2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
9 ZFS_AC_KERNEL_DECLARE_EVENT_CLASS
10 ZFS_AC_KERNEL_CURRENT_BIO_TAIL
11 ZFS_AC_KERNEL_SUBMIT_BIO
12 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
13 ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
14 ZFS_AC_KERNEL_TYPE_FMODE_T
15 ZFS_AC_KERNEL_KOBJ_NAME_LEN
16 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
17 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
18 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
19 ZFS_AC_KERNEL_LOOKUP_BDEV
20 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
21 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
22 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
23 ZFS_AC_KERNEL_BIO_BVEC_ITER
24 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
25 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
26 ZFS_AC_KERNEL_REQ_OP_DISCARD
27 ZFS_AC_KERNEL_REQ_OP_SECURE_ERASE
28 ZFS_AC_KERNEL_REQ_OP_FLUSH
29 ZFS_AC_KERNEL_BIO_BI_OPF
30 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
31 ZFS_AC_KERNEL_BIO_RW_BARRIER
32 ZFS_AC_KERNEL_BIO_RW_DISCARD
33 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
34 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
35 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
36 ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BIO_RW_UNPLUG
37 ZFS_AC_KERNEL_BLK_QUEUE_HAVE_BLK_PLUG
38 ZFS_AC_KERNEL_GET_DISK_RO
39 ZFS_AC_KERNEL_GET_GENDISK
40 ZFS_AC_KERNEL_HAVE_BIO_SET_OP_ATTRS
41 ZFS_AC_KERNEL_GENERIC_READLINK_GLOBAL
42 ZFS_AC_KERNEL_DISCARD_GRANULARITY
43 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
44 ZFS_AC_KERNEL_XATTR_HANDLER_NAME
45 ZFS_AC_KERNEL_XATTR_HANDLER_GET
46 ZFS_AC_KERNEL_XATTR_HANDLER_SET
47 ZFS_AC_KERNEL_XATTR_HANDLER_LIST
48 ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
49 ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS
50 ZFS_AC_KERNEL_POSIX_ACL_RELEASE
51 ZFS_AC_KERNEL_SET_CACHED_ACL_USABLE
52 ZFS_AC_KERNEL_POSIX_ACL_CHMOD
53 ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
54 ZFS_AC_KERNEL_POSIX_ACL_VALID_WITH_NS
55 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION
56 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION_WITH_NAMEIDATA
57 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL
58 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL_WITH_FLAGS
59 ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL
60 ZFS_AC_KERNEL_INODE_OPERATIONS_SET_ACL
61 ZFS_AC_KERNEL_GET_ACL_HANDLE_CACHE
62 ZFS_AC_KERNEL_SHOW_OPTIONS
63 ZFS_AC_KERNEL_FILE_INODE
65 ZFS_AC_KERNEL_EVICT_INODE
66 ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS
67 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
68 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
69 ZFS_AC_KERNEL_FALLOCATE
70 ZFS_AC_KERNEL_AIO_FSYNC
71 ZFS_AC_KERNEL_MKDIR_UMODE_T
72 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
73 ZFS_AC_KERNEL_CREATE_NAMEIDATA
74 ZFS_AC_KERNEL_GET_LINK
75 ZFS_AC_KERNEL_PUT_LINK
76 ZFS_AC_KERNEL_TRUNCATE_RANGE
77 ZFS_AC_KERNEL_AUTOMOUNT
78 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
79 ZFS_AC_KERNEL_COMMIT_METADATA
80 ZFS_AC_KERNEL_CLEAR_INODE
81 ZFS_AC_KERNEL_SETATTR_PREPARE
82 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
83 ZFS_AC_KERNEL_D_MAKE_ROOT
84 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
85 ZFS_AC_KERNEL_D_PRUNE_ALIASES
86 ZFS_AC_KERNEL_D_SET_D_OP
87 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
88 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
89 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
90 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
91 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
92 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
93 ZFS_AC_KERNEL_MOUNT_NODEV
95 ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID
96 ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD
98 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
99 ZFS_AC_KERNEL_SET_NLINK
100 ZFS_AC_KERNEL_ELEVATOR_CHANGE
101 ZFS_AC_KERNEL_5ARG_SGET
102 ZFS_AC_KERNEL_LSEEK_EXECUTE
103 ZFS_AC_KERNEL_VFS_ITERATE
104 ZFS_AC_KERNEL_VFS_RW_ITERATE
105 ZFS_AC_KERNEL_GENERIC_WRITE_CHECKS
106 ZFS_AC_KERNEL_KMAP_ATOMIC_ARGS
107 ZFS_AC_KERNEL_FOLLOW_DOWN_ONE
108 ZFS_AC_KERNEL_MAKE_REQUEST_FN
109 ZFS_AC_KERNEL_GENERIC_IO_ACCT
110 ZFS_AC_KERNEL_RENAME_WANTS_FLAGS
111 ZFS_AC_KERNEL_HAVE_GENERIC_SETXATTR
113 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
114 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
116 AC_SUBST(KERNELMAKE_PARAMS)
119 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
120 dnl # compiler options are added by the kernel build system.
121 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
122 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_BOOL_COMPARE"
123 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
124 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
126 AC_SUBST(KERNELCPPFLAGS)
130 dnl # Detect name used for Module.symvers file in kernel
132 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
133 modpost=$LINUX/scripts/Makefile.modpost
134 AC_MSG_CHECKING([kernel file name for module symbols])
135 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
136 AS_IF([grep -q Modules.symvers $modpost], [
137 LINUX_SYMBOLS=Modules.symvers
139 LINUX_SYMBOLS=Module.symvers
142 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
144 *** Please make sure the kernel devel package for your distribution
145 *** is installed. If you are building with a custom kernel, make sure the
146 *** kernel is configured, built, and the '--with-linux=PATH' configure
147 *** option refers to the location of the kernel source.])
152 AC_MSG_RESULT($LINUX_SYMBOLS)
153 AC_SUBST(LINUX_SYMBOLS)
157 dnl # Detect the kernel to be built against
159 AC_DEFUN([ZFS_AC_KERNEL], [
161 AS_HELP_STRING([--with-linux=PATH],
162 [Path to kernel source]),
163 [kernelsrc="$withval"])
165 AC_ARG_WITH(linux-obj,
166 AS_HELP_STRING([--with-linux-obj=PATH],
167 [Path to kernel build objects]),
168 [kernelbuild="$withval"])
170 AC_MSG_CHECKING([kernel source directory])
171 AS_IF([test -z "$kernelsrc"], [
172 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
173 headersdir="/lib/modules/$(uname -r)/source"
174 sourcelink=$(readlink -f "$headersdir")
175 ], [test -e "/lib/modules/$(uname -r)/build"], [
176 headersdir="/lib/modules/$(uname -r)/build"
177 sourcelink=$(readlink -f "$headersdir")
179 sourcelink=$(ls -1d /usr/src/kernels/* \
181 2>/dev/null | grep -v obj | tail -1)
184 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
185 kernelsrc=`readlink -f ${sourcelink}`
187 kernelsrc="[Not found]"
190 AS_IF([test "$kernelsrc" = "NONE"], [
195 AC_MSG_RESULT([$kernelsrc])
196 AS_IF([test ! -d "$kernelsrc"], [
198 *** Please make sure the kernel devel package for your distribution
199 *** is installed and then try again. If that fails, you can specify the
200 *** location of the kernel source with the '--with-linux=PATH' option.])
203 AC_MSG_CHECKING([kernel build directory])
204 AS_IF([test -z "$kernelbuild"], [
205 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
206 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
207 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
208 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
209 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
210 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
211 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
212 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
214 kernelbuild=${kernelsrc}
217 AC_MSG_RESULT([$kernelbuild])
219 AC_MSG_CHECKING([kernel source version])
220 utsrelease1=$kernelbuild/include/linux/version.h
221 utsrelease2=$kernelbuild/include/linux/utsrelease.h
222 utsrelease3=$kernelbuild/include/generated/utsrelease.h
223 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
224 utsrelease=linux/version.h
225 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
226 utsrelease=linux/utsrelease.h
227 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
228 utsrelease=generated/utsrelease.h
231 AS_IF([test "$utsrelease"], [
232 kernsrcver=`(echo "#include <$utsrelease>";
233 echo "kernsrcver=UTS_RELEASE") |
234 cpp -I $kernelbuild/include |
235 grep "^kernsrcver=" | cut -d \" -f 2`
237 AS_IF([test -z "$kernsrcver"], [
238 AC_MSG_RESULT([Not found])
239 AC_MSG_ERROR([*** Cannot determine kernel version.])
242 AC_MSG_RESULT([Not found])
243 if test "x$enable_linux_builtin" != xyes; then
244 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
247 *** Cannot find UTS_RELEASE definition.
248 *** Please run 'make prepare' inside the kernel source tree.])
252 AC_MSG_RESULT([$kernsrcver])
255 LINUX_OBJ=${kernelbuild}
256 LINUX_VERSION=${kernsrcver}
260 AC_SUBST(LINUX_VERSION)
262 ZFS_AC_MODULE_SYMVERS
267 dnl # Detect the SPL module to be built against
269 AC_DEFUN([ZFS_AC_SPL], [
271 AS_HELP_STRING([--with-spl=PATH],
272 [Path to spl source]),
275 AC_ARG_WITH([spl-obj],
276 AS_HELP_STRING([--with-spl-obj=PATH],
277 [Path to spl build objects]),
278 [splbuild="$withval"])
280 AC_ARG_WITH([spl-timeout],
281 AS_HELP_STRING([--with-spl-timeout=SECS],
282 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
283 [timeout="$withval"], [timeout=0])
286 dnl # The existence of spl.release.in is used to identify a valid
287 dnl # source directory. In order of preference:
289 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
290 splsrc1="/usr/local/src/spl-${VERSION}/${LINUX_VERSION}"
291 splsrc2="/usr/local/src/spl-${VERSION}"
292 splsrc3="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
293 splsrc4="/usr/src/spl-${VERSION}"
297 AC_MSG_CHECKING([spl source directory])
298 AS_IF([test -z "${splsrc}"], [
299 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
301 ], [ test -e "${splsrc1}/spl.release.in"], [
303 ], [ test -e "${splsrc2}/spl.release.in"], [
305 ], [ test -e "${splsrc3}/spl.release.in"], [
306 splsrc=$(readlink -f "${splsrc3}")
307 ], [ test -e "${splsrc4}/spl.release.in" ], [
309 ], [ test -e "${splsrc5}/spl.release.in"], [
310 splsrc=$(readlink -f "${splsrc5}")
311 ], [ test -e "${splsrc6}/spl.release.in" ], [
317 AS_IF([test "$splsrc" = "NONE"], [
323 AC_MSG_RESULT([$splsrc])
324 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
326 *** Please make sure the kmod spl devel package for your distribution
327 *** is installed then try again. If that fails you can specify the
328 *** location of the spl source with the '--with-spl=PATH' option.])
332 dnl # The existence of the spl_config.h is used to identify a valid
333 dnl # spl object directory. In many cases the object and source
334 dnl # directory are the same, however the objects may also reside
335 dnl # is a subdirectory named after the kernel version.
337 dnl # This file is supposed to be available after DKMS finishes
338 dnl # building the SPL kernel module for the target kernel. The
339 dnl # '--with-spl-timeout' option can be passed to pause here,
340 dnl # waiting for the file to appear from a concurrently building
343 AC_MSG_CHECKING([spl build directory])
345 AS_IF([test -z "$splbuild"], [
346 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
347 splbuild="${splsrc}/${LINUX_VERSION}"
348 ], [ test -e "${splsrc}/spl_config.h" ], [
350 ], [ find -L "${splsrc}" -name spl_config.h 2> /dev/null | grep -wq spl_config.h ], [
351 splbuild=$(find -L "${splsrc}" -name spl_config.h | sed 's,/spl_config.h,,')
353 splbuild="[Not found]"
356 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
360 timeout=$((timeout-1))
364 AC_MSG_RESULT([$splbuild])
365 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
367 *** Please make sure the kmod spl devel <kernel> package for your
368 *** distribution is installed then try again. If that fails you
369 *** can specify the location of the spl objects with the
370 *** '--with-spl-obj=PATH' option.])
373 AC_MSG_CHECKING([spl source version])
374 AS_IF([test -r $splbuild/spl_config.h &&
375 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
377 splsrcver=`(echo "#include <spl_config.h>";
378 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
380 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
383 AS_IF([test -z "$splsrcver"], [
384 AC_MSG_RESULT([Not found])
386 *** Cannot determine the version of the spl source.
387 *** Please prepare the spl source before running this script])
390 AC_MSG_RESULT([$splsrcver])
394 SPL_VERSION=${splsrcver}
398 AC_SUBST(SPL_VERSION)
401 dnl # Detect the name used for the SPL Module.symvers file. If one
402 dnl # does not exist this is likely because the SPL has been configured
403 dnl # but not built. The '--with-spl-timeout' option can be passed
404 dnl # to pause here, waiting for the file to appear from a concurrently
405 dnl # building SPL package. If the file does not appear in time, a good
406 dnl # guess is made as to what this file will be named based on what it
407 dnl # is named in the kernel build products. This file will first be
408 dnl # used at link time so if the guess is wrong the build will fail
409 dnl # then. This unfortunately means the ZFS package does not contain a
410 dnl # reliable mechanism to detect symbols exported by the SPL at
411 dnl # configure time.
413 AC_MSG_CHECKING([spl file name for module symbols])
417 AS_IF([test -r $SPL_OBJ/Module.symvers], [
418 SPL_SYMBOLS=Module.symvers
419 ], [test -r $SPL_OBJ/Modules.symvers], [
420 SPL_SYMBOLS=Modules.symvers
421 ], [test -r $SPL_OBJ/module/Module.symvers], [
422 SPL_SYMBOLS=Module.symvers
423 ], [test -r $SPL_OBJ/module/Modules.symvers], [
424 SPL_SYMBOLS=Modules.symvers
427 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
431 timeout=$((timeout-1))
435 AS_IF([test "$SPL_SYMBOLS" = NONE], [
436 SPL_SYMBOLS=$LINUX_SYMBOLS
439 AC_MSG_RESULT([$SPL_SYMBOLS])
440 AC_SUBST(SPL_SYMBOLS)
444 dnl # Basic toolchain sanity check.
446 AC_DEFUN([ZFS_AC_TEST_MODULE], [
447 AC_MSG_CHECKING([whether modules can be built])
448 ZFS_LINUX_TRY_COMPILE([],[],[
452 if test "x$enable_linux_builtin" != xyes; then
453 AC_MSG_ERROR([*** Unable to build an empty module.])
456 *** Unable to build an empty module.
457 *** Please run 'make scripts' inside the kernel source tree.])
463 dnl # Certain kernel build options are not supported. These must be
464 dnl # detected at configure time and cause a build failure. Otherwise
465 dnl # modules may be successfully built that behave incorrectly.
467 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
468 AS_IF([test "x$cross_compiling" != xyes], [
471 #include "$LINUX/include/linux/license.h"
473 return !license_is_gpl_compatible("$ZFS_META_LICENSE");
476 AC_DEFINE([ZFS_IS_GPL_COMPATIBLE], [1],
477 [Define to 1 if GPL-only symbols can be used])
482 ZFS_AC_KERNEL_CONFIG_THREAD_SIZE
483 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
487 dnl # Check configured THREAD_SIZE
489 dnl # The stack size will vary by architecture, but as of Linux 3.15 on x86_64
490 dnl # the default thread stack size was increased to 16K from 8K. Therefore,
491 dnl # on newer kernels and some architectures stack usage optimizations can be
492 dnl # conditionally applied to improve performance without negatively impacting
495 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_THREAD_SIZE], [
496 AC_MSG_CHECKING([whether kernel was built with 16K or larger stacks])
497 ZFS_LINUX_TRY_COMPILE([
498 #include <linux/module.h>
500 #if (THREAD_SIZE < 16384)
501 #error "THREAD_SIZE is less than 16K"
505 AC_DEFINE(HAVE_LARGE_STACKS, 1, [kernel has large stacks])
512 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
514 dnl # This is typically only set for debug kernels because it comes with
515 dnl # a performance penalty. However, when it is set it maps the non-GPL
516 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
517 dnl # This will cause a failure at link time which we'd rather know about
518 dnl # at compile time.
520 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
521 dnl # with the upstream community we add a check to detect this case.
523 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
525 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
526 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
527 tmp_flags="$EXTRA_KCFLAGS"
528 ZFS_LINUX_TRY_COMPILE([
529 #include <linux/module.h>
530 #include <linux/mutex.h>
532 MODULE_LICENSE("$ZFS_META_LICENSE");
544 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
545 *** with the CDDL license and will prevent the module linking stage
546 *** from succeeding. You must rebuild your kernel without this
547 *** option enabled.])
549 EXTRA_KCFLAGS="$tmp_flags"
554 dnl # ZFS_LINUX_CONFTEST_H
556 AC_DEFUN([ZFS_LINUX_CONFTEST_H], [
557 cat - <<_ACEOF >conftest.h
563 dnl # ZFS_LINUX_CONFTEST_C
565 AC_DEFUN([ZFS_LINUX_CONFTEST_C], [
566 cat confdefs.h - <<_ACEOF >conftest.c
572 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
574 m4_define([ZFS_LANG_PROGRAM], [
579 dnl Do *not* indent the following line: there may be CPP directives.
580 dnl Don't move the `;' right after for the same reason.
588 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
590 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
591 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1])])
592 m4_ifvaln([$6], [ZFS_LINUX_CONFTEST_H([$6])], [ZFS_LINUX_CONFTEST_H([])])
593 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
594 echo "obj-m := conftest.o" >build/Makefile
596 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
598 [AC_TRY_COMMAND(cp conftest.c conftest.h build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
600 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
606 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
608 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
609 [ZFS_LINUX_COMPILE_IFELSE(
610 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
612 [test -s build/conftest.o],
617 dnl # ZFS_LINUX_CONFIG
619 AC_DEFUN([ZFS_LINUX_CONFIG],
620 [AC_MSG_CHECKING([whether kernel was built with CONFIG_$1])
621 ZFS_LINUX_TRY_COMPILE([
622 #include <linux/module.h>
625 #error CONFIG_$1 not #defined
637 dnl # ZFS_CHECK_SYMBOL_EXPORT
638 dnl # check symbol exported or not
640 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
641 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
642 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
644 if test $rc -ne 0; then
647 grep -q -E "EXPORT_SYMBOL.*($1)" \
648 "$LINUX/$file" 2>/dev/null
650 if test $rc -eq 0; then
655 if test $export -eq 0; then :
666 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
667 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
668 dnl # is called if not compiling for builtin
670 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
671 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
672 if test $rc -ne 0; then :
675 if test "x$enable_linux_builtin" != xyes; then
676 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
678 if test $rc -ne 0; then :
687 dnl # ZFS_LINUX_TRY_COMPILE_HEADER
688 dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are
689 dnl # provided via the fifth parameter
691 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER],
692 [ZFS_LINUX_COMPILE_IFELSE(
693 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
695 [test -s build/conftest.o],