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 rm -f build/conftest.i
17 LB_LINUX_TRY_MAKE([], [],
18 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
19 [test -s build/conftest.i],
20 [lb_cv_module_target="M54"], [
22 makerule="_module_$PWD/build"
23 LB_LINUX_TRY_MAKE([], [],
24 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
25 [test -s build/conftest.i],
26 [lb_cv_module_target="M"], [
29 LB_LINUX_TRY_MAKE([], [],
30 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
31 [test -s build/conftest.i],
32 [lb_cv_module_target="M58"], [
34 lb_cv_dequote_CC_VERSION_TEXT=yes
35 LB_LINUX_TRY_MAKE([], [],
36 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
37 [test -s build/conftest.i],
38 [lb_cv_module_target="M517"], [
39 AC_MSG_ERROR([kernel module make failed; check config.log for details])
42 # Linux commit v5.16-rc3-26-g129ab0d2d9f3
43 # added quotes around "$(CONFIG_CC_VERSION_TEXT)", however .config stores
44 # CONFIG_CC_VERSION_TEXT with quotes thus breaking the GNU make Makefile
45 # for external modules.
46 # Workaround by providing a non-quoted value to override the value in .config
47 unset lb_cv_dequote_CC_VERSION_TEXT
48 AC_CACHE_CHECK([for compiler version text], lb_cv_dequote_CC_VERSION_TEXT, [
49 AS_IF([test "x$lb_cv_module_target" = "xM517"],
50 [lb_cv_dequote_CC_VERSION_TEXT=yes],
51 [lb_cv_dequote_CC_VERSION_TEXT=yes])
53 AS_IF([test -z "$lb_cv_module_target"],
54 [AC_MSG_ERROR([unknown external module build target])],
55 [test "x$lb_cv_module_target" = "xM54"],
56 [makerule="$PWD/build"
57 lb_cv_module_target="M"],
58 [test "x$lb_cv_module_target" = "xM58"],
60 lb_cv_module_target="M"],
61 [test "x$lb_cv_module_target" = "xM517"],
63 lb_cv_module_target="M"],
64 [test "x$lb_cv_module_target" = "xM"],
65 [makerule="_module_$PWD/build"])
66 MODULE_TARGET=$lb_cv_module_target
67 AC_SUBST(MODULE_TARGET)
73 # Determine the Linux kernel version string from the utsrelease
75 AC_DEFUN([LB_LINUX_UTSRELEASE], [
76 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
78 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
79 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
80 utsrelease3=$LINUX_OBJ/include/linux/version.h
81 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
82 [utsrelease=$utsrelease1],
83 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
84 [utsrelease=$utsrelease2],
85 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
86 [utsrelease=$utsrelease3])
87 AS_IF([test -n "$utsrelease"],
88 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
91 Cannot find UTS_RELEASE definition.
93 This is often provided by the kernel-devel package.
97 AS_IF([test -z "$lb_cv_utsrelease"],
98 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
99 LINUXRELEASE=$lb_cv_utsrelease
100 AC_SUBST(LINUXRELEASE)
106 # get the release version of linux
108 AC_DEFUN([LB_LINUX_RELEASE], [
111 # Define default states
116 OPENEULER_KERNEL="no"
117 # And if any of the above kernels has been detected yet
120 # Check for RedHat first (no need to check KERNEL_FOUND
121 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
122 lb_cv_rhel_kernel_version=""
123 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
124 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
125 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
126 '/ RHEL_MINOR / { print [$]3 }' \
127 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
130 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
133 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
137 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
138 LB_CHECK_CONFIG([SUSE_KERNEL], [
145 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
146 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
147 lb_cv_ubuntu_kernel_sig="no"
148 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
149 lb_cv_ubuntu_kernel_sig="yes"
152 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
158 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
159 AC_CACHE_CHECK([for Debian kernel signature], lb_cv_debian_kernel_sig, [
160 lb_cv_debian_kernel_sig="no"
161 AS_IF([grep -q "LINUX_PACKAGE_ID\s*\"\s*Debian" $LINUX_OBJ/include/generated/package.h], [
162 lb_cv_debian_kernel_sig="yes"
165 AS_IF([test "x$lb_cv_debian_kernel_sig" = "xyes"], [
171 # Check for a ELRepo -ml kernel on RHEL 7/8
172 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
173 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
174 lb_cv_mainline_kernel_sig, [
175 lb_cv_mainline_kernel_sig="no"
176 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
177 lb_cv_mainline_kernel_sig="yes"
179 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
180 lb_cv_mainline_kernel_sig="yes"
182 AS_IF([fgrep -q '.el9.' $LINUX_OBJ/include/generated/utsrelease.h], [
183 lb_cv_mainline_kernel_sig="yes"
186 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
192 # Check for openEuler
193 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
194 AC_CACHE_CHECK([for openEuler kernel version number], lb_cv_openeuler_kernel_version, [
195 lb_cv_openeuler_kernel_version=""
196 AS_IF([fgrep -q OPENEULER_VERSION $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
197 lb_cv_openeuler_kernel_version=$(awk '/ OPENEULER_MAJOR / { print [$]3 }' \
198 $LINUX_OBJ/include/$VERSION_HDIR/version.h).$(awk \
199 '/ OPENEULER_MINOR / { print [$]3 }' \
200 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
203 AS_IF([test -n "$lb_cv_openeuler_kernel_version"], [
204 OPENEULER_KERNEL="yes"
206 OPENEULER_VERSION_NO=$lb_cv_openeuler_kernel_version
210 # If still no kernel was found, a warning is issued
211 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
212 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler, Ubuntu nor Debian])
215 AC_MSG_CHECKING([for Linux kernel module package directory])
216 AC_ARG_WITH([kmp-moddir],
217 AS_HELP_STRING([--with-kmp-moddir=string],
218 [set the kmod updates or extra directory]),
221 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
222 [test x$OPENEULER_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
223 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
224 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
225 [test x$DEBIAN_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
226 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler, Ubuntu nor Debian])]
228 IN_KERNEL="${PACKAGE}"])
229 AC_MSG_RESULT($KMP_MODDIR)
231 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
233 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
234 AC_SUBST(modulefsdir)
236 modulenetdir="${moduledir}/net/${IN_KERNEL}"
237 AC_SUBST(modulenetdir)
243 # LB_LINUX_SYMVERFILE
245 # SLES 9 uses a different name for this file - unsure about vanilla kernels
246 # around this version, but it matters for servers only.
247 AC_DEFUN([LB_LINUX_SYMVERFILE], [
248 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
249 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
250 [lb_cv_module_symvers=Modules.symvers],
251 [lb_cv_module_symvers=Module.symvers])
253 SYMVERFILE=$lb_cv_module_symvers
258 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
260 AC_DEFUN([LB_ARG_REPLACE_PATH], [
262 eval set -- $ac_configure_args
266 arg=--with-[$1]=[$2] ;;
268 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
270 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
271 new_configure_args="$new_configure_args '$arg'"
273 ac_configure_args=$new_configure_args
277 # __LB_ARG_CANON_PATH
279 # this is the work-horse of the next function
281 AC_DEFUN([__LB_ARG_CANON_PATH], [
282 [$3]=$(readlink -f $with_$2)
283 LB_ARG_REPLACE_PATH([$1], $[$3])
289 # a front-end for the above function that transforms - and . in the
290 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
292 AC_DEFUN([LB_ARG_CANON_PATH], [
293 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
299 # Find paths for linux, handling kernel-source rpms
301 AC_DEFUN([LB_LINUX_PATH], [
302 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
303 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
305 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
306 PATHS="/lib/modules/$(uname -r)/build"
308 PATHS="/usr/src/linux-headers-$(uname -r)"
310 PATHS+=" $DEFAULT_LINUX"
311 for DEFAULT_LINUX_OBJ in $PATHS; do
312 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
315 AC_MSG_CHECKING([for Linux sources])
317 AS_HELP_STRING([--with-linux=path],
318 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
319 [LB_ARG_CANON_PATH([linux], [LINUX])
320 DEFAULT_LINUX_OBJ=$LINUX],
321 [LINUX=$DEFAULT_LINUX])
322 AC_MSG_RESULT([$LINUX])
324 # -------- check for linux --------
325 LB_CHECK_FILE([$LINUX], [],
326 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
328 # -------- linux objects (for 2.6) --
329 AC_MSG_CHECKING([for Linux objects])
330 AC_ARG_WITH([linux-obj],
331 AS_HELP_STRING([--with-linux-obj=path],
332 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
333 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
334 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
335 AC_MSG_RESULT([$LINUX_OBJ])
337 ## -------- with linux should point to <kernel>-common on Debian
338 AS_IF([test ${LINUX} == ${LINUX_OBJ} -a ${LINUX} == $(realpath ${LINUX})],[
339 this_arch=$(realpath ${LINUX} | sed 's/-/\n/g' | tail -1)
340 linux_headers_common=$(realpath ${LINUX}|sed "s/-${this_arch}\$/-common/g")
341 AS_IF([test "${this_arch}" != common],[
342 _cah="${linux_headers_common}/include/linux/compiler_attributes.h"
343 _cgh="${linux_headers_common}/include/linux/compiler-gcc.h"
344 AS_IF([test -f "${_cah}" -o -f "${_cgh}"],[
345 AC_MSG_WARN([Setting LINUX to ${linux_headers_common} was ${LINUX}])
346 LINUX=${linux_headers_common}])
351 # -------- check for .config --------
352 AC_ARG_WITH([linux-config],
353 [AS_HELP_STRING([--with-linux-config=path],
354 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
355 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
356 [LINUX_CONFIG=$LINUX_OBJ/.config])
358 # -------- check if .config exists --
359 LB_CHECK_FILE([$LINUX_CONFIG], [],
362 Kernel config could not be found.
365 AC_SUBST(LINUX_CONFIG)
367 LB_CHECK_FILE([/boot/kernel.h],
368 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
369 [LB_CHECK_FILE([/var/adm/running-kernel.h],
370 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
372 AC_ARG_WITH([kernel-source-header],
373 AS_HELP_STRING([--with-kernel-source-header=path],
374 [Use a different kernel version header.]),
375 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
377 # ----------- make dep run? ------------------
378 # at 2.6.19 # $LINUX/include/linux/config.h is removed
379 # and at more old has only one line include <autoconf.h>
381 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
382 [AUTOCONF_HDIR=generated],
383 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
384 [AUTOCONF_HDIR=linux],
385 [AC_MSG_ERROR([Run make config in $LINUX.])])])
386 AC_SUBST(AUTOCONF_HDIR)
388 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
389 [VERSION_HDIR=linux],
390 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
391 [VERSION_HDIR=generated/uapi/linux],
392 [AC_MSG_ERROR([Run make config in $LINUX.])])])
393 AC_SUBST(VERSION_HDIR)
395 # ----------- kconfig.h exists ---------------
396 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
397 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
399 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
400 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
401 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
402 AC_SUBST(CONFIG_INCLUDE)
404 # ------------ rhconfig.h includes runtime-generated bits --
405 # RedHat kernel-source checks
407 # we know this exists after the check above. if the user
408 # tarred up the tree and ran make dep etc. in it, then
409 # version.h gets overwritten with a standard linux one.
411 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
412 # This is a clean kernel-source tree, we need to
413 # enable extensive workarounds to get this to build modules
414 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
415 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
418 Using /boot/kernel.h from RUNNING kernel.
420 If this is not what you want, use --with-kernel-source-header.
421 Consult build/README.kernel-source for details.
426 $KERNEL_SOURCE_HEADER not found.
428 Consult build/README.kernel-source for details.
431 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
434 AS_IF([test -n SUBARCH],
435 [SUBARCH=$(echo $target_cpu | sed -e 's/powerpc.*/powerpc/' -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/' -e 's/aarch64.*/arm64/' -e 's/armv7.*/arm/')
438 # this is needed before we can build modules
441 # --- Parallel config for kernel v5.17+
442 AS_IF([test "x$lb_cv_dequote_CC_VERSION_TEXT" = "xyes"], [
443 CC_VERSION_TEXT=$($CC --version | head -n1 | tr ' ()' '.')
444 MAKE_KMOD_ENV="CONFIG_CC_VERSION_TEXT='$CC_VERSION_TEXT'"])
446 # --- check that we can build modules at all
447 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
451 Kernel modules cannot be built. Consult config.log for details.
453 If you are trying to build with a kernel-source rpm,
454 consult build/README.kernel-source
459 ]) # end of LB_LINUX_PATH
464 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
465 # so we test if request_module is implemented or not
466 AC_DEFUN([LC_MODULE_LOADING], [
467 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
469 #include <linux/kmod.h>
471 int myretval=ENOSYS ;
474 $makerule LUSTRE_KERNEL_TEST=conftest.i
476 grep request_module build/conftest.i |dnl
477 grep -v `grep "int myretval=" build/conftest.i |dnl
478 cut -d= -f2 | cut -d" " -f1`dnl
480 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
482 AS_IF([test "$lb_cv_module_loading" = yes],
483 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
484 [kernel module loading is possible])],
487 Kernel module loading support is highly recommended.
493 AC_DEFUN([LB_PROG_LINUX_SRC], [
494 LB2_SRC_CHECK_CONFIG([MODULES])
495 LB2_SRC_CHECK_CONFIG([MODVERSIONS])
498 AC_DEFUN([LB_PROG_LINUX_RESULTS], [
499 LB2_TEST_CHECK_CONFIG([MODULES], [], [AC_MSG_ERROR(
500 [module support is required to build Lustre kernel modules.])
502 LB2_TEST_CHECK_CONFIG([MODVERSIONS],[],[])
510 AC_DEFUN([LB_PROG_LINUX], [
520 # Determine if the target is a dpkg system or rpm
522 AC_DEFUN([LB_USES_DPKG], [
523 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
525 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
527 uses_dpkg=$lb_cv_uses_dpkg
533 # check symbol exported or not
535 # $2 - file(s) for find.
539 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
541 AC_DEFUN([LB_CHECK_EXPORT], [
542 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
543 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
544 AS_VAR_SET([lb_export], [no])
545 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
546 [AS_VAR_SET([lb_export], [yes])],
548 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
549 AS_VAR_SET([lb_export], [yes])
554 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
555 AS_VAR_POPDEF([lb_export])dnl
561 # check if a given config option is defined
566 AC_DEFUN([LB_CHECK_CONFIG], [
567 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
569 #include <$AUTOCONF_HDIR/autoconf.h>
572 #error CONFIG_$1 not #defined
580 # check if a given config option is builtin or as module
581 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
585 AC_DEFUN([LB_CHECK_CONFIG_IM], [
586 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
588 #include <$AUTOCONF_HDIR/autoconf.h>
590 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
591 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
594 ]) # LB_CHECK_CONFIG_IM
597 # these are like AC_TRY_COMPILE, but try to build modules against the
598 # kernel, inside the build directory
602 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
603 # --------------------------------------
605 m4_define([LB_LANG_PROGRAM],
607 #include <linux/kernel.h>
608 #include <linux/module.h>
610 #if defined(NEED_LOCKDEP_IS_HELD_DISCARD_CONST) \
611 && defined(CONFIG_LOCKDEP) \
612 && defined(lockdep_is_held)
613 #undef lockdep_is_held
614 #define lockdep_is_held(lock) \
615 lock_is_held((struct lockdep_map *)&(lock)->dep_map)
622 dnl Do *not* indent the following line: there may be CPP directives.
623 dnl Don't move the `;' right after for the same reason.
628 MODULE_LICENSE("GPL");])
631 # LB_LINUX_COMPILE_IFELSE
633 # like AC_COMPILE_IFELSE
635 # $1 - AC_LANG_SOURCE()
641 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
642 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
643 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
644 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] DEQUOTE_CC_VERSION_TEXT=$lb_cv_dequote_CC_VERSION_TEXT 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])],
646 [_AC_MSG_LOG_CONFTEST
647 m4_ifvaln([$5],[$5])dnl])
648 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
652 # LB_LINUX_TRY_COMPILE
654 # like AC_TRY_COMPILE
656 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
657 LB_LINUX_COMPILE_IFELSE(
658 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
659 [modules], [test -s build/conftest.o],
666 # like LB_LINUX_TRY_COMPILE, but with different arguments
668 AC_DEFUN([LB_LINUX_TRY_MAKE], [
669 LB_LINUX_COMPILE_IFELSE(
670 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
671 [$3], [$4], [$5], [$6])
676 # $1 - checking message
683 AC_DEFUN([LB_CHECK_COMPILE], [
684 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
685 AC_CACHE_CHECK([$1], lb_compile, [
686 LB_LINUX_TRY_COMPILE([$3], [$4],
687 [AS_VAR_SET([lb_compile], [yes])],
688 [AS_VAR_SET([lb_compile], [no])])
690 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
691 AS_VAR_POPDEF([lb_compile])dnl
692 ]) # LB_CHECK_COMPILE
695 # LB_CHECK_LINUX_HEADER
697 # Like AC_CHECK_HEADER but checks for a kernel-space header
699 AC_DEFUN([LB_CHECK_LINUX_HEADER], [
700 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])
701 AC_CACHE_CHECK([for $1], lb_header, [
702 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
703 [modules], [test -s build/conftest.o],
704 [AS_VAR_SET([lb_header], [yes])],
705 [AS_VAR_SET([lb_header], [no])])
707 AS_VAR_IF([lb_header], [yes], [$2], [$3])
708 AS_VAR_POPDEF([lb_header])
709 ]) # LB_CHECK_LINUX_HEADER
711 # ------------------------------------------------------------------------------
712 # Support 2 stage: parallel compile then checked test results
713 # Heavily inspired by OpenZFS
715 # When converting tests from an LB_CHECK_COMPILE to use an
716 # LB2_LINUX_TEST_SRC and LB2_LINUX_TEST_RESULT pairing the primary
717 # consideration if dependencies on the results of LB2_LINUX_TEST_RESULT
718 # or LB2_TEST_CHECK_CONFIG[_IM] are used by annother compile test.
719 # Such dependencies should be avoided without a clear understanding
720 # of when the test result is actually available.
721 # The serial LB_CHECK_* test produces immediate results
722 # where as the LB2_ variant is not available until an intermediate
723 # LB2_LINUX_TEST_COMPILE_ALL has been executed.
725 # Currently all of the non-conditional LB_CHECK_COMPILE and
726 # LB_CHECK_CONFIG[_IM] cases are executed before any of the
727 # LB2_LINUX_TEST_SRC, or LB2_SRC_CHECK_CONFIG[_IM] code snippets
728 # are written. [Reference LB_CONFIG_MODULES for more details]
730 # This allows such LB2_*_SRC_* test cases to rely on
731 # prior LB_CHECK_* results, provided such results are preserved
732 # in the global configure name space. Likewise an LB2_LINUX_TEST_RESULT
733 # or LB2_TEST_CHECK_CONFIG[_IM] may conditionally execute a further
734 # LB_CHECK_* if required. Although it would be typcially be faster
735 # to run a few compile tests and conditionally ignore the results
736 # the reduced configure time may not always out weight the added
739 # It is worth noting that the LB_CHECK_COMPILE macros second argument
740 # is used as the configure test cache name. While is has been important
741 # that this name be globally unique it is even more important in the
742 # parallel case. The is somewhat alleviated by the sanity check in the
743 # LB2_LINUX_TEST_RESULT macro as it will abort with an error if
744 # the cache name does not exist. However care should be taken
745 # that the cache name is a globally unique identifier.
747 # Non-unique cases that are otherwise correct can be identified in the
748 # configure output when a results include ".. (cached)". This indicates
749 # either a duplicate LB_CHECK_* execution which is not critical or a
750 # duplicate identifier which needs to be corrected.
752 # At this point the number of LB_ and LB2_ examples should be
753 # sufficient for the casual developer to perform cut-paste-modify
754 # without serious confusion or complication.
755 # ------------------------------------------------------------------------------
757 AC_DEFUN([LB2_LINUX_CONFTEST_C], [
758 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
759 test -d ${TEST_DIR}/$1_pc || mkdir -p ${TEST_DIR}/$1_pc
760 cat confdefs.h - <<_EOF >${TEST_DIR}/$1_pc/$1_pc.c
766 # LB2_LINUX_CONFTEST_MAKEFILE
768 # $1 - *unique* test case name
769 # $2 - additional build flags (ccflags)
770 # $3 - external kernel includes for lnet o2ib|gni
771 # $4 - extra symbol in Psuedo.symvers (optional)
773 AC_DEFUN([LB2_LINUX_CONFTEST_MAKEFILE], [
774 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
775 test -d ${TEST_DIR} || mkdir -p ${TEST_DIR}
776 test -d ${TEST_DIR}/$1_pc || mkdir -p ${TEST_DIR}/$1_pc
778 file=${TEST_DIR}/$1_pc/Makefile
782 if test "${EXT_SYMBOL}x" != "x" ; then
783 PSYM_FILE=${TEST_DIR}/$1_pc/Psuedo.symvers
784 echo -e "0x12345678\t${EXT_SYMBOL}\tvmlinux\tEXPORT_SYMBOL\t" > ${PSYM_FILE}
787 if test "x$O2IBPATH" != "x"; then
788 if test "x$O2IBPATH" != "x$LINUX_OBJ"; then
789 XTRA_SYM="$O2IBPATH/Module.symvers"
794 # Example command line to manually build source
795 # make modules -C $LINUX_OBJ $ARCH_UM M=${TEST_DIR}/$1_pc $MAKE_KMOD_ENV
805 LINUXINCLUDE = $EXT_INCLUDE
806 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include
807 LINUXINCLUDE += -Iinclude -Iarch/$SUBARCH/include/generated
808 LINUXINCLUDE += -I$LINUX/include
809 LINUXINCLUDE += -Iinclude2
810 LINUXINCLUDE += -I$LINUX/include/uapi
811 LINUXINCLUDE += -Iinclude/generated
812 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include/uapi
813 LINUXINCLUDE += -Iarch/$SUBARCH/include/generated/uapi
814 LINUXINCLUDE += -I$LINUX/include/uapi -Iinclude/generated/uapi
816 LINUXINCLUDE += -include \$(SOBJ)/spl_config.h
819 LINUXINCLUDE += -include \$(ZOBJ)/zfs_config.h
822 LINUXINCLUDE += -I\$(SINC)/include
825 LINUXINCLUDE += -I\$(ZINC) -I\$(ZINC)/include
827 LINUXINCLUDE += -I\$(SINC)
829 LINUXINCLUDE += -I\$(ZINC)/include/spl
832 LINUXINCLUDE += -include $CONFIG_INCLUDE
833 KBUILD_EXTRA_SYMBOLS += ${ZFS_OBJ:+$ZFS_OBJ/Module.symvers}
834 KBUILD_EXTRA_SYMBOLS += ${XTRA_SYM}
836 KBUILD_EXTRA_SYMBOLS += \$(PSYM)
839 ccflags-y := -Werror-implicit-function-declaration
842 # Additional custom CFLAGS as requested.
843 m4_ifval($2, [echo "ccflags-y += $2" >>$file], [])
846 echo "obj-m := $1_pc.o" >>$file
848 # Include the test case in the build, only if the result is not cached
849 AS_VAR_PUSHDEF([lb2_cache_name], [lb_cv_test_$1])
850 AS_IF(AS_VAR_TEST_SET(lb2_cache_name), [], [
851 echo "obj-m += $1_pc/" >>${TEST_DIR}/Makefile
852 LB2_MODULES_COUNT=$((LB2_MODULES_COUNT + 1))
854 AS_VAR_POPDEF([lb2_cache_name])
858 # LB2_LINUX_TEST_COMPILE
860 # Perform a full compile excluding the final modpost phase.
864 AC_DEFUN([LB2_LINUX_TEST_COMPILE], [
867 J=${TEST_JOBS:-$(nproc)}
869 AC_MSG_NOTICE([KBUILD_MODPOST_NOFINAL="yes" make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV])
871 AC_TRY_COMMAND([KBUILD_MODPOST_NOFINAL="yes"
872 make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV >${L} 2>&1])
873 AS_IF([test -f ${L}],
874 [AS_IF([test -f $2/Makefile],
875 [mv $2/Makefile $2/Makefile.compile.$1])],
876 [AC_MSG_ERROR([*** Unable to compile test source ... $3])
881 # Perform the compilation of the test cases in two phases.
883 # Phase 1) attempt to build the object files for all of the tests
884 # defined by the LB2_LINUX_TEST_SRC macro.
886 # Phase 2) disable all tests which failed the initial compilation.
888 # This allows us efficiently build the test cases in parallel while
889 # remaining resilient to build failures which are expected when
890 # detecting the available kernel interfaces.
892 # The maximum allowed parallelism can be controlled by setting the
893 # TEST_JOBS environment variable which defaults to $(nproc).
895 AC_DEFUN([LB2_LINUX_TEST_COMPILE_ALL], [
896 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
897 # Phase 1 - Compilation only, final linking is skipped.
898 AS_IF([test $((LB2_MODULES_COUNT + 0)) -gt 0], [
899 AC_MSG_NOTICE([building ${LB2_MODULES_COUNT} linux kernel compile tests for '$1'])
900 LB2_LINUX_TEST_COMPILE([$1], [${TEST_DIR}], [$2])
901 for dir in $(awk '/^obj-m/ { print [$]3 }' \
902 ${TEST_DIR}/Makefile.compile.$1); do
904 touch ${TEST_DIR}/$name/$name.tested
908 AC_MSG_NOTICE([all linux kernel compile test results for '$1' are in-cache])
919 # $5 - external include paths
920 # $6 - fake symvers entry
922 # NOTICE as all of the test cases are compiled in parallel tests may not
923 # depend on the results other tests.
924 # Each test needs resolve any external dependencies at the time the program
925 # source is generated.
927 AC_DEFUN([LB2_LINUX_TEST_SRC], [
928 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
929 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$1])
930 # Skip test write and build steps if the result is already known.
931 LB2_LINUX_CONFTEST_C([$1], [LB_LANG_PROGRAM([[$2]], [[$3]])])
932 LB2_LINUX_CONFTEST_MAKEFILE([$1], [$4], [$5], [$6])
933 AS_VAR_POPDEF([lb_test])
937 # LB2_MSG_LINUX_TEST_RESULT
940 # $2 - *unique* name matching the LB2_LINUX_TEST_SRC macro
941 # $3 - run on success (valid .ko generated)
942 # $4 - run on failure (unable to compile)
945 AC_DEFUN([LB2_MSG_LINUX_TEST_RESULT],[
946 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
947 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$2])
948 D="$(realpath ${TEST_DIR})"
951 AS_IF([test -d ${T}], [
952 # test source exists, was the compile test run?
953 AS_IF(AS_VAR_TEST_SET(lb_test), [], [
954 AS_IF([test -f ${O}.tested],[
955 # compile test was run.
957 # compile test was NOT run. Re-compile everything.
958 AC_MSG_NOTICE([** Rebuilding all tests **])
960 J=${TEST_JOBS:-$(nproc)}
961 for mf in $(ls -1 ${TEST_DIR}/Makefile.compile.*); do
962 ln -sf $mf ${D}/Makefile
963 KBUILD_MODPOST_NOFINAL="yes"
964 make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV >> rebuild.log 2>&1
965 for dir in $(awk '/^obj-m/ { print [$]3 }' ${D}/$mf); do
967 AC_MSG_NOTICE([touch ${D}/$name/$name.tested])
968 touch ${D}/$name/$name.tested
972 # compile test was NOT run. Re-compile everything.
975 # test source does not exist:
977 *** No matching source for the "$2" test, check that
978 *** both the test source and result macros refer to the same name.
981 # If result is not yet cached examine the build output
982 AS_IF(AS_VAR_TEST_SET(lb_test), [], [
983 # Fail if the compile was not done.
984 AS_IF([test -f ${O}.tested], [],
985 [AC_MSG_ERROR([*** Compile test for $2 was not run.])])
986 # Default is to expect only the <module>.o be generated.
988 # Require the <module>.ko file when "module" is passed
989 AS_IF([test "X'$5'" == "X'module'"], [NEED_KO=1])
990 # If test was compiled and if we got an object ...
991 AS_IF([test ${NEED_KO} -eq 0], [AS_IF([test ! -f ${O}.ko], [
992 AS_IF([test -f ${O}.o], [touch ${O}.ko])])])
994 # key is valid. Cache should be valid, set the variable
995 AC_CACHE_CHECK([$1], lb_test,
996 AS_IF([test -f ${O}.ko],
997 AS_VAR_SET([lb_test], [yes]),
998 AS_VAR_SET([lb_test], [no])))
999 # Read the variable and run the caller's actions for yes (arg2) or no (arg3)
1000 AS_VAR_IF([lb_test], [yes], $3, $4)
1001 AS_VAR_POPDEF([lb_test])
1002 ]) # LB3_LINUX_TEST_RESULT
1005 # LB2_LINUX_TEST_RESULT
1007 # $1 - *unique* name matching the LB2_LINUX_TEST_SRC macro
1008 # $2 - run on success (valid .ko generated)
1009 # $3 - run on failure (unable to compile)
1012 AC_DEFUN([LB2_LINUX_TEST_RESULT],[
1013 LB2_MSG_LINUX_TEST_RESULT([for $1], [$1], [$2], [$3], [$4])
1014 ]) # LB2_LINUX_TEST_RESULT
1017 # LB2_SRC_CHECK_CONFIG
1019 # generate source to check if a given config option is defined
1021 # $1 - CONFIG_<name>
1023 AC_DEFUN([LB2_SRC_CHECK_CONFIG], [
1024 LB2_LINUX_TEST_SRC([config_$1], [
1025 #include <$AUTOCONF_HDIR/autoconf.h>
1028 #error CONFIG_$1 not #defined
1031 ]) # LB2_SRC_CHECK_CONFIG
1034 # LB2_TEST_CHECK_CONFIG
1036 # test result compile test from LB2_SRC_CHECK_CONFIG
1038 # $1 - CONFIG_<name>
1042 AC_DEFUN([LB2_TEST_CHECK_CONFIG], [
1043 LB2_MSG_LINUX_TEST_RESULT([if Linux kernel was built with CONFIG_$1],
1049 ]) # LB2_TEST_CHECK_CONFIG
1052 # LB2_SRC_CHECK_CONFIG_IM
1054 # generate source to check if a given config option is defined as built-in
1057 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
1059 AC_DEFUN([LB2_SRC_CHECK_CONFIG_IM], [
1060 LB2_LINUX_TEST_SRC([config_im_$1], [
1061 #include <$AUTOCONF_HDIR/autoconf.h>
1063 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
1064 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
1067 ]) # LB2_SRC_CHECK_CONFIG_IM
1071 # LB2_TEST_CHECK_CONFIG_IM
1073 # test result compile test from LB2_SRC_CHECK_CONFIG_IM
1075 # $1 - CONFIG_<name>
1079 AC_DEFUN([LB2_TEST_CHECK_CONFIG_IM], [
1080 LB2_MSG_LINUX_TEST_RESULT([if Linux kernel enabled CONFIG_$1 as built-in or module],
1086 ]) # LB2_TEST_CHECK_CONFIG_IM
1089 # LB2_CHECK_LINUX_HEADER_SRC
1092 # $2 - Extra CFLAGS (ex: -Werror)
1094 AC_DEFUN([LB2_CHECK_LINUX_HEADER_SRC], [
1095 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
1096 UNIQUE_ID=$(echo $1 | tr /. __)
1097 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_${UNIQUE_ID}])
1098 # Skip test write and build steps if the result is already known.
1099 LB2_LINUX_CONFTEST_C([${UNIQUE_ID}], [LB_LANG_PROGRAM([@%:@include <$1>])])
1100 LB2_LINUX_CONFTEST_MAKEFILE([${UNIQUE_ID}], [$2])
1101 AS_VAR_POPDEF([lb_test])
1105 # LB2_CHECK_LINUX_HEADER_RESULT
1111 AC_DEFUN([LB2_CHECK_LINUX_HEADER_RESULT], [
1112 UNIQUE_ID=$(echo $1 | tr /. __)
1113 LB2_MSG_LINUX_TEST_RESULT([for linux header $1], [${UNIQUE_ID}],