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CommitLineData
c9c0d073
BB
1dnl #
2dnl # Default ZFS kernel configuration
3dnl #
4AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
5 ZFS_AC_KERNEL
6 ZFS_AC_SPL
319a99a3 7 ZFS_AC_TEST_MODULE
c9c0d073
BB
8 ZFS_AC_KERNEL_CONFIG
9 ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS
10 ZFS_AC_KERNEL_TYPE_FMODE_T
11 ZFS_AC_KERNEL_KOBJ_NAME_LEN
b5a28807 12 ZFS_AC_KERNEL_3ARG_BLKDEV_GET
45066d1f 13 ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH
c9c0d073 14 ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE
2b7ab9d4 15 ZFS_AC_KERNEL_LOOKUP_BDEV
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16 ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS
17 ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE
2404b014 18 ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE
2959d94a 19 ZFS_AC_KERNEL_BIO_FAILFAST
f4af6bb7
BB
20 ZFS_AC_KERNEL_BIO_FAILFAST_DTD
21 ZFS_AC_KERNEL_REQ_FAILFAST_MASK
c9c0d073 22 ZFS_AC_KERNEL_BIO_END_IO_T_ARGS
675de5aa 23 ZFS_AC_KERNEL_BIO_RW_SYNC
c9c0d073 24 ZFS_AC_KERNEL_BIO_RW_SYNCIO
675de5aa 25 ZFS_AC_KERNEL_REQ_SYNC
c9c0d073 26 ZFS_AC_KERNEL_BLK_END_REQUEST
b18019d2 27 ZFS_AC_KERNEL_BLK_QUEUE_FLUSH
34037afe
ED
28 ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS
29 ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS
30 ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE
31 ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT
32 ZFS_AC_KERNEL_BLK_QUEUE_NONROT
30930fba 33 ZFS_AC_KERNEL_BLK_QUEUE_DISCARD
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34 ZFS_AC_KERNEL_BLK_FETCH_REQUEST
35 ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST
36 ZFS_AC_KERNEL_BLK_RQ_BYTES
37 ZFS_AC_KERNEL_BLK_RQ_POS
38 ZFS_AC_KERNEL_BLK_RQ_SECTORS
39 ZFS_AC_KERNEL_GET_DISK_RO
b5a28807 40 ZFS_AC_KERNEL_GET_GENDISK
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41 ZFS_AC_KERNEL_RQ_IS_SYNC
42 ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT
ee5fd0bb 43 ZFS_AC_KERNEL_DISCARD_GRANULARITY
777d4af8 44 ZFS_AC_KERNEL_CONST_XATTR_HANDLER
f9637c6c
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45 ZFS_AC_KERNEL_XATTR_HANDLER_GET
46 ZFS_AC_KERNEL_XATTR_HANDLER_SET
47621f3d 47 ZFS_AC_KERNEL_SHOW_OPTIONS
adcd70bd 48 ZFS_AC_KERNEL_FSYNC
2c395def 49 ZFS_AC_KERNEL_EVICT_INODE
8780c539 50 ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS
ab26409d
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51 ZFS_AC_KERNEL_NR_CACHED_OBJECTS
52 ZFS_AC_KERNEL_FREE_CACHED_OBJECTS
cb2d1901 53 ZFS_AC_KERNEL_FALLOCATE
95f5c63b 54 ZFS_AC_KERNEL_MKDIR_UMODE_T
8f195a90 55 ZFS_AC_KERNEL_LOOKUP_NAMEIDATA
558ef6d0 56 ZFS_AC_KERNEL_CREATE_NAMEIDATA
ea1fdf46 57 ZFS_AC_KERNEL_TRUNCATE_RANGE
ebe7e575 58 ZFS_AC_KERNEL_AUTOMOUNT
756c3e5a 59 ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE
393b44c7 60 ZFS_AC_KERNEL_COMMIT_METADATA
739a1a82 61 ZFS_AC_KERNEL_CLEAR_INODE
bdf4328b 62 ZFS_AC_KERNEL_INSERT_INODE_LOCKED
6a0936ba 63 ZFS_AC_KERNEL_D_MAKE_ROOT
055656d4 64 ZFS_AC_KERNEL_D_OBTAIN_ALIAS
f1a05fa1
NB
65 ZFS_AC_KERNEL_D_SET_D_OP
66 ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA
67 ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS
df554c14 68 ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE
b3129792 69 ZFS_AC_KERNEL_TRUNCATE_SETSIZE
5c03efc3 70 ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY
166dd49d 71 ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY
2cf7f52b 72 ZFS_AC_KERNEL_MOUNT_NODEV
ab26409d 73 ZFS_AC_KERNEL_SHRINK
ee930353 74 ZFS_AC_KERNEL_S_D_OP
76659dc1 75 ZFS_AC_KERNEL_BDI
5547c2f1 76 ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER
28eb9213 77 ZFS_AC_KERNEL_SET_NLINK
6d1d976b 78 ZFS_AC_KERNEL_ELEVATOR_CHANGE
3c203610 79 ZFS_AC_KERNEL_5ARG_SGET
c9c0d073 80
8366cd6a 81 AS_IF([test "$LINUX_OBJ" != "$LINUX"], [
6283f55e 82 KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
8366cd6a 83 ])
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84 AC_SUBST(KERNELMAKE_PARAMS)
85
86
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87 dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other
88 dnl # compiler options are added by the kernel build system.
8a7e1cee 89 KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE"
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90 KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL"
91 KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\""
c9c0d073 92
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93 AC_SUBST(KERNELCPPFLAGS)
94])
95
96dnl #
97dnl # Detect name used for Module.symvers file in kernel
98dnl #
99AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [
100 modpost=$LINUX/scripts/Makefile.modpost
101 AC_MSG_CHECKING([kernel file name for module symbols])
319a99a3 102 AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [
8366cd6a 103 AS_IF([grep -q Modules.symvers $modpost], [
c9c0d073 104 LINUX_SYMBOLS=Modules.symvers
8366cd6a 105 ], [
c9c0d073 106 LINUX_SYMBOLS=Module.symvers
8366cd6a 107 ])
a60b1c0a 108
8366cd6a 109 AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [
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110 AC_MSG_ERROR([
111 *** Please make sure the kernel devel package for your distribution
112 *** is installed. If your building with a custom kernel make sure the
113 *** kernel is configured, built, and the '--with-linux=PATH' configure
114 *** option refers to the location of the kernel source.])
8366cd6a
PS
115 ])
116 ], [
c9c0d073 117 LINUX_SYMBOLS=NONE
8366cd6a 118 ])
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119 AC_MSG_RESULT($LINUX_SYMBOLS)
120 AC_SUBST(LINUX_SYMBOLS)
121])
122
123dnl #
124dnl # Detect the kernel to be built against
125dnl #
126AC_DEFUN([ZFS_AC_KERNEL], [
127 AC_ARG_WITH([linux],
128 AS_HELP_STRING([--with-linux=PATH],
129 [Path to kernel source]),
130 [kernelsrc="$withval"])
131
132 AC_ARG_WITH(linux-obj,
133 AS_HELP_STRING([--with-linux-obj=PATH],
134 [Path to kernel build objects]),
135 [kernelbuild="$withval"])
136
137 AC_MSG_CHECKING([kernel source directory])
8366cd6a
PS
138 AS_IF([test -z "$kernelsrc"], [
139 AS_IF([test -e "/lib/modules/$(uname -r)/source"], [
1b94c25c
BB
140 headersdir="/lib/modules/$(uname -r)/source"
141 sourcelink=$(readlink -f "$headersdir")
8366cd6a 142 ], [test -e "/lib/modules/$(uname -r)/build"], [
1b94c25c 143 headersdir="/lib/modules/$(uname -r)/build"
c9c0d073 144 sourcelink=$(readlink -f "$headersdir")
8366cd6a 145 ], [
c9c0d073 146 sourcelink=$(ls -1d /usr/src/kernels/* \
8366cd6a 147 /usr/src/linux-* \
c9c0d073 148 2>/dev/null | grep -v obj | tail -1)
8366cd6a 149 ])
c9c0d073 150
8366cd6a 151 AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [
c9c0d073 152 kernelsrc=`readlink -f ${sourcelink}`
8366cd6a 153 ], [
56a517ae 154 kernelsrc="[Not found]"
8366cd6a
PS
155 ])
156 ], [
157 AS_IF([test "$kernelsrc" = "NONE"], [
c9c0d073 158 kernsrcver=NONE
8366cd6a
PS
159 ])
160 ])
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161
162 AC_MSG_RESULT([$kernelsrc])
56a517ae
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163 AS_IF([test ! -d "$kernelsrc"], [
164 AC_MSG_ERROR([
165 *** Please make sure the kernel devel package for your distribution
166 *** is installed then try again. If that fails you can specify the
167 *** location of the kernel source with the '--with-linux=PATH' option.])
168 ])
169
c9c0d073 170 AC_MSG_CHECKING([kernel build directory])
8366cd6a
PS
171 AS_IF([test -z "$kernelbuild"], [
172 AS_IF([test -e "/lib/modules/$(uname -r)/build"], [
1b94c25c 173 kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
8366cd6a 174 ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [
c9c0d073 175 kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
8366cd6a 176 ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [
70574182 177 kernelbuild=${kernelsrc}-obj/${target_cpu}/default
8366cd6a 178 ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [
c9c0d073 179 kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
8366cd6a 180 ], [
c9c0d073 181 kernelbuild=${kernelsrc}
8366cd6a
PS
182 ])
183 ])
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184 AC_MSG_RESULT([$kernelbuild])
185
186 AC_MSG_CHECKING([kernel source version])
187 utsrelease1=$kernelbuild/include/linux/version.h
188 utsrelease2=$kernelbuild/include/linux/utsrelease.h
189 utsrelease3=$kernelbuild/include/generated/utsrelease.h
8366cd6a 190 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [
c9c0d073 191 utsrelease=linux/version.h
8366cd6a 192 ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [
c9c0d073 193 utsrelease=linux/utsrelease.h
8366cd6a 194 ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [
c9c0d073 195 utsrelease=generated/utsrelease.h
8366cd6a 196 ])
c9c0d073 197
8366cd6a 198 AS_IF([test "$utsrelease"], [
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199 kernsrcver=`(echo "#include <$utsrelease>";
200 echo "kernsrcver=UTS_RELEASE") |
201 cpp -I $kernelbuild/include |
202 grep "^kernsrcver=" | cut -d \" -f 2`
203
8366cd6a 204 AS_IF([test -z "$kernsrcver"], [
c9c0d073
BB
205 AC_MSG_RESULT([Not found])
206 AC_MSG_ERROR([*** Cannot determine kernel version.])
8366cd6a
PS
207 ])
208 ], [
c9c0d073 209 AC_MSG_RESULT([Not found])
319a99a3
ED
210 if test "x$enable_linux_builtin" != xyes; then
211 AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
212 else
213 AC_MSG_ERROR([
214 *** Cannot find UTS_RELEASE definition.
215 *** Please run 'make prepare' inside the kernel source tree.])
216 fi
8366cd6a 217 ])
c9c0d073
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218
219 AC_MSG_RESULT([$kernsrcver])
220
221 LINUX=${kernelsrc}
222 LINUX_OBJ=${kernelbuild}
223 LINUX_VERSION=${kernsrcver}
224
225 AC_SUBST(LINUX)
226 AC_SUBST(LINUX_OBJ)
227 AC_SUBST(LINUX_VERSION)
228
229 ZFS_AC_MODULE_SYMVERS
230])
231
232dnl #
233dnl # Detect name used for the additional SPL Module.symvers file. If one
234dnl # does not exist this is likely because the SPL has been configured
5085d558
PS
235dnl # but not built. The '--with-spl-timeout' option can be passed
236dnl # to pause here, waiting for the file to appear from a concurrently
237dnl # building SPL package. If the file does not appear in time, a good
238dnl # guess is made as to what this file will be named based on what it
239dnl # is named in the kernel build products. This file will first be
240dnl # used at link time so if the guess is wrong the build will fail
241dnl # then. This unfortunately means the ZFS package does not contain a
242dnl # reliable mechanism to detect symbols exported by the SPL at
243dnl # configure time.
c9c0d073
BB
244dnl #
245AC_DEFUN([ZFS_AC_SPL_MODULE_SYMVERS], [
5085d558
PS
246 AC_ARG_WITH([spl-timeout],
247 AS_HELP_STRING([--with-spl-timeout=SECS],
248 [Wait SECS for symvers file to appear @<:@default=0@:>@]),
249 [timeout="$withval"], [timeout=0])
250
c9c0d073 251 AC_MSG_CHECKING([spl file name for module symbols])
5085d558
PS
252 SPL_SYMBOLS=NONE
253
254 while true; do
255 AS_IF([test -r $SPL_OBJ/Module.symvers], [
256 SPL_SYMBOLS=Module.symvers
257 ], [test -r $SPL_OBJ/Modules.symvers], [
258 SPL_SYMBOLS=Modules.symvers
259 ], [test -r $SPL_OBJ/module/Module.symvers], [
260 SPL_SYMBOLS=Module.symvers
261 ], [test -r $SPL_OBJ/module/Modules.symvers], [
262 SPL_SYMBOLS=Modules.symvers
263 ])
264
265 AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [
266 break;
267 ], [
268 sleep 1
269 timeout=$((timeout-1))
270 ])
271 done
272
273 AS_IF([test "$SPL_SYMBOLS" = NONE], [
c9c0d073 274 SPL_SYMBOLS=$LINUX_SYMBOLS
8366cd6a 275 ])
c9c0d073
BB
276
277 AC_MSG_RESULT([$SPL_SYMBOLS])
278 AC_SUBST(SPL_SYMBOLS)
279])
280
281dnl #
282dnl # Detect the SPL module to be built against
283dnl #
284AC_DEFUN([ZFS_AC_SPL], [
285 AC_ARG_WITH([spl],
286 AS_HELP_STRING([--with-spl=PATH],
287 [Path to spl source]),
288 [splsrc="$withval"])
289
290 AC_ARG_WITH([spl-obj],
291 AS_HELP_STRING([--with-spl-obj=PATH],
292 [Path to spl build objects]),
293 [splbuild="$withval"])
294
9b2af9a0
BB
295 dnl #
296 dnl # The existence of spl.release.in is used to identify a valid
297 dnl # source directory. In order of preference:
298 dnl #
299 splsrc0="/var/lib/dkms/spl/${VERSION}/build"
300 splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}"
301 splsrc2="/usr/src/spl-${VERSION}"
302 splsrc3="../spl/"
303 splsrc4="$LINUX"
c9c0d073
BB
304
305 AC_MSG_CHECKING([spl source directory])
9b2af9a0
BB
306 AS_IF([test -z "${splsrc}"], [
307 AS_IF([ test -e "${splsrc0}/spl.release.in"], [
308 splsrc=${splsrc0}
309 ], [ test -e "${splsrc1}/spl.release.in"], [
310 splsrc=${splsrc1}
311 ], [ test -e "${splsrc2}/spl.release.in"], [
312 splsrc=${splsrc2}
313 ], [ test -e "${splsrc3}/spl.release.in"], [
314 splsrc=$(readlink -f "${splsrc3}")
315 ], [ test -e "${splsrc4}/spl.release.in" ], [
316 splsrc=${splsrc4}
8366cd6a 317 ], [
9b2af9a0 318 splsrc="[Not found]"
8366cd6a
PS
319 ])
320 ], [
321 AS_IF([test "$splsrc" = "NONE"], [
c9c0d073
BB
322 splbuild=NONE
323 splsrcver=NONE
8366cd6a
PS
324 ])
325 ])
c9c0d073
BB
326
327 AC_MSG_RESULT([$splsrc])
9b2af9a0
BB
328 AS_IF([ test ! -e "$splsrc/spl.release.in"], [
329 AC_MSG_ERROR([
330 *** Please make sure the kmod spl devel package for your distribution
331 *** is installed then try again. If that fails you can specify the
332 *** location of the spl source with the '--with-spl=PATH' option.])
333 ])
334
335 dnl #
336 dnl # The existence of the spl_config.h is used to identify a valid
337 dnl # spl object directory. In many cases the object and source
338 dnl # directory are the same, however the objects may also reside
339 dnl # is a subdirectory named after the kernel version.
340 dnl #
c9c0d073 341 AC_MSG_CHECKING([spl build directory])
8366cd6a 342 AS_IF([test -z "$splbuild"], [
9b2af9a0
BB
343 AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [
344 splbuild="${splsrc}/${LINUX_VERSION}"
345 ], [ test -e "${splsrc}/spl_config.h" ], [
346 splbuild="${splsrc}"
347 ], [
348 splbuild="[Not found]"
349 ])
8366cd6a 350 ])
9b2af9a0 351
c9c0d073 352 AC_MSG_RESULT([$splbuild])
9b2af9a0
BB
353 AS_IF([ ! test -e "$splbuild/spl_config.h"], [
354 AC_MSG_ERROR([
355 *** Please make sure the kmod spl devel <kernel> package for your
356 *** distribution is installed then try again. If that fails you
357 *** can specify the location of the spl objects with the
358 *** '--with-spl-obj=PATH' option.])
359 ])
c9c0d073
BB
360
361 AC_MSG_CHECKING([spl source version])
8366cd6a
PS
362 AS_IF([test -r $splbuild/spl_config.h &&
363 fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [
c9c0d073
BB
364
365 splsrcver=`(echo "#include <spl_config.h>";
b40a77ae 366 echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") |
5e612145 367 cpp -I $splbuild |
b40a77ae 368 grep "^splsrcver=" | tr -d \" | cut -d= -f2`
8366cd6a 369 ])
c9c0d073 370
8366cd6a 371 AS_IF([test -z "$splsrcver"], [
c9c0d073
BB
372 AC_MSG_RESULT([Not found])
373 AC_MSG_ERROR([
2984e0bb
PS
374 *** Cannot determine the version of the spl source.
375 *** Please prepare the spl source before running this script])
8366cd6a 376 ])
c9c0d073
BB
377
378 AC_MSG_RESULT([$splsrcver])
379
380 SPL=${splsrc}
381 SPL_OBJ=${splbuild}
382 SPL_VERSION=${splsrcver}
383
384 AC_SUBST(SPL)
385 AC_SUBST(SPL_OBJ)
386 AC_SUBST(SPL_VERSION)
387
388 ZFS_AC_SPL_MODULE_SYMVERS
389])
390
319a99a3
ED
391dnl #
392dnl # Basic toolchain sanity check.
393dnl #
394AC_DEFUN([ZFS_AC_TEST_MODULE],
395 [AC_MSG_CHECKING([whether modules can be built])
396 ZFS_LINUX_TRY_COMPILE([],[],[
397 AC_MSG_RESULT([yes])
398 ],[
399 AC_MSG_RESULT([no])
400 if test "x$enable_linux_builtin" != xyes; then
401 AC_MSG_ERROR([*** Unable to build an empty module.])
402 else
403 AC_MSG_ERROR([
404 *** Unable to build an empty module.
405 *** Please run 'make scripts' inside the kernel source tree.])
406 fi
407 ])
408])
409
15805c77
BB
410dnl #
411dnl # Certain kernel build options are not supported. These must be
412dnl # detected at configure time and cause a build failure. Otherwise
413dnl # modules may be successfully built that behave incorrectly.
414dnl #
e5b85622
BB
415AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [
416
417 AS_IF([test "$ZFS_META_LICENSE" = GPL], [
418 AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
419 [Define to 1 if licensed under the GPL])
420 ])
421
e5b85622
BB
422 ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
423])
424
e5b85622
BB
425dnl #
426dnl # Check CONFIG_DEBUG_LOCK_ALLOC
427dnl #
428dnl # This is typically only set for debug kernels because it comes with
429dnl # a performance penalty. However, when it is set it maps the non-GPL
430dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
431dnl # This will cause a failure at link time which we'd rather know about
432dnl # at compile time.
433dnl #
434dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
435dnl # with the upstream community we add a check to detect this case.
436dnl #
437AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
438
439 ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [
440 AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
441 tmp_flags="$EXTRA_KCFLAGS"
442 ZFS_LINUX_TRY_COMPILE([
443 #include <linux/module.h>
444 #include <linux/mutex.h>
445
446 MODULE_LICENSE("$ZFS_META_LICENSE");
447 ],[
448 struct mutex lock;
449
450 mutex_init(&lock);
451 mutex_lock(&lock);
452 mutex_unlock(&lock);
453 ],[
454 AC_MSG_RESULT(no)
455 ],[
456 AC_MSG_RESULT(yes)
457 AC_MSG_ERROR([
458 *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
cac1f230
NB
459 *** with the CDDL license and will prevent the module linking stage
460 *** from succeeding. You must rebuild your kernel without this
461 *** option enabled.])
e5b85622
BB
462 ])
463 EXTRA_KCFLAGS="$tmp_flags"
464 ], [])
c9c0d073
BB
465])
466
467dnl #
468dnl # ZFS_LINUX_CONFTEST
469dnl #
470AC_DEFUN([ZFS_LINUX_CONFTEST], [
471cat confdefs.h - <<_ACEOF >conftest.c
472$1
473_ACEOF
474])
475
476dnl #
477dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
478dnl #
479m4_define([ZFS_LANG_PROGRAM], [
480$1
481int
482main (void)
483{
484dnl Do *not* indent the following line: there may be CPP directives.
485dnl Don't move the `;' right after for the same reason.
486$2
487 ;
488 return 0;
489}
490])
491
492dnl #
493dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
494dnl #
495AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
496 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])
fc88a6dd 497 rm -Rf build && mkdir -p build && touch build/conftest.mod.c
c9c0d073 498 echo "obj-m := conftest.o" >build/Makefile
fc88a6dd
ED
499 modpost_flag=''
500 test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
c9c0d073 501 AS_IF(
d75af3c0 502 [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
c9c0d073
BB
503 [$4],
504 [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
505 )
506 rm -Rf build
507])
508
509dnl #
510dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
511dnl #
512AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
513 [ZFS_LINUX_COMPILE_IFELSE(
514 [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
515 [modules],
516 [test -s build/conftest.o],
517 [$3], [$4])
518])
519
520dnl #
521dnl # ZFS_LINUX_CONFIG
522dnl #
523AC_DEFUN([ZFS_LINUX_CONFIG],
524 [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
525 ZFS_LINUX_TRY_COMPILE([
0da78696 526 #include <linux/module.h>
c9c0d073
BB
527 ],[
528 #ifndef CONFIG_$1
529 #error CONFIG_$1 not #defined
530 #endif
531 ],[
532 AC_MSG_RESULT([yes])
533 $2
534 ],[
535 AC_MSG_RESULT([no])
536 $3
537 ])
538])
539
540dnl #
541dnl # ZFS_CHECK_SYMBOL_EXPORT
542dnl # check symbol exported or not
543dnl #
70574182 544AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [
c9c0d073
BB
545 grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
546 $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null
547 rc=$?
70574182 548 if test $rc -ne 0; then
c9c0d073
BB
549 export=0
550 for file in $2; do
70574182
ED
551 grep -q -E "EXPORT_SYMBOL.*($1)" \
552 "$LINUX/$file" 2>/dev/null
c9c0d073 553 rc=$?
70574182 554 if test $rc -eq 0; then
8366cd6a
PS
555 export=1
556 break;
70574182 557 fi
c9c0d073 558 done
70574182 559 if test $export -eq 0; then :
c9c0d073 560 $4
70574182 561 else :
c9c0d073 562 $3
70574182
ED
563 fi
564 else :
c9c0d073 565 $3
70574182
ED
566 fi
567])
568
569dnl #
570dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL
571dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT
572dnl # is called if not compiling for builtin
573dnl #
574AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [
575 ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
576 if test $rc -ne 0; then :
577 $6
578 else
579 if test "x$enable_linux_builtin" != xyes; then
580 ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
581 fi
582 if test $rc -ne 0; then :
583 $6
584 else :
585 $5
586 fi
587 fi
c9c0d073 588])