4 # Set things accordingly for a linux kernel
6 AC_DEFUN([LB_LINUX_VERSION], [
11 AC_CACHE_CHECK([for external module build target], lb_cv_module_target,
13 lb_cv_module_target=""
14 MODULE_TARGET="SUBDIRS"
15 rm -f build/conftest.i
16 LB_LINUX_TRY_MAKE([], [],
17 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
18 [test -s build/conftest.i],
19 [lb_cv_module_target="SUBDIRS"],[
21 makerule="$PWD/build/"
22 LB_LINUX_TRY_MAKE([], [],
23 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
24 [test -s build/conftest.i],
25 [lb_cv_module_target="M54"], [
27 makerule="_module_$PWD/build"
28 LB_LINUX_TRY_MAKE([], [],
29 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
30 [test -s build/conftest.i],
31 [lb_cv_module_target="M"], [
34 LB_LINUX_TRY_MAKE([], [],
35 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
36 [test -s build/conftest.i],
37 [lb_cv_module_target="M58"], [
38 AC_MSG_ERROR([kernel module make failed; check config.log for details])
41 AS_IF([test -z "$lb_cv_module_target"],
42 [AC_MSG_ERROR([unknown external module build target])],
43 [test "x$lb_cv_module_target" = "xM54"],
44 [makerule="$PWD/build"
45 lb_cv_module_target="M"],
46 [test "x$lb_cv_module_target" = "xM58"],
48 lb_cv_module_target="M"],
49 [test "x$lb_cv_module_target" = "xM"],
50 [makerule="_module_$PWD/build"])
51 MODULE_TARGET=$lb_cv_module_target
52 AC_SUBST(MODULE_TARGET)
58 # Determine the Linux kernel version string from the utsrelease
60 AC_DEFUN([LB_LINUX_UTSRELEASE], [
61 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
63 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
64 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
65 utsrelease3=$LINUX_OBJ/include/linux/version.h
66 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
67 [utsrelease=$utsrelease1],
68 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
69 [utsrelease=$utsrelease2],
70 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
71 [utsrelease=$utsrelease3])
72 AS_IF([test -n "$utsrelease"],
73 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
76 Cannot find UTS_RELEASE definition.
78 This is often provided by the kernel-devel package.
82 AS_IF([test -z "$lb_cv_utsrelease"],
83 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
84 LINUXRELEASE=$lb_cv_utsrelease
85 AC_SUBST(LINUXRELEASE)
91 # get the release version of linux
93 AC_DEFUN([LB_LINUX_RELEASE], [
96 # Define default states
100 # And if any of the above kernels has been detected yet
103 # Check for RedHat first (no need to check KERNEL_FOUND
104 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
105 lb_cv_rhel_kernel_version=""
106 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
107 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
108 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
109 '/ RHEL_MINOR / { print [$]3 }' \
110 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
113 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
116 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
120 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
121 LB_CHECK_CONFIG([SUSE_KERNEL], [
128 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
129 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
130 lb_cv_ubuntu_kernel_sig="no"
131 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
132 lb_cv_ubuntu_kernel_sig="yes"
135 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
141 # Check for a ELRepo -ml kernel on RHEL 7/8
142 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
143 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
144 lb_cv_mainline_kernel_sig, [
145 lb_cv_mainline_kernel_sig="no"
146 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
147 lb_cv_mainline_kernel_sig="yes"
149 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
150 lb_cv_mainline_kernel_sig="yes"
153 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
159 # If still no kernel was found, a warning is issued
160 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
161 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE nor Ubuntu])
164 AC_MSG_CHECKING([for Linux kernel module package directory])
165 AC_ARG_WITH([kmp-moddir],
166 AC_HELP_STRING([--with-kmp-moddir=string],
167 [set the kmod updates or extra directory]),
170 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
171 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
172 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
173 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE nor Ubuntu])]
175 IN_KERNEL="${PACKAGE}"])
176 AC_MSG_RESULT($KMP_MODDIR)
178 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
180 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
181 AC_SUBST(modulefsdir)
183 modulenetdir="${moduledir}/net/${IN_KERNEL}"
184 AC_SUBST(modulenetdir)
190 # LB_LINUX_SYMVERFILE
192 # SLES 9 uses a different name for this file - unsure about vanilla kernels
193 # around this version, but it matters for servers only.
194 AC_DEFUN([LB_LINUX_SYMVERFILE], [
195 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
196 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
197 [lb_cv_module_symvers=Modules.symvers],
198 [lb_cv_module_symvers=Module.symvers])
200 SYMVERFILE=$lb_cv_module_symvers
205 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
207 AC_DEFUN([LB_ARG_REPLACE_PATH], [
209 eval set -- $ac_configure_args
213 arg=--with-[$1]=[$2] ;;
215 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
217 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
218 new_configure_args="$new_configure_args '$arg'"
220 ac_configure_args=$new_configure_args
224 # __LB_ARG_CANON_PATH
226 # this is the work-horse of the next function
228 AC_DEFUN([__LB_ARG_CANON_PATH], [
229 [$3]=$(readlink -f $with_$2)
230 LB_ARG_REPLACE_PATH([$1], $[$3])
236 # a front-end for the above function that transforms - and . in the
237 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
239 AC_DEFUN([LB_ARG_CANON_PATH], [
240 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
246 # Find paths for linux, handling kernel-source rpms
248 AC_DEFUN([LB_LINUX_PATH], [
249 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
250 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
252 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
253 PATHS="/lib/modules/$(uname -r)/build"
255 PATHS="/usr/src/linux-headers-$(uname -r)"
257 PATHS+=" $DEFAULT_LINUX"
258 for DEFAULT_LINUX_OBJ in $PATHS; do
259 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
262 AC_MSG_CHECKING([for Linux sources])
264 AC_HELP_STRING([--with-linux=path],
265 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
266 [LB_ARG_CANON_PATH([linux], [LINUX])
267 DEFAULT_LINUX_OBJ=$LINUX],
268 [LINUX=$DEFAULT_LINUX])
269 AC_MSG_RESULT([$LINUX])
272 # -------- check for linux --------
273 LB_CHECK_FILE([$LINUX], [],
274 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
276 # -------- linux objects (for 2.6) --
277 AC_MSG_CHECKING([for Linux objects])
278 AC_ARG_WITH([linux-obj],
279 AC_HELP_STRING([--with-linux-obj=path],
280 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
281 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
282 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
283 AC_MSG_RESULT([$LINUX_OBJ])
286 # -------- check for .config --------
287 AC_ARG_WITH([linux-config],
288 [AC_HELP_STRING([--with-linux-config=path],
289 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
290 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
291 [LINUX_CONFIG=$LINUX_OBJ/.config])
293 # -------- check if .config exists --
294 LB_CHECK_FILE([$LINUX_CONFIG], [],
297 Kernel config could not be found.
300 AC_SUBST(LINUX_CONFIG)
302 LB_CHECK_FILE([/boot/kernel.h],
303 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
304 [LB_CHECK_FILE([/var/adm/running-kernel.h],
305 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
307 AC_ARG_WITH([kernel-source-header],
308 AC_HELP_STRING([--with-kernel-source-header=path],
309 [Use a different kernel version header.]),
310 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
312 # ----------- make dep run? ------------------
313 # at 2.6.19 # $LINUX/include/linux/config.h is removed
314 # and at more old has only one line include <autoconf.h>
316 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
317 [AUTOCONF_HDIR=generated],
318 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
319 [AUTOCONF_HDIR=linux],
320 [AC_MSG_ERROR([Run make config in $LINUX.])])])
321 AC_SUBST(AUTOCONF_HDIR)
323 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
324 [VERSION_HDIR=linux],
325 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
326 [VERSION_HDIR=generated/uapi/linux],
327 [AC_MSG_ERROR([Run make config in $LINUX.])])])
328 AC_SUBST(VERSION_HDIR)
330 # ----------- kconfig.h exists ---------------
331 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
332 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
334 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
335 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
336 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
337 AC_SUBST(CONFIG_INCLUDE)
339 # ------------ rhconfig.h includes runtime-generated bits --
340 # RedHat kernel-source checks
342 # we know this exists after the check above. if the user
343 # tarred up the tree and ran make dep etc. in it, then
344 # version.h gets overwritten with a standard linux one.
346 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
347 # This is a clean kernel-source tree, we need to
348 # enable extensive workarounds to get this to build modules
349 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
350 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
353 Using /boot/kernel.h from RUNNING kernel.
355 If this is not what you want, use --with-kernel-source-header.
356 Consult build/README.kernel-source for details.
361 $KERNEL_SOURCE_HEADER not found.
363 Consult build/README.kernel-source for details.
366 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
369 # this is needed before we can build modules
372 # --- check that we can build modules at all
373 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
377 Kernel modules cannot be built. Consult config.log for details.
379 If you are trying to build with a kernel-source rpm,
380 consult build/README.kernel-source
385 ]) # end of LB_LINUX_PATH
390 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
391 # so we test if request_module is implemented or not
392 AC_DEFUN([LC_MODULE_LOADING], [
393 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
395 #include <linux/kmod.h>
397 int myretval=ENOSYS ;
400 $makerule LUSTRE_KERNEL_TEST=conftest.i
402 grep request_module build/conftest.i |dnl
403 grep -v `grep "int myretval=" build/conftest.i |dnl
404 cut -d= -f2 | cut -d" " -f1`dnl
406 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
408 AS_IF([test "$lb_cv_module_loading" = yes],
409 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
410 [kernel module loading is possible])],
413 Kernel module loading support is highly recommended.
424 AC_DEFUN([LB_PROG_LINUX], [
428 LB_CHECK_CONFIG([MODULES], [], [
431 module support is required to build Lustre kernel modules.
435 LB_CHECK_CONFIG([MODVERSIONS])
444 # Determine if the target is a dpkg system or rpm
446 AC_DEFUN([LB_USES_DPKG], [
447 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
449 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
451 uses_dpkg=$lb_cv_uses_dpkg
457 # check symbol exported or not
459 # $2 - file(s) for find.
463 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
465 AC_DEFUN([LB_CHECK_EXPORT], [
466 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
467 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
468 AS_VAR_SET([lb_export], [no])
469 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
470 [AS_VAR_SET([lb_export], [yes])],
472 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
473 AS_VAR_SET([lb_export], [yes])
478 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
479 AS_VAR_POPDEF([lb_export])dnl
485 # check if a given config option is defined
490 AC_DEFUN([LB_CHECK_CONFIG], [
491 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
493 #include <$AUTOCONF_HDIR/autoconf.h>
496 #error CONFIG_$1 not #defined
504 # check if a given config option is builtin or as module
505 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
509 AC_DEFUN([LB_CHECK_CONFIG_IM], [
510 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
512 #include <$AUTOCONF_HDIR/autoconf.h>
514 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
515 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
518 ]) # LB_CHECK_CONFIG_IM
521 # these are like AC_TRY_COMPILE, but try to build modules against the
522 # kernel, inside the build directory
526 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
527 # --------------------------------------
529 m4_define([LB_LANG_PROGRAM],
531 #include <linux/kernel.h>
532 #include <linux/module.h>
534 #if defined(NEED_LOCKDEP_IS_HELD_DISCARD_CONST) \
535 && defined(CONFIG_LOCKDEP) \
536 && defined(lockdep_is_held)
537 #undef lockdep_is_held
538 #define lockdep_is_held(lock) \
539 lock_is_held((struct lockdep_map *)&(lock)->dep_map)
546 dnl Do *not* indent the following line: there may be CPP directives.
547 dnl Don't move the `;' right after for the same reason.
552 MODULE_LICENSE("GPL");])
555 # LB_LINUX_COMPILE_IFELSE
557 # like AC_COMPILE_IFELSE
559 # $1 - AC_LANG_SOURCE()
565 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
566 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
567 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
568 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc.*/powerpc/' -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/' -e 's/aarch64.*/arm64/' -e 's/armv7.*/arm/')
569 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] LDFLAGS= ${LD:+LD="$LD"} CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_CHECK_INCLUDE -I$LINUX/arch/$SUBARCH/include -Iinclude -Iarch/$SUBARCH/include/generated -I$LINUX/include -Iinclude2 -I$LINUX/include/uapi -Iinclude/generated -I$LINUX/arch/$SUBARCH/include/uapi -Iarch/$SUBARCH/include/generated/uapi -I$LINUX/include/uapi -Iinclude/generated/uapi ${SPL_OBJ:+-include $SPL_OBJ/spl_config.h} ${ZFS_OBJ:+-include $ZFS_OBJ/zfs_config.h} ${SPL:+-I$SPL/include } ${ZFS:+-I$ZFS -I$ZFS/include -I$ZFS/include/os/linux/kernel -I$ZFS/include/os/linux/spl -I$ZFS/include/os/linux/zfs -I${SPL:-$ZFS/include/spl}} -include $CONFIG_INCLUDE" KBUILD_EXTRA_SYMBOLS="${ZFS_OBJ:+$ZFS_OBJ/Module.symvers} $KBUILD_EXTRA_SYMBOLS" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
571 [_AC_MSG_LOG_CONFTEST
572 m4_ifvaln([$5],[$5])dnl])
573 rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl
577 # LB_LINUX_TRY_COMPILE
579 # like AC_TRY_COMPILE
581 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
582 LB_LINUX_COMPILE_IFELSE(
583 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
584 [modules], [test -s build/conftest.o],
591 # like LB_LINUX_TRY_COMPILE, but with different arguments
593 AC_DEFUN([LB_LINUX_TRY_MAKE], [
594 LB_LINUX_COMPILE_IFELSE(
595 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
596 [$3], [$4], [$5], [$6])
601 # $1 - checking message
608 AC_DEFUN([LB_CHECK_COMPILE], [
609 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
610 AC_CACHE_CHECK([$1], lb_compile, [
611 LB_LINUX_TRY_COMPILE([$3], [$4],
612 [AS_VAR_SET([lb_compile], [yes])],
613 [AS_VAR_SET([lb_compile], [no])])
615 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
616 AS_VAR_POPDEF([lb_compile])dnl
617 ]) # LB_CHECK_COMPILE
620 # LB_CHECK_LINUX_HEADER
622 # Like AC_CHECK_HEADER but checks for a kernel-space header
624 m4_define([LB_CHECK_LINUX_HEADER], [
625 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
626 AC_CACHE_CHECK([for $1], lb_header, [
627 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
628 [modules], [test -s build/conftest.o],
629 [AS_VAR_SET([lb_header], [yes])],
630 [AS_VAR_SET([lb_header], [no])])
632 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
633 AS_VAR_POPDEF([lb_header])dnl
634 ]) # LB_CHECK_LINUX_HEADER
636 # ------------------------------------------------------------------------------
637 # Support 2 stage: parallel compile then checked test results
638 # Heavily inspired by OpenZFS
640 AC_DEFUN([LB2_LINUX_CONFTEST_C], [
641 test -d ${TEST_DIR}/$2 || mkdir -p ${TEST_DIR}/$2
642 cat confdefs.h - <<_EOF >${TEST_DIR}/$2/$2.c
648 # LB2_LINUX_CONFTEST_MAKEFILE
650 # $1 - *unique* test case name
651 # $2 - additional build flags (ccflags)
652 # $3 - external kernel includes for lnet o2ib|gni
654 AC_DEFUN([LB2_LINUX_CONFTEST_MAKEFILE], [
655 test -d ${TEST_DIR} || mkdir -p ${TEST_DIR}
656 test -d ${TEST_DIR}/$1 || mkdir -p ${TEST_DIR}/$1
658 file=${TEST_DIR}/$1/Makefile
662 # Example command line to manually build source
663 # make modules -C $LINUX_OBJ $ARCH_UM M=${TEST_DIR}/$1
672 LINUXINCLUDE = $EXT_INCLUDE
673 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include
674 LINUXINCLUDE += -Iinclude -Iarch/$SUBARCH/include/generated
675 LINUXINCLUDE += -I$LINUX/include
676 LINUXINCLUDE += -Iinclude2
677 LINUXINCLUDE += -I$LINUX/include/uapi
678 LINUXINCLUDE += -Iinclude/generated
679 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include/uapi
680 LINUXINCLUDE += -Iarch/$SUBARCH/include/generated/uapi
681 LINUXINCLUDE += -I$LINUX/include/uapi -Iinclude/generated/uapi
683 LINUXINCLUDE += -include \$(SOBJ)/spl_config.h
686 LINUXINCLUDE += -include \$(ZOBJ)/zfs_config.h
689 LINUXINCLUDE += -I\$(SINC)/include
692 LINUXINCLUDE += -I\$(ZINC) -I\$(ZINC)/include
694 LINUXINCLUDE += -I\$(SINC)
696 LINUXINCLUDE += -I\$(ZINC)/include/spl
699 LINUXINCLUDE += -include $CONFIG_INCLUDE
700 KBUILD_EXTRA_SYMBOLS=${ZFS_OBJ:+$ZFS_OBJ/Module.symvers}
702 ccflags-y := -Werror-implicit-function-declaration
705 # Additional custom CFLAGS as requested.
706 m4_ifval($2, [echo "ccflags-y += $2" >>$file], [])
709 echo "obj-m := $1.o" >>$file
710 echo "obj-m += $1/" >>${TEST_DIR}/Makefile
722 # Used internally by LB2_LINUX_TEST_COMPILE
724 AC_DEFUN([LB2_LINUX_COMPILE], [
726 KBUILD_MODPOST_NOFINAL="yes"
727 make modules -k -j$TEST_JOBS -C $LINUX_OBJ $ARCH_UM
728 M=$1 >$1/build.log 2>&1])
729 AS_IF([AC_TRY_COMMAND([$2])], [$3], [$4])
733 # LB2_LINUX_TEST_COMPILE
735 # Perform a full compile excluding the final modpost phase.
739 AC_DEFUN([LB2_LINUX_TEST_COMPILE], [
740 LB2_LINUX_COMPILE([$2], [test -f $2/build.log], [
741 mv $2/Makefile $2/Makefile.compile.$1
742 mv $2/build.log $2/build.log.$1
745 *** Unable to compile test source to determine kernel interfaces.])
750 # Perform the compilation of the test cases in two phases.
752 # Phase 1) attempt to build the object files for all of the tests
753 # defined by the LB2_LINUX_TEST_SRC macro.
755 # Phase 2) disable all tests which failed the initial compilation.
757 # This allows us efficiently build the test cases in parallel while
758 # remaining resilient to build failures which are expected when
759 # detecting the available kernel interfaces.
761 # The maximum allowed parallelism can be controlled by setting the
762 # TEST_JOBS environment variable which defaults to $(nproc).
764 AC_DEFUN([LB2_LINUX_TEST_COMPILE_ALL], [
765 # Phase 1 - Compilation only, final linking is skipped.
766 LB2_LINUX_TEST_COMPILE([$1], [${TEST_DIR}])
768 for dir in $(awk '/^obj-m/ { print [$]3 }' \
769 ${TEST_DIR}/Makefile.compile.$1); do
771 AS_IF([test -f ${TEST_DIR}/$name/$name.o], [
772 touch ${TEST_DIR}/$name/$name.ko
784 # $5 - external include paths
786 # NOTICE as all of the test cases are compiled in parallel tests may not
787 # depend on the results other tests.
788 # Each test needs resolve any external dependencies at the time the program
789 # source is generated.
791 AC_DEFUN([LB2_LINUX_TEST_SRC], [
792 LB2_LINUX_CONFTEST_C([LB_LANG_PROGRAM([[$2]], [[$3]])], [$1_pc])
793 LB2_LINUX_CONFTEST_MAKEFILE([$1_pc], [$4], [$5])
797 # LB2_LINUX_TEST_RESULT
799 # $1 - *unique* name matching the LB2_LINUX_TEST_SRC macro
800 # $2 - run on success (valid .ko generated)
801 # $3 - run on failure (unable to compile)
803 AC_DEFUN([LB2_LINUX_TEST_RESULT], [
804 AS_IF([test -d ${TEST_DIR}/$1_pc], [
805 AS_IF([test -f ${TEST_DIR}/$1_pc/$1_pc.ko], [$2], [$3])
808 *** No matching source for the "$1" test, check that
809 *** both the test source and result macros refer to the same name.