2 dnl # Default ZFS kernel configuration
4 AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
9 ZFS_AC_KERNEL_DECLARE_EVENT_CLASS
10 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
11 ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID
12 ZFS_AC_KERNEL_TYPE_FMODE_T
13 ZFS_AC_KERNEL_KOBJ_NAME_LEN
14 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
15 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
16 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
17 ZFS_AC_KERNEL_LOOKUP_BDEV
18 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
19 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
20 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
21 ZFS_AC_KERNEL_BIO_BVEC_ITER
22 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
23 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
24 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
25 ZFS_AC_KERNEL_BIO_RW_SYNC
26 ZFS_AC_KERNEL_BIO_RW_SYNCIO
27 ZFS_AC_KERNEL_REQ_SYNC
28 ZFS_AC_KERNEL_BLK_END_REQUEST
29 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
30 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
31 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
32 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
33 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
34 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
35 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
36 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
37 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
38 ZFS_AC_KERNEL_BLK_RQ_BYTES
39 ZFS_AC_KERNEL_BLK_RQ_POS
40 ZFS_AC_KERNEL_BLK_RQ_SECTORS
41 ZFS_AC_KERNEL_GET_DISK_RO
42 ZFS_AC_KERNEL_GET_GENDISK
43 ZFS_AC_KERNEL_RQ_IS_SYNC
44 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
45 ZFS_AC_KERNEL_DISCARD_GRANULARITY
46 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
47 ZFS_AC_KERNEL_XATTR_HANDLER_GET
48 ZFS_AC_KERNEL_XATTR_HANDLER_SET
49 ZFS_AC_KERNEL_XATTR_HANDLER_LIST
50 ZFS_AC_KERNEL_INODE_OWNER_OR_CAPABLE
51 ZFS_AC_KERNEL_POSIX_ACL_FROM_XATTR_USERNS
52 ZFS_AC_KERNEL_POSIX_ACL_RELEASE
53 ZFS_AC_KERNEL_POSIX_ACL_CHMOD
54 ZFS_AC_KERNEL_POSIX_ACL_CACHING
55 ZFS_AC_KERNEL_POSIX_ACL_EQUIV_MODE_WANTS_UMODE_T
56 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION
57 ZFS_AC_KERNEL_INODE_OPERATIONS_PERMISSION_WITH_NAMEIDATA
58 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL
59 ZFS_AC_KERNEL_INODE_OPERATIONS_CHECK_ACL_WITH_FLAGS
60 ZFS_AC_KERNEL_INODE_OPERATIONS_GET_ACL
61 ZFS_AC_KERNEL_CURRENT_UMASK
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_MKDIR_UMODE_T
71 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
72 ZFS_AC_KERNEL_CREATE_NAMEIDATA
73 ZFS_AC_KERNEL_TRUNCATE_RANGE
74 ZFS_AC_KERNEL_AUTOMOUNT
75 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
76 ZFS_AC_KERNEL_COMMIT_METADATA
77 ZFS_AC_KERNEL_CLEAR_INODE
78 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
79 ZFS_AC_KERNEL_D_MAKE_ROOT
80 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
81 ZFS_AC_KERNEL_D_PRUNE_ALIASES
82 ZFS_AC_KERNEL_D_SET_D_OP
83 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
84 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
85 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
86 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
87 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
88 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
89 ZFS_AC_KERNEL_MOUNT_NODEV
91 ZFS_AC_KERNEL_SHRINK_CONTROL_HAS_NID
92 ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD
94 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
95 ZFS_AC_KERNEL_SET_NLINK
96 ZFS_AC_KERNEL_ELEVATOR_CHANGE
97 ZFS_AC_KERNEL_5ARG_SGET
98 ZFS_AC_KERNEL_LSEEK_EXECUTE
99 ZFS_AC_KERNEL_VFS_ITERATE
100 ZFS_AC_KERNEL_VFS_RW_ITERATE
102 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
103 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
105 AC_SUBST(KERNELMAKE_PARAMS)
108 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
109 dnl # compiler options are added by the kernel build system.
110 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
111 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
112 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
114 AC_SUBST(KERNELCPPFLAGS)
118 dnl # Detect name used for Module.symvers file in kernel
120 AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
121 modpost=$LINUX/scripts/Makefile.modpost
122 AC_MSG_CHECKING([kernel file name for module symbols])
123 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
124 AS_IF([grep -q Modules.symvers $modpost], [
125 LINUX_SYMBOLS=Modules.symvers
127 LINUX_SYMBOLS=Module.symvers
130 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
132 *** Please make sure the kernel devel package for your distribution
133 *** is installed. If you are building with a custom kernel, make sure the
134 *** kernel is configured, built, and the '--with-linux=PATH' configure
135 *** option refers to the location of the kernel source.])
140 AC_MSG_RESULT($LINUX_SYMBOLS)
141 AC_SUBST(LINUX_SYMBOLS)
145 dnl # Detect the kernel to be built against
147 AC_DEFUN([ZFS_AC_KERNEL], [
149 AS_HELP_STRING([--with-linux=PATH],
150 [Path to kernel source]),
151 [kernelsrc="$withval"])
153 AC_ARG_WITH(linux-obj,
154 AS_HELP_STRING([--with-linux-obj=PATH],
155 [Path to kernel build objects]),
156 [kernelbuild="$withval"])
158 AC_MSG_CHECKING([kernel source directory])
159 AS_IF([test -z "$kernelsrc"], [
160 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
161 headersdir="/lib/modules/$(uname -r)/source"
162 sourcelink=$(readlink -f "$headersdir")
163 ], [test -e "/lib/modules/$(uname -r)/build"], [
164 headersdir="/lib/modules/$(uname -r)/build"
165 sourcelink=$(readlink -f "$headersdir")
167 sourcelink=$(ls -1d /usr/src/kernels/* \
169 2>/dev/null | grep -v obj | tail -1)
172 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
173 kernelsrc=`readlink -f ${sourcelink}`
175 kernelsrc="[Not found]"
178 AS_IF([test "$kernelsrc" = "NONE"], [
183 AC_MSG_RESULT([$kernelsrc])
184 AS_IF([test ! -d "$kernelsrc"], [
186 *** Please make sure the kernel devel package for your distribution
187 *** is installed and then try again. If that fails, you can specify the
188 *** location of the kernel source with the '--with-linux=PATH' option.])
191 AC_MSG_CHECKING([kernel build directory])
192 AS_IF([test -z "$kernelbuild"], [
193 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
194 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
195 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
196 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
197 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
198 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
199 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
200 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
202 kernelbuild=${kernelsrc}
205 AC_MSG_RESULT([$kernelbuild])
207 AC_MSG_CHECKING([kernel source version])
208 utsrelease1=$kernelbuild/include/linux/version.h
209 utsrelease2=$kernelbuild/include/linux/utsrelease.h
210 utsrelease3=$kernelbuild/include/generated/utsrelease.h
211 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
212 utsrelease=linux/version.h
213 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
214 utsrelease=linux/utsrelease.h
215 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
216 utsrelease=generated/utsrelease.h
219 AS_IF([test "$utsrelease"], [
220 kernsrcver=`(echo "#include <$utsrelease>";
221 echo "kernsrcver=UTS_RELEASE") |
222 cpp -I $kernelbuild/include |
223 grep "^kernsrcver=" | cut -d \" -f 2`
225 AS_IF([test -z "$kernsrcver"], [
226 AC_MSG_RESULT([Not found])
227 AC_MSG_ERROR([*** Cannot determine kernel version.])
230 AC_MSG_RESULT([Not found])
231 if test "x$enable_linux_builtin" != xyes; then
232 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
235 *** Cannot find UTS_RELEASE definition.
236 *** Please run 'make prepare' inside the kernel source tree.])
240 AC_MSG_RESULT([$kernsrcver])
243 LINUX_OBJ=${kernelbuild}
244 LINUX_VERSION=${kernsrcver}
248 AC_SUBST(LINUX_VERSION)
250 ZFS_AC_MODULE_SYMVERS
255 dnl # Detect the SPL module to be built against
257 AC_DEFUN([ZFS_AC_SPL], [
259 AS_HELP_STRING([--with-spl=PATH],
260 [Path to spl source]),
263 AC_ARG_WITH([spl-obj],
264 AS_HELP_STRING([--with-spl-obj=PATH],
265 [Path to spl build objects]),
266 [splbuild="$withval"])
268 AC_ARG_WITH([spl-timeout],
269 AS_HELP_STRING([--with-spl-timeout=SECS],
270 [Wait SECS for SPL header and symver file @<:@default=0@:>@]),
271 [timeout="$withval"], [timeout=0])
274 dnl # The existence of spl.release.in is used to identify a valid
275 dnl # source directory. In order of preference:
277 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
278 splsrc1="/usr/local/src/spl-${VERSION}/${LINUX_VERSION}"
279 splsrc2="/usr/local/src/spl-${VERSION}"
280 splsrc3="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
281 splsrc4="/usr/src/spl-${VERSION}"
285 AC_MSG_CHECKING([spl source directory])
286 AS_IF([test -z "${splsrc}"], [
287 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
289 ], [ test -e "${splsrc1}/spl.release.in"], [
291 ], [ test -e "${splsrc2}/spl.release.in"], [
293 ], [ test -e "${splsrc3}/spl.release.in"], [
294 splsrc=$(readlink -f "${splsrc3}")
295 ], [ test -e "${splsrc4}/spl.release.in" ], [
297 ], [ test -e "${splsrc5}/spl.release.in"], [
298 splsrc=$(readlink -f "${splsrc5}")
299 ], [ test -e "${splsrc6}/spl.release.in" ], [
305 AS_IF([test "$splsrc" = "NONE"], [
311 AC_MSG_RESULT([$splsrc])
312 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
314 *** Please make sure the kmod spl devel package for your distribution
315 *** is installed then try again. If that fails you can specify the
316 *** location of the spl source with the '--with-spl=PATH' option.])
320 dnl # The existence of the spl_config.h is used to identify a valid
321 dnl # spl object directory. In many cases the object and source
322 dnl # directory are the same, however the objects may also reside
323 dnl # is a subdirectory named after the kernel version.
325 dnl # This file is supposed to be available after DKMS finishes
326 dnl # building the SPL kernel module for the target kernel. The
327 dnl # '--with-spl-timeout' option can be passed to pause here,
328 dnl # waiting for the file to appear from a concurrently building
331 AC_MSG_CHECKING([spl build directory])
333 AS_IF([test -z "$splbuild"], [
334 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
335 splbuild="${splsrc}/${LINUX_VERSION}"
336 ], [ test -e "${splsrc}/spl_config.h" ], [
339 splbuild="[Not found]"
342 AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [
346 timeout=$((timeout-1))
350 AC_MSG_RESULT([$splbuild])
351 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
353 *** Please make sure the kmod spl devel <kernel> package for your
354 *** distribution is installed then try again. If that fails you
355 *** can specify the location of the spl objects with the
356 *** '--with-spl-obj=PATH' option.])
359 AC_MSG_CHECKING([spl source version])
360 AS_IF([test -r $splbuild/spl_config.h &&
361 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
363 splsrcver=`(echo "#include <spl_config.h>";
364 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
366 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
369 AS_IF([test -z "$splsrcver"], [
370 AC_MSG_RESULT([Not found])
372 *** Cannot determine the version of the spl source.
373 *** Please prepare the spl source before running this script])
376 AC_MSG_RESULT([$splsrcver])
380 SPL_VERSION=${splsrcver}
384 AC_SUBST(SPL_VERSION)
387 dnl # Detect the name used for the SPL Module.symvers file. If one
388 dnl # does not exist this is likely because the SPL has been configured
389 dnl # but not built. The '--with-spl-timeout' option can be passed
390 dnl # to pause here, waiting for the file to appear from a concurrently
391 dnl # building SPL package. If the file does not appear in time, a good
392 dnl # guess is made as to what this file will be named based on what it
393 dnl # is named in the kernel build products. This file will first be
394 dnl # used at link time so if the guess is wrong the build will fail
395 dnl # then. This unfortunately means the ZFS package does not contain a
396 dnl # reliable mechanism to detect symbols exported by the SPL at
397 dnl # configure time.
399 AC_MSG_CHECKING([spl file name for module symbols])
403 AS_IF([test -r $SPL_OBJ/Module.symvers], [
404 SPL_SYMBOLS=Module.symvers
405 ], [test -r $SPL_OBJ/Modules.symvers], [
406 SPL_SYMBOLS=Modules.symvers
407 ], [test -r $SPL_OBJ/module/Module.symvers], [
408 SPL_SYMBOLS=Module.symvers
409 ], [test -r $SPL_OBJ/module/Modules.symvers], [
410 SPL_SYMBOLS=Modules.symvers
413 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
417 timeout=$((timeout-1))
421 AS_IF([test "$SPL_SYMBOLS" = NONE], [
422 SPL_SYMBOLS=$LINUX_SYMBOLS
425 AC_MSG_RESULT([$SPL_SYMBOLS])
426 AC_SUBST(SPL_SYMBOLS)
430 dnl # Basic toolchain sanity check.
432 AC_DEFUN([ZFS_AC_TEST_MODULE], [
433 AC_MSG_CHECKING([whether modules can be built])
434 ZFS_LINUX_TRY_COMPILE([],[],[
438 if test "x$enable_linux_builtin" != xyes; then
439 AC_MSG_ERROR([*** Unable to build an empty module.])
442 *** Unable to build an empty module.
443 *** Please run 'make scripts' inside the kernel source tree.])
449 dnl # Certain kernel build options are not supported. These must be
450 dnl # detected at configure time and cause a build failure. Otherwise
451 dnl # modules may be successfully built that behave incorrectly.
453 AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
456 #include "$LINUX/include/linux/license.h"
458 return !license_is_gpl_compatible("$ZFS_META_LICENSE");
461 AC_DEFINE([ZFS_IS_GPL_COMPATIBLE], [1],
462 [Define to 1 if GPL-only symbols can be used])
466 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
470 dnl # Check CONFIG_DEBUG_LOCK_ALLOC
472 dnl # This is typically only set for debug kernels because it comes with
473 dnl # a performance penalty. However, when it is set it maps the non-GPL
474 dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
475 dnl # This will cause a failure at link time which we'd rather know about
476 dnl # at compile time.
478 dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
479 dnl # with the upstream community we add a check to detect this case.
481 AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
483 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
484 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
485 tmp_flags="$EXTRA_KCFLAGS"
486 ZFS_LINUX_TRY_COMPILE([
487 #include <linux/module.h>
488 #include <linux/mutex.h>
490 MODULE_LICENSE("$ZFS_META_LICENSE");
502 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
503 *** with the CDDL license and will prevent the module linking stage
504 *** from succeeding. You must rebuild your kernel without this
505 *** option enabled.])
507 EXTRA_KCFLAGS="$tmp_flags"
512 dnl # ZFS_LINUX_CONFTEST_H
514 AC_DEFUN([ZFS_LINUX_CONFTEST_H], [
515 cat - <<_ACEOF >conftest.h
521 dnl # ZFS_LINUX_CONFTEST_C
523 AC_DEFUN([ZFS_LINUX_CONFTEST_C], [
524 cat confdefs.h - <<_ACEOF >conftest.c
530 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
532 m4_define([ZFS_LANG_PROGRAM], [
537 dnl Do *not* indent the following line: there may be CPP directives.
538 dnl Don't move the `;' right after for the same reason.
546 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
548 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
549 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST_C([$1])])
550 m4_ifvaln([$6], [ZFS_LINUX_CONFTEST_H([$6])], [ZFS_LINUX_CONFTEST_H([])])
551 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
552 echo "obj-m := conftest.o" >build/Makefile
554 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
556 [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])],
558 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
564 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
566 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
567 [ZFS_LINUX_COMPILE_IFELSE(
568 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
570 [test -s build/conftest.o],
575 dnl # ZFS_LINUX_CONFIG
577 AC_DEFUN([ZFS_LINUX_CONFIG],
578 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
579 ZFS_LINUX_TRY_COMPILE([
580 #include <linux/module.h>
583 #error CONFIG_$1 not #defined
595 dnl # ZFS_CHECK_SYMBOL_EXPORT
596 dnl # check symbol exported or not
598 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
599 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
600 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
602 if test $rc -ne 0; then
605 grep -q -E "EXPORT_SYMBOL.*($1)" \
606 "$LINUX/$file" 2>/dev/null
608 if test $rc -eq 0; then
613 if test $export -eq 0; then :
624 dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
625 dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
626 dnl # is called if not compiling for builtin
628 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
629 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
630 if test $rc -ne 0; then :
633 if test "x$enable_linux_builtin" != xyes; then
634 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
636 if test $rc -ne 0; then :
645 dnl # ZFS_LINUX_TRY_COMPILE_HEADER
646 dnl # like ZFS_LINUX_TRY_COMPILE, except the contents conftest.h are
647 dnl # provided via the fifth parameter
649 AC_DEFUN([ZFS_LINUX_TRY_COMPILE_HEADER],
650 [ZFS_LINUX_COMPILE_IFELSE(
651 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
653 [test -s build/conftest.o],