2 dnl # Supported configure options. When no options are specified support
3 dnl # for ZFS OSDs will be autodetected assuming server support is enabled.
4 dnl # If the ZFS OSD cannot be built support for it is disabled and a
5 dnl # warning is issued but the configure process is allowed to continue.
7 dnl # --without-zfs - Disable zfs support.
10 dnl # --with-zfs - Enable zfs support and attempt to autodetect the zfs
11 dnl # --with-zfs=yes headers in one of the following places. Because zfs
12 dnl # support was explicitly required if the headers cannot
13 dnl # be located it is treated as a fatal error.
15 dnl # * /var/lib/dkms/zfs/${VERSION}/source
16 dnl # * /usr/src/zfs-${VERSION}/${LINUXRELEASE}
17 dnl # * /usr/src/zfs-${VERSION}
21 dnl # --with-zfs-devel=path
22 dnl # - User provided directory where zfs development headers
23 dnl # are located. This option is typically used when user
24 dnl # uses rpm2cpio to unpack src rpm.
25 dnl # Assumes layout of:
26 dnl # ${zfs-devel-path}/usr/include/libzfs
27 dnl # ${zfs-devel-path}/usr/include/libspl
28 dnl # ${zfs-devel-path}/lib64/libzfs.so.* or
29 dnl # ${zfs-devel-path}/lib/libzfs.so.*
31 dnl # --with-zfs=path - Enable zfs support and use the zfs headers in the
32 dnl # provided path. No autodetection is performed and
33 dnl # if no headers are found this is a fatal error.
35 dnl # --with-zfs-obj - When zfs support is enabled the object directory
36 dnl # will be based on the --with-zfs directory. If this
37 dnl # is detected incorrectly it can be explicitly
38 dnl # specified using this option.
40 dnl # --without-spl - Disable spl support.
43 dnl # --with-spl - Enable spl support and attempt to autodetect the spl
44 dnl # --with-spl=yes headers in one of the following places in this order:
45 dnl # * /var/lib/dkms/spl/${VERSION}/source
46 dnl # * /usr/src/spl-${VERSION}/${LINUXRELEASE}
47 dnl # * /usr/src/spl-${VERSION}
51 dnl # --with-spl=path - Enable spl support and use the spl headers in the
52 dnl # provided path. No autodetection is performed.
54 dnl # --with-spl-obj - When spl support is enabled the object directory
55 dnl # will be based on the --with-spl directory. If this
56 dnl # is detected incorrectly it can be explicitly
57 dnl # specified using this option.
61 AS_HELP_STRING([--with-spl=PATH],
62 [Path to spl source]),
65 AC_ARG_WITH([spl-obj],
66 AS_HELP_STRING([--with-spl-obj=PATH],
67 [Path to spl build objects]),
71 dnl # The existence of spl.release[.in] is used to identify a valid
72 dnl # source directory. In order of preference:
74 splver=$(ls -1 /usr/src/ | grep -m1 spl | cut -f2 -d'-')
75 spldkms="/var/lib/dkms/spl/${splver}"
76 splsrc1="/usr/src/spl-${splver}/${LINUXRELEASE}"
77 splsrc2="/usr/src/spl-${splver}"
81 AC_MSG_CHECKING([spl source directory])
82 AS_IF([test -z "${splsrc}"], [
83 AS_IF([test -e "${spldkms}/source/spl.release.in"], [
84 splsrc=${spldkms}/source
85 ], [test -e "${splsrc1}/spl.release.in"], [
87 ], [test -e "${splsrc2}/spl.release.in"], [
89 ], [test -e "${splsrc3}/spl.release.in"], [
90 splsrc=$(readlink -f "${splsrc3}")
91 ], [test -e "${splsrc4}/spl.release.in"], [
97 AC_MSG_RESULT([$splsrc])
99 AS_IF([test ! -e "$splsrc/spl.release" &&
100 test ! -e "$splsrc/spl.release.in"], [
105 dnl # The existence of the spl_config.h is used to identify a valid
106 dnl # spl object directory. In many cases the object and source
107 dnl # directory are the same, however the objects may also reside
108 dnl # is a subdirectory named after the kernel version. When
109 dnl # weak modules are used, the kernel version may not be the
110 dnl # same as the LINUXRELEASE against which we are building lustre.
112 AC_MSG_CHECKING([spl build directory])
113 AS_IF([test -z "$splobj"], [
114 last_spl_obj_dir=$(ls -d ${splsrc}/[[0-9]]*/ | tail -n 1 | sed 's|/$||')
115 AS_IF([test "${splsrc}" = "${spldkms}/source"], [
116 AS_IF([test -e "${spldkms}/${LINUXRELEASE}/${target_cpu}/spl_config.h"], [
117 splobj=${spldkms}/${LINUXRELEASE}/${target_cpu}
121 ],[test -e "${splsrc}/${LINUXRELEASE}/spl_config.h"], [
122 splobj="${splsrc}/${LINUXRELEASE}"
123 ], [test -e "${splsrc}/spl_config.h"], [
125 ], [test -e "${last_spl_obj_dir}/spl_config.h"], [
126 splobj="${last_spl_obj_dir}"
131 AC_MSG_RESULT([$splobj])
133 AS_IF([test ! -e "$splobj/spl_config.h"], [
138 dnl # Verify the source version using SPL_META_VERSION in spl_config.h
140 AS_IF([test x$enable_zfs = xyes], [
141 AC_MSG_CHECKING([spl source version])
142 AS_IF([fgrep -q SPL_META_VERSION $splobj/spl_config.h], [
143 splver=$((echo "#include <spl_config.h>";
144 echo "splver=SPL_META_VERSION-SPL_META_RELEASE") |
146 grep "^splver=" | tr -d \" | cut -d= -f2)
151 AC_MSG_RESULT([$splver])
155 dnl # Verify the modules systems exist by the expect name.
157 AS_IF([test x$enable_zfs = xyes], [
158 AC_MSG_CHECKING([spl file name for module symbols])
159 AS_IF([test -r $splobj/$SYMVERFILE], [
161 EXTRA_SYMBOLS="$EXTRA_SYMBOLS $splobj/$SYMVERFILE"
162 ], [test -r $splobj/module/$SYMVERFILE], [
164 EXTRA_SYMBOLS="$EXTRA_SYMBOLS $splobj/module/$SYMVERFILE"
169 AC_MSG_RESULT([$splsym])
174 SPL_VERSION=${splver}
178 AC_SUBST(SPL_VERSION)
179 AC_SUBST(EXTRA_SYMBOLS)
183 AC_ARG_WITH([zfs-obj],
184 AS_HELP_STRING([--with-zfs-obj=PATH],
185 [Path to zfs build objects]),
189 dnl # The existence of zfs.release[.in] is used to identify a valid
190 dnl # source directory. In order of preference:
192 zfsver=$(ls -1 /usr/src/ | grep -m1 zfs | cut -f2 -d'-')
193 zfsdkms="/var/lib/dkms/zfs/${zfsver}"
194 zfssrc1="/usr/src/zfs-${zfsver}/${LINUXRELEASE}"
195 zfssrc2="/usr/src/zfs-${zfsver}"
199 AC_MSG_CHECKING([zfs source directory])
200 AS_IF([test -z "${zfssrc}"], [
201 AS_IF([test -e "${zfsdkms}/source/zfs.release.in"], [
202 zfssrc=${zfsdkms}/source
203 ], [test -e "${zfssrc1}/zfs.release.in"], [
205 ], [test -e "${zfssrc2}/zfs.release.in"], [
207 ], [test -e "${zfssrc3}/zfs.release.in"], [
208 zfssrc=$(readlink -f "${zfssrc3}")
209 ], [test -e "${zfssrc4}/zfs.release.in"], [
215 AC_MSG_RESULT([$zfssrc])
217 AS_IF([test ! -e "$zfssrc/zfs.release.in" &&
218 test ! -e "$zfssrc/zfs.release"], [
223 dnl # The existence of the zfs_config.h is used to identify a valid
224 dnl # zfs object directory. In many cases the object and source
225 dnl # directory are the same, however the objects may also reside
226 dnl # is a subdirectory named after the kernel version. When
227 dnl # weak modules are used, the kernel version may not be the
228 dnl # same as the LINUXRELEASE against which we are building lustre.
230 AC_MSG_CHECKING([zfs build directory])
231 AS_IF([test -z "$zfsobj"], [
232 last_zfs_obj_dir=$(ls -d ${zfssrc}/[[0-9]]*/ | tail -n 1 | sed 's|/$||')
233 AS_IF([test "${zfssrc}" = "${zfsdkms}/source"], [
234 AS_IF([test -e "${zfsdkms}/${LINUXRELEASE}/${target_cpu}/zfs_config.h"], [
235 zfsobj=${zfsdkms}/${LINUXRELEASE}/${target_cpu}
239 ], [test -e "${zfssrc}/${LINUXRELEASE}/zfs_config.h"], [
240 zfsobj="${zfssrc}/${LINUXRELEASE}"
241 ], [test -e "${zfssrc}/zfs_config.h"], [
243 ], [test -e "${last_zfs_obj_dir}/zfs_config.h"], [
244 zfsobj="${last_zfs_obj_dir}"
250 AC_MSG_RESULT([$zfsobj])
251 AS_IF([test ! -e "$zfsobj/zfs_config.h"], [
256 dnl # Verify the source version using SPL_META_VERSION in spl_config.h
258 AS_IF([test x$enable_zfs = xyes], [
259 AC_MSG_CHECKING([zfs source version])
260 AS_IF([fgrep -q ZFS_META_VERSION $zfsobj/zfs_config.h], [
261 zfsver=$((echo "#include <zfs_config.h>";
262 echo "zfsver=ZFS_META_VERSION-ZFS_META_RELEASE") |
264 grep "^zfsver=" | tr -d \" | cut -d= -f2)
269 AC_MSG_RESULT([$zfsver])
273 dnl # Verify the modules systems exist by the expect name.
275 AS_IF([test x$enable_zfs = xyes], [
276 AC_MSG_CHECKING([zfs file name for module symbols])
277 AS_IF([test -r $zfsobj/$SYMVERFILE], [
279 EXTRA_SYMBOLS="$EXTRA_SYMBOLS $zfsobj/$SYMVERFILE"
280 ], [test -r $zfsobj/module/$SYMVERFILE], [
282 EXTRA_SYMBOLS="$EXTRA_SYMBOLS $zfsobj/module/$SYMVERFILE"
287 AC_MSG_RESULT([$zfssym])
292 ZFS_VERSION=${zfsver}
296 AC_SUBST(ZFS_VERSION)
297 AC_SUBST(EXTRA_SYMBOLS)
300 AC_DEFUN([LB_ZFS_DEVEL], [
301 AC_ARG_WITH([zfs-devel],
302 [AS_HELP_STRING([--with-zfs-devel=PATH],
303 [Path to zfs development headers])],
304 [zfsdevel="$withval"])
306 AC_MSG_CHECKING([user provided zfs devel headers])
307 AS_IF([test ! -z "${zfsdevel}"], [
308 AS_IF([test -d "${zfsdevel}/usr/include/libspl" && test -d "${zfsdevel}/usr/include/libzfs"], [
309 zfsinc="-I $zfsdevel/usr/include/libspl -I $zfsdevel/usr/include/libzfs"
310 zfslib="-L$zfsdevel/usr/lib64 -L$zfsdevel/usr/lib -L$zfsdevel/lib64 -L$zfsdevel/lib"
312 AC_MSG_ERROR([Path to development headers directory does not exist])
315 AC_MSG_RESULT([$zfsinc])
318 AC_DEFUN([LB_ZFS_USER], [
320 dnl # Detect user space zfs development headers.
322 AC_MSG_CHECKING([zfs devel headers])
323 AS_IF([test -z "${zfsinc}"], [
324 AS_IF([test -e "${zfssrc}/include/libzfs.h" && test -e "${zfssrc}/lib/libspl/include"], [
325 zfsinc="-I $zfssrc/lib/libspl/include -I $zfssrc/include"
326 zfslib="-L$zfssrc/lib/libzfs/.libs/ -L$zfssrc/lib/libnvpair/.libs"
327 ], [test -d /usr/include/libzfs && test -d /usr/include/libspl], [
328 zfsinc="-I/usr/include/libspl -I /usr/include/libzfs"
336 AC_MSG_RESULT([$zfsinc])
338 ZFS_LIBZFS_INCLUDE=${zfsinc}
339 ZFS_LIBZFS_LDFLAGS=${zfslib}
340 ZFS_LIBZFS_LIBS="-lzfs -lnvpair"
341 AC_SUBST(ZFS_LIBZFS_INCLUDE)
342 AC_SUBST(ZFS_LIBZFS_LDFLAGS)
343 AC_SUBST(ZFS_LIBZFS_LIBS)
346 AC_DEFUN([LB_CONFIG_ZFS], [
348 [AS_HELP_STRING([--with-zfs=PATH], [Path to zfs source])],
350 AS_IF([test x$withval = xno], [
353 ], [test x$withval = xyes], [
362 AS_IF([test x$enable_server != xno], [
371 AC_MSG_CHECKING([whether to enable zfs])
372 AC_MSG_RESULT([$enable_zfs])
374 AS_IF([test x$enable_zfs = xyes], [
375 AS_IF([test x$enable_modules = xyes], [
383 dnl # enable_zfs will be set to no in LB_SPL or LB_ZFS if
384 dnl # one of more of the build requirements is not met.
386 AS_IF([test x$enable_zfs = xyes], [
387 AC_DEFINE(HAVE_ZFS_OSD, 1, Enable zfs osd)
389 AS_IF([test x$require_zfs = xyes], [
392 Required zfs osd cannot be built due to missing zfs development headers.
394 Support for zfs can be enabled by downloading the required packages for your
395 distribution. See http://zfsonlinux.org/ to determine is zfs is supported by
401 Disabling optional zfs osd due to missing development headers.
403 Support for zfs can be enabled by downloading the required packages for your
404 distribution. See http://zfsonlinux.org/ to determine is zfs is supported by
412 dnl # Define zfs source code version
414 AS_IF([test x$enable_zfs = xyes], [
415 ZFS_MAJOR=$(echo $zfsver | sed -re ['s/([0-9]+)\.([0-9]+)\.([0-9]+)(\.([0-9]+))?.*/\1/'])
416 ZFS_MINOR=$(echo $zfsver | sed -re ['s/([0-9]+)\.([0-9]+)\.([0-9]+)(\.([0-9]+))?.*/\2/'])
417 ZFS_PATCH=$(echo $zfsver | sed -re ['s/([0-9]+)\.([0-9]+)\.([0-9]+)(\.([0-9]+))?.*/\3/'])
418 ZFS_FIX=$(echo $zfsver | sed -re ['s/([0-9]+)\.([0-9]+)\.([0-9]+)(\.([0-9]+))?.*/\5/'])
419 AS_IF([test -z "$ZFS_FIX"], [ZFS_FIX="0"])
421 AC_DEFINE_UNQUOTED([ZFS_MAJOR], [$ZFS_MAJOR], [zfs major version])
422 AC_DEFINE_UNQUOTED([ZFS_MINOR], [$ZFS_MINOR], [zfs minor version])
423 AC_DEFINE_UNQUOTED([ZFS_PATCH], [$ZFS_PATCH], [zfs patch version])
424 AC_DEFINE_UNQUOTED([ZFS_FIX], [$ZFS_FIX], [zfs fix version])
427 AS_IF([test "x$enable_zfs" = xyes], [
428 LB_CHECK_COMPILE([if zfs defines dsl_pool_config_enter/exit],
429 dsl_pool_config_enter, [
430 #include <sys/dsl_pool.h>
432 dsl_pool_config_enter(NULL, FTAG);
434 AC_DEFINE(HAVE_DSL_POOL_CONFIG, 1,
435 [Have dsl_pool_config_enter/exit in ZFS])
437 LB_CHECK_COMPILE([if zfs defines dsl_sync_task_do_nowait],
438 dsl_sync_task_do_nowait, [
439 #include <sys/dsl_synctask.h>
441 dsl_sync_task_do_nowait(NULL, NULL, NULL, NULL, NULL, 0, NULL);
443 AC_DEFINE(HAVE_DSL_SYNC_TASK_DO_NOWAIT, 1,
444 [Have dsl_sync_task_do_nowait in ZFS])
446 LB_CHECK_COMPILE([if zfs defines sa_spill_alloc],
448 #include <sys/kmem.h>
453 ptr = sa_spill_alloc(KM_SLEEP);
456 AC_DEFINE(HAVE_SA_SPILL_ALLOC, 1,
457 [Have sa_spill_alloc in ZFS])
459 LB_CHECK_COMPILE([if zfs defines spa_maxblocksize],
466 size = spa_maxblocksize(spa);
468 AC_DEFINE(HAVE_SPA_MAXBLOCKSIZE, 1,
469 [Have spa_maxblocksize in ZFS])
473 dnl # ZFS 0.7.x adds support for large dnodes. This
474 dnl # allows Lustre to optionally specify the size of a
475 dnl # dnode which ZFS will then use to store metadata such
476 dnl # as xattrs. The default dnode size specified by the
477 dnl # 'dnodesize' dataset property will be used unless a
478 dnl # specific value is provided.
480 LB_CHECK_COMPILE([if zfs defines dmu_object_alloc_dnsize],
481 dmu_object_alloc_dnsize, [
483 #include <sys/dnode.h>
486 dmu_object_type_t objtype = DMU_OT_NONE;
488 dmu_object_type_t bonustype = DMU_OT_SA;
489 int dnodesize = DNODE_MIN_SIZE;
493 id = dmu_object_alloc_dnsize(os, objtype, blocksize,
495 DN_BONUS_SIZE(dnodesize),
498 AC_DEFINE(HAVE_DMU_OBJECT_ALLOC_DNSIZE, 1,
499 [Have dmu_object_alloc_dnsize in ZFS])
503 dnl # ZFS 0.7.x extended dmu_prefetch() to take an additional
504 dnl # 'level' and 'priority' argument. Use a level of 0 and a
505 dnl # priority of ZIO_PRIORITY_SYNC_READ to replicate the
506 dnl # behavior of the four argument version.
508 LB_CHECK_COMPILE([if ZFS has 'dmu_prefetch' with 6 args],
517 enum zio_priority pri = ZIO_PRIORITY_SYNC_READ;
519 dmu_prefetch(os, object, level, offset, len, pri);
521 AC_DEFINE(HAVE_DMU_PREFETCH_6ARG, 1,
522 [Have 6 argument dmu_pretch in ZFS])
525 dnl # ZFS 0.7.0 feature: SPA_FEATURE_USEROBJ_ACCOUNTING
527 LB_CHECK_COMPILE([if ZFS has native dnode accounting supported],
528 dmu_objset_userobjused_enabled, [
529 #include <sys/dmu_objset.h>
531 dmu_objset_userobjused_enabled(NULL);
533 AC_DEFINE(HAVE_DMU_USEROBJ_ACCOUNTING, 1,
534 [Have native dnode accounting in ZFS])
537 dnl # ZFS 0.7.0 feature: MULTIHOST
539 LB_CHECK_COMPILE([if ZFS has multihost protection],
545 AC_DEFINE(HAVE_ZFS_MULTIHOST, 1,
546 [Have multihost protection in ZFS])
549 dnl # ZFS 0.7.x adds new method zap_lookup_by_dnode
551 LB_CHECK_COMPILE([if ZFS has 'zap_lookup_by_dnode'],
552 zap_lookup_by_dnode, [
554 #include <sys/dnode.h>
557 zap_lookup_by_dnode(dn, NULL, 1, 1, NULL);
559 AC_DEFINE(HAVE_ZAP_LOOKUP_BY_DNODE, 1,
560 [Have zap_lookup_by_dnode() in ZFS])
563 dnl # ZFS 0.7.x adds new method zap_add_by_dnode
565 LB_CHECK_COMPILE([if ZFS has 'zap_add_by_dnode'],
568 #include <sys/dnode.h>
571 zap_add_by_dnode(dn, NULL, 1, 1, NULL, NULL);
573 AC_DEFINE(HAVE_ZAP_ADD_BY_DNODE, 1,
574 [Have zap_add_by_dnode() in ZFS])
577 dnl # ZFS 0.7.x adds new method zap_remove_by_dnode
579 LB_CHECK_COMPILE([if ZFS has 'zap_remove_by_dnode'],
580 zap_remove_by_dnode, [
582 #include <sys/dnode.h>
585 zap_remove_by_dnode(dn, NULL, NULL);
587 AC_DEFINE(HAVE_ZAP_REMOVE_ADD_BY_DNODE, 1,
588 [Have zap_remove_by_dnode() in ZFS])
591 dnl # ZFS 0.7.x adds new method dmu_tx_hold_zap_by_dnode
593 LB_CHECK_COMPILE([if ZFS has 'dmu_tx_hold_zap_by_dnode'],
594 dmu_tx_hold_zap_by_dnode, [
596 #include <sys/dnode.h>
599 dmu_tx_hold_zap_by_dnode(NULL, dn, TRUE, NULL);
601 AC_DEFINE(HAVE_DMU_TX_HOLD_ZAP_BY_DNODE, 1,
602 [Have dmu_tx_hold_zap_by_dnode() in ZFS])
605 dnl # ZFS 0.7.x adds new method dmu_tx_hold_write_by_dnode
607 LB_CHECK_COMPILE([if ZFS has 'dmu_tx_hold_write_by_dnode'],
608 dmu_tx_hold_write_by_dnode, [
610 #include <sys/dnode.h>
613 dmu_tx_hold_write_by_dnode(NULL, dn, 0, 0);
615 AC_DEFINE(HAVE_DMU_TX_HOLD_WRITE_BY_DNODE, 1,
616 [Have dmu_tx_hold_write_by_dnode() in ZFS])
619 dnl # ZFS 0.7.x adds new method dmu_write_by_dnode
621 LB_CHECK_COMPILE([if ZFS has 'dmu_write_by_dnode'],
622 dmu_write_by_dnode, [
624 #include <sys/dnode.h>
627 dmu_write_by_dnode(dn, 0, 0, NULL, NULL);
629 AC_DEFINE(HAVE_DMU_WRITE_BY_DNODE, 1,
630 [Have dmu_write_by_dnode() in ZFS])
633 dnl # ZFS 0.7.x adds new method dmu_read_by_dnode
635 LB_CHECK_COMPILE([if ZFS has 'dmu_read_by_dnode'],
638 #include <sys/dnode.h>
641 dmu_read_by_dnode(dn, 0, 0, NULL, 0);
643 AC_DEFINE(HAVE_DMU_READ_BY_DNODE, 1,
644 [Have dmu_read_by_dnode() in ZFS])
647 dnl # ZFS 0.7.2 adds new method dmu_tx_mark_netfree
649 LB_CHECK_COMPILE([if ZFS has 'dmu_tx_mark_netfree'],
650 dmu_tx_mark_netfree, [
654 dmu_tx_mark_netfree(tx);
656 AC_DEFINE(HAVE_DMU_TX_MARK_NETFREE, 1,
657 [Have dmu_tx_mark_netfree])
660 dnl # ZFS 0.7.10 changes timestruc_t to inode_timespec_t
662 LB_CHECK_COMPILE([if SPL has 'inode_timespec_t'],
663 zfs_have_inode_timespec, [
664 #include <sys/fs/zfs.h>
666 inode_timespec_t now;
669 AC_DEFINE(HAVE_ZFS_INODE_TIMESPEC, 1,
670 [Have inode_timespec_t])
672 dnl # ZFS 0.7.12/0.8.x uses zfs_refcount_add() instead of
673 dnl # refcount_add().
675 LB_CHECK_COMPILE([if ZFS has 'zfs_refcount_add'],
677 #include <sys/refcount.h>
679 zfs_refcount_add((zfs_refcount_t *) NULL, NULL);
681 AC_DEFINE(HAVE_ZFS_REFCOUNT_ADD, 1,
682 [Have zfs_refcount_add])
685 dnl # ZFS 0.8.x changes dmu_objset_own for encryption
687 LB_CHECK_COMPILE([if ZFS has 'dmu_objset_own' with 6 args],
689 #include <sys/dmu_objset.h>
692 dmu_objset_type_t type = DMU_OST_ANY;
693 dmu_objset_own(NULL, type, B_FALSE, B_TRUE, FTAG, &os);
695 AC_DEFINE(HAVE_DMU_OBJSET_OWN_6ARG, 1,
696 [Have dmu_objset_own() with 6 args])
699 dnl # ZFS 0.8.x changes dmu_objset_disown for encryption
701 LB_CHECK_COMPILE([if ZFS has 'dmu_objset_disown' with 3 args],
703 #include <sys/dmu_objset.h>
706 dmu_objset_disown(os, B_TRUE, FTAG);
708 AC_DEFINE(HAVE_DMU_OBJSET_DISOWN_3ARG, 1,
709 [Have dmu_objset_disown() with 3 args])
713 AS_IF([test "x$enable_zfs" = xyes], [
714 AC_SUBST(ENABLE_ZFS, yes)
716 AC_SUBST(ENABLE_ZFS, no)
718 AM_CONDITIONAL(ZFS_ENABLED, [test "x$enable_zfs" = xyes])