system has no udev support, udev support disabled.])
	else
	AC_DEFINE(USE_UDEV, 1, [Try to use udev synchronisation?])
	fi
	fi
	LIBS=$saved_LIBS

	dnl Crypto backend configuration.
	AC_ARG_WITH([crypto_backend],
	AS_HELP_STRING([--with-crypto_backend=BACKEND], [crypto backend (gcrypt/openssl/nss/kernel/nettle) [gcrypt]]),
	[], with_crypto_backend=gcrypt
	)

	dnl Kernel crypto API backend needed for benchmark and tcrypt
	AC_ARG_ENABLE([kernel_crypto], AS_HELP_STRING([--disable-kernel_crypto],
	[disable kernel userspace crypto (no benchmark and tcrypt)]),
	[with_kernel_crypto=$enableval],
	[with_kernel_crypto=yes])

	if test "x$with_kernel_crypto" = "xyes"; then
	AC_CHECK_HEADERS(linux/if_alg.h,,
	[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface. (Or use --disable-kernel_crypto.)])])
	AC_DEFINE(ENABLE_AF_ALG, 1, [Enable using of kernel userspace crypto])
	fi

	case $with_crypto_backend in
	gcrypt) CONFIGURE_GCRYPT([]) ;;
	openssl) CONFIGURE_OPENSSL([]) ;;
	nss) CONFIGURE_NSS([]) ;;
	kernel) CONFIGURE_KERNEL([]) ;;
	nettle) CONFIGURE_NETTLE([]) ;;
	*) AC_MSG_ERROR([Unknown crypto backend.]) ;;
	esac
	AM_CONDITIONAL(CRYPTO_BACKEND_GCRYPT, test $with_crypto_backend = gcrypt)
	AM_CONDITIONAL(CRYPTO_BACKEND_OPENSSL, test $with_crypto_backend = openssl)
	AM_CONDITIONAL(CRYPTO_BACKEND_NSS, test $with_crypto_backend = nss)
	AM_CONDITIONAL(CRYPTO_BACKEND_KERNEL, test $with_crypto_backend = kernel)
	AM_CONDITIONAL(CRYPTO_BACKEND_NETTLE, test $with_crypto_backend = nettle)

	AM_CONDITIONAL(CRYPTO_INTERNAL_PBKDF2, test $use_internal_pbkdf2 = 1)
	AC_DEFINE_UNQUOTED(USE_INTERNAL_PBKDF2, [$use_internal_pbkdf2], [Use internal PBKDF2])

	dnl Magic for cryptsetup.static build.
	if test x$enable_static_cryptsetup = xyes; then
	saved_PKG_CONFIG=$PKG_CONFIG
	PKG_CONFIG="$PKG_CONFIG --static"

	LIBS="$saved_LIBS -static"
	AC_CHECK_LIB(popt, poptGetContext,,
	AC_MSG_ERROR([Cannot find static popt library.]))

	dnl Try to detect needed device-mapper static libraries, try pkg-config first.
	LIBS="$saved_LIBS -static"
	PKG_CHECK_MODULES([DEVMAPPER_STATIC], [devmapper >= 1.02.27],,[
	DEVMAPPER_STATIC_LIBS=$DEVMAPPER_LIBS
	if test "x$enable_selinux" != xno; then
	AC_CHECK_LIB(sepol, sepol_bool_set)
	AC_CHECK_LIB(selinux, is_selinux_enabled)
	DEVMAPPER_STATIC_LIBS="$DEVMAPPER_STATIC_LIBS $LIBS"
	fi
	])
	LIBS="$saved_LIBS $DEVMAPPER_STATIC_LIBS"
	AC_CHECK_LIB(devmapper, dm_task_set_uuid,,
	AC_MSG_ERROR([Cannot link with static device-mapper library.]))

	dnl Try to detect uuid static library.
	LIBS="$saved_LIBS -static"
	AC_CHECK_LIB(uuid, uuid_generate,,
	AC_MSG_ERROR([Cannot find static uuid library.]))

	LIBS=$saved_LIBS
	PKG_CONFIG=$saved_PKG_CONFIG
	fi

	AC_SUBST([DEVMAPPER_LIBS])
	AC_SUBST([DEVMAPPER_STATIC_LIBS])

	AC_SUBST([PWQUALITY_LIBS])
	AC_SUBST([PWQUALITY_STATIC_LIBS])

	AC_SUBST([PASSWDQC_LIBS])

	AC_SUBST([CRYPTO_CFLAGS])
	AC_SUBST([CRYPTO_LIBS])
	AC_SUBST([CRYPTO_STATIC_LIBS])

	AC_SUBST([LIBCRYPTSETUP_VERSION])
	AC_SUBST([LIBCRYPTSETUP_VERSION_INFO])

	dnl ==========================================================================
	AC_ARG_ENABLE([dev-random], AS_HELP_STRING([--enable-dev-random],
	[use blocking /dev/random by default for key generator (otherwise use /dev/urandom)]),
	[default_rng=/dev/random], [default_rng=/dev/urandom])
	AC_DEFINE_UNQUOTED(DEFAULT_RNG, ["$default_rng"], [default RNG type for key generator])

	dnl ==========================================================================
	AC_DEFUN([CS_DEFINE],
	[AC_DEFINE_UNQUOTED(DEFAULT_[]m4_translit([$1], [-a-z], [_A-Z]), [$2], [$3])
	])

	AC_DEFUN([CS_STR_WITH], [AC_ARG_WITH([$1],
	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
	[CS_DEFINE([$1], ["$withval"], [$2])],
	[CS_DEFINE([$1], ["$3"], [$2])]
	)])

	AC_DEFUN([CS_NUM_WITH], [AC_ARG_WITH([$1],
	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
	[CS_DEFINE([$1], [$withval], [$2])],
	[CS_DEFINE([$1], [$3], [$2])]
	)])

	dnl ==========================================================================
	dnl Python bindings
	AC_ARG_ENABLE([python], AS_HELP_STRING([--enable-python],[enable Python bindings]),
	[with_python=$enableval],
	[with_python=no])

	AC_ARG_WITH([python_version],
	AS_HELP_STRING([--with-python_version=VERSION], [required Python version [2.6]]),
	[PYTHON_VERSION=$withval], [PYTHON_VERSION=2.6])

	if test "x$with_python" = "xyes"; then
	AM_PATH_PYTHON([$PYTHON_VERSION])

	AC_PATH_PROGS([PYTHON_CONFIG], [python${PYTHON_VERSION}-config python-config], [no])
	if test "${PYTHON_CONFIG}" = "no"; then
	AC_MSG_ERROR([cannot find python${PYTHON_VERSION}-config or python-config in PATH])
	fi

	AC_MSG_CHECKING(for python headers using $PYTHON_CONFIG --includes)
	PYTHON_INCLUDES=$($PYTHON_CONFIG --includes)
	AC_MSG_RESULT($PYTHON_INCLUDES)
	AC_SUBST(PYTHON_INCLUDES)

	AC_MSG_CHECKING(for python libraries using $PYTHON_CONFIG --libs)
	PYTHON_LIBS=$($PYTHON_CONFIG --libs)
	AC_MSG_RESULT($PYTHON_LIBS)
	AC_SUBST(PYTHON_LIBS)
	fi
	AM_CONDITIONAL([PYTHON_CRYPTSETUP], [test "x$with_python" = "xyes"])

	dnl ==========================================================================
	CS_STR_WITH([plain-hash], [password hashing function for plain mode], [ripemd160])
	CS_STR_WITH([plain-cipher], [cipher for plain mode], [aes])
	CS_STR_WITH([plain-mode], [cipher mode for plain mode], [cbc-essiv:sha256])
	CS_NUM_WITH([plain-keybits],[key length in bits for plain mode], [256])

	CS_STR_WITH([luks1-hash], [hash function for LUKS1 header], [sha256])
	CS_STR_WITH([luks1-cipher], [cipher for LUKS1], [aes])
	CS_STR_WITH([luks1-mode], [cipher mode for LUKS1], [xts-plain64])
	CS_NUM_WITH([luks1-keybits],[key length in bits for LUKS1], [256])
	CS_NUM_WITH([luks1-iter-time],[PBKDF2 iteration time for LUKS1 (in ms)], [2000])

	CS_STR_WITH([loopaes-cipher], [cipher for loop-AES mode], [aes])
	CS_NUM_WITH([loopaes-keybits],[key length in bits for loop-AES mode], [256])

	CS_NUM_WITH([keyfile-size-maxkb],[maximum keyfile size (in KiB)], [8192])
	CS_NUM_WITH([passphrase-size-max],[maximum keyfile size (in characters)], [512])

	CS_STR_WITH([verity-hash], [hash function for verity mode], [sha256])
	CS_NUM_WITH([verity-data-block], [data block size for verity mode], [4096])
	CS_NUM_WITH([verity-hash-block], [hash block size for verity mode], [4096])
	CS_NUM_WITH([verity-salt-size], [salt size for verity mode], [32])
	CS_NUM_WITH([verity-fec-roots], [parity bytes for verity FEC], [2])

	dnl ==========================================================================

	AC_CONFIG_FILES([ Makefile
	lib/Makefile
	lib/libcryptsetup.pc
	lib/crypto_backend/Makefile
	lib/luks1/Makefile
	lib/loopaes/Makefile
	lib/verity/Makefile
	lib/tcrypt/Makefile
	src/Makefile
	po/Makefile.in
	man/Makefile
	tests/Makefile
	python/Makefile
	])
	AC_OUTPUT