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
115 OPENEULER_KERNEL="no"
116 # And if any of the above kernels has been detected yet
119 # Check for RedHat first (no need to check KERNEL_FOUND
120 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
121 lb_cv_rhel_kernel_version=""
122 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
123 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
124 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
125 '/ RHEL_MINOR / { print [$]3 }' \
126 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
129 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
132 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
136 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
137 LB_CHECK_CONFIG([SUSE_KERNEL], [
144 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
145 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
146 lb_cv_ubuntu_kernel_sig="no"
147 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
148 lb_cv_ubuntu_kernel_sig="yes"
151 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
157 # Check for a ELRepo -ml kernel on RHEL 7/8
158 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
159 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
160 lb_cv_mainline_kernel_sig, [
161 lb_cv_mainline_kernel_sig="no"
162 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
163 lb_cv_mainline_kernel_sig="yes"
165 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
166 lb_cv_mainline_kernel_sig="yes"
169 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
175 # Check for openEuler
176 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
177 AC_CACHE_CHECK([for openEuler kernel version number], lb_cv_openeuler_kernel_version, [
178 lb_cv_openeuler_kernel_version=""
179 AS_IF([fgrep -q OPENEULER_VERSION $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
180 lb_cv_openeuler_kernel_version=$(awk '/ OPENEULER_MAJOR / { print [$]3 }' \
181 $LINUX_OBJ/include/$VERSION_HDIR/version.h).$(awk \
182 '/ OPENEULER_MINOR / { print [$]3 }' \
183 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
186 AS_IF([test -n "$lb_cv_openeuler_kernel_version"], [
187 OPENEULER_KERNEL="yes"
189 OPENEULER_VERSION_NO=$lb_cv_openeuler_kernel_version
193 # If still no kernel was found, a warning is issued
194 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
195 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler nor Ubuntu])
198 AC_MSG_CHECKING([for Linux kernel module package directory])
199 AC_ARG_WITH([kmp-moddir],
200 AS_HELP_STRING([--with-kmp-moddir=string],
201 [set the kmod updates or extra directory]),
204 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
205 [test x$OPENEULER_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
206 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
207 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
208 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler nor Ubuntu])]
210 IN_KERNEL="${PACKAGE}"])
211 AC_MSG_RESULT($KMP_MODDIR)
213 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
215 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
216 AC_SUBST(modulefsdir)
218 modulenetdir="${moduledir}/net/${IN_KERNEL}"
219 AC_SUBST(modulenetdir)
225 # LB_LINUX_SYMVERFILE
227 # SLES 9 uses a different name for this file - unsure about vanilla kernels
228 # around this version, but it matters for servers only.
229 AC_DEFUN([LB_LINUX_SYMVERFILE], [
230 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
231 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
232 [lb_cv_module_symvers=Modules.symvers],
233 [lb_cv_module_symvers=Module.symvers])
235 SYMVERFILE=$lb_cv_module_symvers
240 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
242 AC_DEFUN([LB_ARG_REPLACE_PATH], [
244 eval set -- $ac_configure_args
248 arg=--with-[$1]=[$2] ;;
250 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
252 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
253 new_configure_args="$new_configure_args '$arg'"
255 ac_configure_args=$new_configure_args
259 # __LB_ARG_CANON_PATH
261 # this is the work-horse of the next function
263 AC_DEFUN([__LB_ARG_CANON_PATH], [
264 [$3]=$(readlink -f $with_$2)
265 LB_ARG_REPLACE_PATH([$1], $[$3])
271 # a front-end for the above function that transforms - and . in the
272 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
274 AC_DEFUN([LB_ARG_CANON_PATH], [
275 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
281 # Find paths for linux, handling kernel-source rpms
283 AC_DEFUN([LB_LINUX_PATH], [
284 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
285 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
287 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
288 PATHS="/lib/modules/$(uname -r)/build"
290 PATHS="/usr/src/linux-headers-$(uname -r)"
292 PATHS+=" $DEFAULT_LINUX"
293 for DEFAULT_LINUX_OBJ in $PATHS; do
294 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
297 AC_MSG_CHECKING([for Linux sources])
299 AS_HELP_STRING([--with-linux=path],
300 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
301 [LB_ARG_CANON_PATH([linux], [LINUX])
302 DEFAULT_LINUX_OBJ=$LINUX],
303 [LINUX=$DEFAULT_LINUX])
304 AC_MSG_RESULT([$LINUX])
306 # -------- check for linux --------
307 LB_CHECK_FILE([$LINUX], [],
308 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
310 # -------- linux objects (for 2.6) --
311 AC_MSG_CHECKING([for Linux objects])
312 AC_ARG_WITH([linux-obj],
313 AS_HELP_STRING([--with-linux-obj=path],
314 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
315 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
316 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
317 AC_MSG_RESULT([$LINUX_OBJ])
319 ## -------- with linux should point to <kernel>-common on Debian
320 AS_IF([test ${LINUX} == ${LINUX_OBJ} -a ${LINUX} == $(realpath ${LINUX})],[
321 this_arch=$(realpath ${LINUX} | sed 's/-/\n/g' | tail -1)
322 linux_headers_common=$(realpath ${LINUX}|sed "s/-${this_arch}\$/-common/g")
323 AS_IF([test "${this_arch}" != common],[
324 _cah="${linux_headers_common}/include/linux/compiler_attributes.h"
325 _cgh="${linux_headers_common}/include/linux/compiler-gcc.h"
326 AS_IF([test -f "${_cah}" -o -f "${_cgh}"],[
327 AC_MSG_WARN([Setting LINUX to ${linux_headers_common} was ${LINUX}])
328 LINUX=${linux_headers_common}])
333 # -------- check for .config --------
334 AC_ARG_WITH([linux-config],
335 [AS_HELP_STRING([--with-linux-config=path],
336 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
337 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
338 [LINUX_CONFIG=$LINUX_OBJ/.config])
340 # -------- check if .config exists --
341 LB_CHECK_FILE([$LINUX_CONFIG], [],
344 Kernel config could not be found.
347 AC_SUBST(LINUX_CONFIG)
349 LB_CHECK_FILE([/boot/kernel.h],
350 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
351 [LB_CHECK_FILE([/var/adm/running-kernel.h],
352 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
354 AC_ARG_WITH([kernel-source-header],
355 AS_HELP_STRING([--with-kernel-source-header=path],
356 [Use a different kernel version header.]),
357 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
359 # ----------- make dep run? ------------------
360 # at 2.6.19 # $LINUX/include/linux/config.h is removed
361 # and at more old has only one line include <autoconf.h>
363 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
364 [AUTOCONF_HDIR=generated],
365 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
366 [AUTOCONF_HDIR=linux],
367 [AC_MSG_ERROR([Run make config in $LINUX.])])])
368 AC_SUBST(AUTOCONF_HDIR)
370 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
371 [VERSION_HDIR=linux],
372 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
373 [VERSION_HDIR=generated/uapi/linux],
374 [AC_MSG_ERROR([Run make config in $LINUX.])])])
375 AC_SUBST(VERSION_HDIR)
377 # ----------- kconfig.h exists ---------------
378 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
379 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
381 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
382 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
383 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
384 AC_SUBST(CONFIG_INCLUDE)
386 # ------------ rhconfig.h includes runtime-generated bits --
387 # RedHat kernel-source checks
389 # we know this exists after the check above. if the user
390 # tarred up the tree and ran make dep etc. in it, then
391 # version.h gets overwritten with a standard linux one.
393 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
394 # This is a clean kernel-source tree, we need to
395 # enable extensive workarounds to get this to build modules
396 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
397 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
400 Using /boot/kernel.h from RUNNING kernel.
402 If this is not what you want, use --with-kernel-source-header.
403 Consult build/README.kernel-source for details.
408 $KERNEL_SOURCE_HEADER not found.
410 Consult build/README.kernel-source for details.
413 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
416 AS_IF([test -n SUBARCH],
417 [SUBARCH=$(echo $target_cpu | sed -e 's/powerpc.*/powerpc/' -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/' -e 's/aarch64.*/arm64/' -e 's/armv7.*/arm/')
420 # this is needed before we can build modules
423 # --- Parallel config for kernel v5.17+
424 AS_IF([test "x$lb_cv_dequote_CC_VERSION_TEXT" = "xyes"], [
425 CC_VERSION_TEXT=$(gcc --version | head -n1 | tr ' ()' '.')
426 MAKE_KMOD_ENV="CONFIG_CC_VERSION_TEXT='$CC_VERSION_TEXT'"])
428 # --- check that we can build modules at all
429 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
433 Kernel modules cannot be built. Consult config.log for details.
435 If you are trying to build with a kernel-source rpm,
436 consult build/README.kernel-source
441 ]) # end of LB_LINUX_PATH
446 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
447 # so we test if request_module is implemented or not
448 AC_DEFUN([LC_MODULE_LOADING], [
449 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
451 #include <linux/kmod.h>
453 int myretval=ENOSYS ;
456 $makerule LUSTRE_KERNEL_TEST=conftest.i
458 grep request_module build/conftest.i |dnl
459 grep -v `grep "int myretval=" build/conftest.i |dnl
460 cut -d= -f2 | cut -d" " -f1`dnl
462 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
464 AS_IF([test "$lb_cv_module_loading" = yes],
465 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
466 [kernel module loading is possible])],
469 Kernel module loading support is highly recommended.
475 AC_DEFUN([LB_PROG_LINUX_SRC], [
476 LB2_SRC_CHECK_CONFIG([MODULES])
477 LB2_SRC_CHECK_CONFIG([MODVERSIONS])
480 AC_DEFUN([LB_PROG_LINUX_RESULTS], [
481 LB2_TEST_CHECK_CONFIG([MODULES], [], [AC_MSG_ERROR(
482 [module support is required to build Lustre kernel modules.])
484 LB2_TEST_CHECK_CONFIG([MODVERSIONS],[],[])
492 AC_DEFUN([LB_PROG_LINUX], [
502 # Determine if the target is a dpkg system or rpm
504 AC_DEFUN([LB_USES_DPKG], [
505 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
507 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
509 uses_dpkg=$lb_cv_uses_dpkg
515 # check symbol exported or not
517 # $2 - file(s) for find.
521 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
523 AC_DEFUN([LB_CHECK_EXPORT], [
524 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
525 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
526 AS_VAR_SET([lb_export], [no])
527 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
528 [AS_VAR_SET([lb_export], [yes])],
530 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
531 AS_VAR_SET([lb_export], [yes])
536 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
537 AS_VAR_POPDEF([lb_export])dnl
543 # check if a given config option is defined
548 AC_DEFUN([LB_CHECK_CONFIG], [
549 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
551 #include <$AUTOCONF_HDIR/autoconf.h>
554 #error CONFIG_$1 not #defined
562 # check if a given config option is builtin or as module
563 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
567 AC_DEFUN([LB_CHECK_CONFIG_IM], [
568 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
570 #include <$AUTOCONF_HDIR/autoconf.h>
572 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
573 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
576 ]) # LB_CHECK_CONFIG_IM
579 # these are like AC_TRY_COMPILE, but try to build modules against the
580 # kernel, inside the build directory
584 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
585 # --------------------------------------
587 m4_define([LB_LANG_PROGRAM],
589 #include <linux/kernel.h>
590 #include <linux/module.h>
592 #if defined(NEED_LOCKDEP_IS_HELD_DISCARD_CONST) \
593 && defined(CONFIG_LOCKDEP) \
594 && defined(lockdep_is_held)
595 #undef lockdep_is_held
596 #define lockdep_is_held(lock) \
597 lock_is_held((struct lockdep_map *)&(lock)->dep_map)
604 dnl Do *not* indent the following line: there may be CPP directives.
605 dnl Don't move the `;' right after for the same reason.
610 MODULE_LICENSE("GPL");])
613 # LB_LINUX_COMPILE_IFELSE
615 # like AC_COMPILE_IFELSE
617 # $1 - AC_LANG_SOURCE()
623 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
624 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
625 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
626 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])],
628 [_AC_MSG_LOG_CONFTEST
629 m4_ifvaln([$5],[$5])dnl])
630 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
634 # LB_LINUX_TRY_COMPILE
636 # like AC_TRY_COMPILE
638 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
639 LB_LINUX_COMPILE_IFELSE(
640 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
641 [modules], [test -s build/conftest.o],
648 # like LB_LINUX_TRY_COMPILE, but with different arguments
650 AC_DEFUN([LB_LINUX_TRY_MAKE], [
651 LB_LINUX_COMPILE_IFELSE(
652 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
653 [$3], [$4], [$5], [$6])
658 # $1 - checking message
665 AC_DEFUN([LB_CHECK_COMPILE], [
666 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
667 AC_CACHE_CHECK([$1], lb_compile, [
668 LB_LINUX_TRY_COMPILE([$3], [$4],
669 [AS_VAR_SET([lb_compile], [yes])],
670 [AS_VAR_SET([lb_compile], [no])])
672 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
673 AS_VAR_POPDEF([lb_compile])dnl
674 ]) # LB_CHECK_COMPILE
677 # LB_CHECK_LINUX_HEADER
679 # Like AC_CHECK_HEADER but checks for a kernel-space header
681 AC_DEFUN([LB_CHECK_LINUX_HEADER], [
682 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])
683 AC_CACHE_CHECK([for $1], lb_header, [
684 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
685 [modules], [test -s build/conftest.o],
686 [AS_VAR_SET([lb_header], [yes])],
687 [AS_VAR_SET([lb_header], [no])])
689 AS_VAR_IF([lb_header], [yes], [$2], [$3])
690 AS_VAR_POPDEF([lb_header])
691 ]) # LB_CHECK_LINUX_HEADER
693 # ------------------------------------------------------------------------------
694 # Support 2 stage: parallel compile then checked test results
695 # Heavily inspired by OpenZFS
697 # When converting tests from an LB_CHECK_COMPILE to use an
698 # LB2_LINUX_TEST_SRC and LB2_LINUX_TEST_RESULT pairing the primary
699 # consideration if dependencies on the results of LB2_LINUX_TEST_RESULT
700 # or LB2_TEST_CHECK_CONFIG[_IM] are used by annother compile test.
701 # Such dependencies should be avoided without a clear understanding
702 # of when the test result is actually available.
703 # The serial LB_CHECK_* test produces immediate results
704 # where as the LB2_ variant is not available until an intermediate
705 # LB2_LINUX_TEST_COMPILE_ALL has been executed.
707 # Currently all of the non-conditional LB_CHECK_COMPILE and
708 # LB_CHECK_CONFIG[_IM] cases are executed before any of the
709 # LB2_LINUX_TEST_SRC, or LB2_SRC_CHECK_CONFIG[_IM] code snippets
710 # are written. [Reference LB_CONFIG_MODULES for more details]
712 # This allows such LB2_*_SRC_* test cases to rely on
713 # prior LB_CHECK_* results, provided such results are preserved
714 # in the global configure name space. Likewise an LB2_LINUX_TEST_RESULT
715 # or LB2_TEST_CHECK_CONFIG[_IM] may conditionally execute a further
716 # LB_CHECK_* if required. Although it would be typcially be faster
717 # to run a few compile tests and conditionally ignore the results
718 # the reduced configure time may not always out weight the added
721 # It is worth noting that the LB_CHECK_COMPILE macros second argument
722 # is used as the configure test cache name. While is has been important
723 # that this name be globally unique it is even more important in the
724 # parallel case. The is somewhat alleviated by the sanity check in the
725 # LB2_LINUX_TEST_RESULT macro as it will abort with an error if
726 # the cache name does not exist. However care should be taken
727 # that the cache name is a globally unique identifier.
729 # Non-unique cases that are otherwise correct can be identified in the
730 # configure output when a results include ".. (cached)". This indicates
731 # either a duplicate LB_CHECK_* execution which is not critical or a
732 # duplicate identifier which needs to be corrected.
734 # At this point the number of LB_ and LB2_ examples should be
735 # sufficient for the casual developer to perform cut-paste-modify
736 # without serious confusion or complication.
737 # ------------------------------------------------------------------------------
739 AC_DEFUN([LB2_LINUX_CONFTEST_C], [
740 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
741 test -d ${TEST_DIR}/$2 || mkdir -p ${TEST_DIR}/$2
742 cat confdefs.h - <<_EOF >${TEST_DIR}/$2/$2.c
748 # LB2_LINUX_CONFTEST_MAKEFILE
750 # $1 - *unique* test case name
751 # $2 - additional build flags (ccflags)
752 # $3 - external kernel includes for lnet o2ib|gni
753 # $4 - extra symbol in Psuedo.symvers (optional)
755 AC_DEFUN([LB2_LINUX_CONFTEST_MAKEFILE], [
756 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
757 test -d ${TEST_DIR} || mkdir -p ${TEST_DIR}
758 test -d ${TEST_DIR}/$1 || mkdir -p ${TEST_DIR}/$1
760 file=${TEST_DIR}/$1/Makefile
764 if test "${EXT_SYMBOL}x" != "x" ; then
765 PSYM_FILE=${TEST_DIR}/$1/Psuedo.symvers
766 echo -e "0x12345678\t${EXT_SYMBOL}\tvmlinux\tEXPORT_SYMBOL\t" > ${PSYM_FILE}
769 if test "x$O2IBPATH" != "x"; then
770 if test "x$O2IBPATH" != "x$LINUX_OBJ"; then
771 XTRA_SYM="$O2IBPATH/Module.symvers"
776 # Example command line to manually build source
777 # make modules -C $LINUX_OBJ $ARCH_UM M=${TEST_DIR}/$1 $MAKE_KMOD_ENV
787 LINUXINCLUDE = $EXT_INCLUDE
788 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include
789 LINUXINCLUDE += -Iinclude -Iarch/$SUBARCH/include/generated
790 LINUXINCLUDE += -I$LINUX/include
791 LINUXINCLUDE += -Iinclude2
792 LINUXINCLUDE += -I$LINUX/include/uapi
793 LINUXINCLUDE += -Iinclude/generated
794 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include/uapi
795 LINUXINCLUDE += -Iarch/$SUBARCH/include/generated/uapi
796 LINUXINCLUDE += -I$LINUX/include/uapi -Iinclude/generated/uapi
798 LINUXINCLUDE += -include \$(SOBJ)/spl_config.h
801 LINUXINCLUDE += -include \$(ZOBJ)/zfs_config.h
804 LINUXINCLUDE += -I\$(SINC)/include
807 LINUXINCLUDE += -I\$(ZINC) -I\$(ZINC)/include
809 LINUXINCLUDE += -I\$(SINC)
811 LINUXINCLUDE += -I\$(ZINC)/include/spl
814 LINUXINCLUDE += -include $CONFIG_INCLUDE
815 KBUILD_EXTRA_SYMBOLS += ${ZFS_OBJ:+$ZFS_OBJ/Module.symvers}
816 KBUILD_EXTRA_SYMBOLS += ${XTRA_SYM}
818 KBUILD_EXTRA_SYMBOLS += \$(PSYM)
821 ccflags-y := -Werror-implicit-function-declaration
824 # Additional custom CFLAGS as requested.
825 m4_ifval($2, [echo "ccflags-y += $2" >>$file], [])
828 echo "obj-m := $1.o" >>$file
829 echo "obj-m += $1/" >>${TEST_DIR}/Makefile
833 # LB2_LINUX_TEST_COMPILE
835 # Perform a full compile excluding the final modpost phase.
839 AC_DEFUN([LB2_LINUX_TEST_COMPILE], [
842 J=${TEST_JOBS:-$(nproc)}
844 AC_MSG_NOTICE([Making $1 in $D])
845 AC_MSG_NOTICE([KBUILD_MODPOST_NOFINAL="yes" make modules -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV])
847 AC_TRY_COMMAND([KBUILD_MODPOST_NOFINAL="yes"
848 make modules -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV >${L} 2>&1])
849 AS_IF([test -f ${L}],
850 [AS_IF([test -f $2/Makefile],
851 [mv $2/Makefile $2/Makefile.compile.$1])],
852 [AC_MSG_ERROR([*** Unable to compile test source ... $3])
857 # Perform the compilation of the test cases in two phases.
859 # Phase 1) attempt to build the object files for all of the tests
860 # defined by the LB2_LINUX_TEST_SRC macro.
862 # Phase 2) disable all tests which failed the initial compilation.
864 # This allows us efficiently build the test cases in parallel while
865 # remaining resilient to build failures which are expected when
866 # detecting the available kernel interfaces.
868 # The maximum allowed parallelism can be controlled by setting the
869 # TEST_JOBS environment variable which defaults to $(nproc).
871 AC_DEFUN([LB2_LINUX_TEST_COMPILE_ALL], [
872 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
873 # Phase 1 - Compilation only, final linking is skipped.
874 LB2_LINUX_TEST_COMPILE([$1], [${TEST_DIR}], [$2])
875 for dir in $(awk '/^obj-m/ { print [$]3 }' \
876 ${TEST_DIR}/Makefile.compile.$1); do
878 touch ${TEST_DIR}/$name/$name.tested
889 # $5 - external include paths
890 # $6 - fake symvers entry
892 # NOTICE as all of the test cases are compiled in parallel tests may not
893 # depend on the results other tests.
894 # Each test needs resolve any external dependencies at the time the program
895 # source is generated.
897 AC_DEFUN([LB2_LINUX_TEST_SRC], [
898 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
899 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$1])
900 # Skip test write and build steps if the result is already known.
901 LB2_LINUX_CONFTEST_C([LB_LANG_PROGRAM([[$2]], [[$3]])], [$1_pc])
902 LB2_LINUX_CONFTEST_MAKEFILE([$1_pc], [$4], [$5], [$6])
903 AS_VAR_POPDEF([lb_test])
907 # LB2_LINUX_TEST_RESULT
909 # $1 - *unique* name matching the LB2_LINUX_TEST_SRC macro
910 # $2 - run on success (valid .ko generated)
911 # $3 - run on failure (unable to compile)
913 AC_DEFUN([LB2_LINUX_TEST_RESULT],[
914 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
915 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$1])
916 D="$(realpath ${TEST_DIR})"
919 AS_IF([test -d ${T}], [
920 # test source exists, was the compile test run?
921 AS_IF([test -f ${O}.tested],[
922 # compile test was run.
924 # compile test was NOT run. Re-compile everything.
925 AC_MSG_NOTICE([** Rebuilding all tests **])
927 J=${TEST_JOBS:-$(nproc)}
928 for mf in $(ls -1 ${TEST_DIR}/Makefile.compile.*); do
929 ln -sf $mf ${D}/Makefile
930 KBUILD_MODPOST_NOFINAL="yes"
931 make modules -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} >> rebuild.log 2>&1
933 for dir in $(awk '/^obj-m/ { print [$]3 }' ${D}/$mf); do
935 AC_MSG_NOTICE([touch ${D}/$name/$name.tested])
936 touch ${D}/$name/$name.tested
940 # compile test was NOT run. Re-compile everything.
943 # test source does not exist:
945 *** No matching source for the "$1" test, check that
946 *** both the test source and result macros refer to the same name.
949 # Abort if key does not exist
950 AS_IF([test -f ${O}.tested], [],
951 [AC_MSG_ERROR([*** Compile test for $1 was not run.])])
952 # If test was compiled and if we got an object ...
953 AS_IF([test -f ${O}.o], [touch ${O}.ko])
954 # key is valid. Cache should be valid, set the variable
955 AC_CACHE_CHECK([for $1], lb_test,
956 AS_IF([test -f ${O}.ko],
957 AS_VAR_SET([lb_test], [yes]),
958 AS_VAR_SET([lb_test], [no])))
959 # Read the variable and run the caller's actions for yes (arg2) or no (arg3)
960 AS_VAR_IF([lb_test], [yes], $2, $3)
961 AS_VAR_POPDEF([lb_test])
962 ]) # LB2_LINUX_TEST_RESULT
965 # LB2_SRC_CHECK_CONFIG
967 # generate source to check if a given config option is defined
971 AC_DEFUN([LB2_SRC_CHECK_CONFIG], [
972 LB2_LINUX_TEST_SRC([config_$1], [
973 #include <$AUTOCONF_HDIR/autoconf.h>
976 #error CONFIG_$1 not #defined
979 ]) # LB2_SRC_CHECK_CONFIG
982 # LB2_TEST_CHECK_CONFIG
984 # test result compile test from LB2_SRC_CHECK_CONFIG
990 AC_DEFUN([LB2_TEST_CHECK_CONFIG], [
991 AC_MSG_CHECKING([if Linux kernel was built with CONFIG_$1])
992 LB2_LINUX_TEST_RESULT([config_$1], [
997 ]) # LB2_TEST_CHECK_CONFIG
1000 # LB2_SRC_CHECK_CONFIG_IM
1002 # generate source to check if a given config option is defined as built-in
1005 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
1007 AC_DEFUN([LB2_SRC_CHECK_CONFIG_IM], [
1008 LB2_LINUX_TEST_SRC([config_im_$1], [
1009 #include <$AUTOCONF_HDIR/autoconf.h>
1011 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
1012 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
1015 ]) # LB2_SRC_CHECK_CONFIG_IM
1019 # LB2_TEST_CHECK_CONFIG_IM
1021 # test result compile test from LB2_SRC_CHECK_CONFIG_IM
1023 # $1 - CONFIG_<name>
1027 AC_DEFUN([LB2_TEST_CHECK_CONFIG_IM], [
1028 AC_MSG_CHECKING([if Linux kernel enabled CONFIG_$1 as built-in or module])
1029 LB2_LINUX_TEST_RESULT([config_im_$1], [
1034 ]) # LB2_TEST_CHECK_CONFIG_IM