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 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
30 [test -s build/conftest.i],
31 [lb_cv_module_target="M"], [
32 AC_MSG_ERROR([kernel module make failed; check config.log for details])
35 AS_IF([test -z "$lb_cv_module_target"],
36 [AC_MSG_ERROR([unknown external module build target])],
37 [test "x$lb_cv_module_target" = "xM54"],
38 [makerule="$PWD/build"
39 lb_cv_module_target="M"],
40 [test "x$lb_cv_module_target" = "xM"],
41 [makerule="_module_$PWD/build"])
42 MODULE_TARGET=$lb_cv_module_target
43 AC_SUBST(MODULE_TARGET)
49 # Determine the Linux kernel version string from the utsrelease
51 AC_DEFUN([LB_LINUX_UTSRELEASE], [
52 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
54 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
55 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
56 utsrelease3=$LINUX_OBJ/include/linux/version.h
57 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
58 [utsrelease=$utsrelease1],
59 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
60 [utsrelease=$utsrelease2],
61 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
62 [utsrelease=$utsrelease3])
63 AS_IF([test -n "$utsrelease"],
64 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
67 Cannot find UTS_RELEASE definition.
69 This is often provided by the kernel-devel package.
73 AS_IF([test -z "$lb_cv_utsrelease"],
74 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
75 LINUXRELEASE=$lb_cv_utsrelease
76 AC_SUBST(LINUXRELEASE)
82 # get the release version of linux
84 AC_DEFUN([LB_LINUX_RELEASE], [
87 # Define default states
92 # And if any of the above kernels has been detected yet
95 # Check for RedHat first (no need to check KERNEL_FOUND
96 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
97 lb_cv_rhel_kernel_version=""
98 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
99 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
100 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
101 '/ RHEL_MINOR / { print [$]3 }' \
102 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
105 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
108 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
112 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
113 LB_CHECK_CONFIG([SUSE_KERNEL], [
120 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
121 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
122 lb_cv_ubuntu_kernel_sig="no"
123 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
124 lb_cv_ubuntu_kernel_sig="yes"
127 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
134 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
135 AC_CACHE_CHECK([for Debian kernel signature], lb_cv_debian_kernel_sig, [
136 lb_cv_debian_kernel_sig="no"
137 AS_IF([grep -q "LINUX_PACKAGE_ID\s*\"\s*Debian" $LINUX_OBJ/include/generated/package.h], [
138 lb_cv_debian_kernel_sig="yes"
141 AS_IF([test "x$lb_cv_debian_kernel_sig" = "xyes"], [
147 # Check for a ELRepo -ml kernel on RHEL 7/8
148 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
149 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
150 lb_cv_mainline_kernel_sig, [
151 lb_cv_mainline_kernel_sig="no"
152 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
153 lb_cv_mainline_kernel_sig="yes"
155 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
156 lb_cv_mainline_kernel_sig="yes"
159 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
160 MAINLINE_KERNEL="yes"
165 # If still no kernel was found, a warning is issued
166 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
167 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, Ubuntu nor Debian])
170 AC_MSG_CHECKING([for Linux kernel module package directory])
171 AC_ARG_WITH([kmp-moddir],
172 AC_HELP_STRING([--with-kmp-moddir=string],
173 [set the kmod updates or extra directory]),
176 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
177 [test x$MAINLINE_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
178 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
179 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
180 [test x$DEBIAN_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
181 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, Ubuntu nor Debian])]
183 IN_KERNEL="${PACKAGE}"])
184 AC_MSG_RESULT($KMP_MODDIR)
186 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
188 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
189 AC_SUBST(modulefsdir)
191 modulenetdir="${moduledir}/net/${IN_KERNEL}"
192 AC_SUBST(modulenetdir)
198 # LB_LINUX_SYMVERFILE
200 # SLES 9 uses a different name for this file - unsure about vanilla kernels
201 # around this version, but it matters for servers only.
202 AC_DEFUN([LB_LINUX_SYMVERFILE], [
203 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
204 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
205 [lb_cv_module_symvers=Modules.symvers],
206 [lb_cv_module_symvers=Module.symvers])
208 SYMVERFILE=$lb_cv_module_symvers
213 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
215 AC_DEFUN([LB_ARG_REPLACE_PATH], [
217 eval set -- $ac_configure_args
221 arg=--with-[$1]=[$2] ;;
223 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
225 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
226 new_configure_args="$new_configure_args '$arg'"
228 ac_configure_args=$new_configure_args
232 # __LB_ARG_CANON_PATH
234 # this is the work-horse of the next function
236 AC_DEFUN([__LB_ARG_CANON_PATH], [
237 [$3]=$(readlink -f $with_$2)
238 LB_ARG_REPLACE_PATH([$1], $[$3])
244 # a front-end for the above function that transforms - and . in the
245 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
247 AC_DEFUN([LB_ARG_CANON_PATH], [
248 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
254 # Find paths for linux, handling kernel-source rpms
256 AC_DEFUN([LB_LINUX_PATH], [
257 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
258 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
260 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
261 PATHS="/lib/modules/$(uname -r)/build"
263 PATHS="/usr/src/linux-headers-$(uname -r)"
265 PATHS+=" $DEFAULT_LINUX"
266 for DEFAULT_LINUX_OBJ in $PATHS; do
267 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
270 AC_MSG_CHECKING([for Linux sources])
272 AC_HELP_STRING([--with-linux=path],
273 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
274 [LB_ARG_CANON_PATH([linux], [LINUX])
275 DEFAULT_LINUX_OBJ=$LINUX],
276 [LINUX=$DEFAULT_LINUX])
277 AC_MSG_RESULT([$LINUX])
280 # -------- check for linux --------
281 LB_CHECK_FILE([$LINUX], [],
282 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
284 # -------- linux objects (for 2.6) --
285 AC_MSG_CHECKING([for Linux objects])
286 AC_ARG_WITH([linux-obj],
287 AC_HELP_STRING([--with-linux-obj=path],
288 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
289 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
290 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
291 AC_MSG_RESULT([$LINUX_OBJ])
294 # -------- check for .config --------
295 AC_ARG_WITH([linux-config],
296 [AC_HELP_STRING([--with-linux-config=path],
297 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
298 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
299 [LINUX_CONFIG=$LINUX_OBJ/.config])
301 # -------- check if .config exists --
302 LB_CHECK_FILE([$LINUX_CONFIG], [],
305 Kernel config could not be found.
308 AC_SUBST(LINUX_CONFIG)
310 LB_CHECK_FILE([/boot/kernel.h],
311 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
312 [LB_CHECK_FILE([/var/adm/running-kernel.h],
313 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
315 AC_ARG_WITH([kernel-source-header],
316 AC_HELP_STRING([--with-kernel-source-header=path],
317 [Use a different kernel version header.]),
318 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
320 # ----------- make dep run? ------------------
321 # at 2.6.19 # $LINUX/include/linux/config.h is removed
322 # and at more old has only one line include <autoconf.h>
324 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
325 [AUTOCONF_HDIR=generated],
326 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
327 [AUTOCONF_HDIR=linux],
328 [AC_MSG_ERROR([Run make config in $LINUX.])])])
329 AC_SUBST(AUTOCONF_HDIR)
331 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
332 [VERSION_HDIR=linux],
333 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
334 [VERSION_HDIR=generated/uapi/linux],
335 [AC_MSG_ERROR([Run make config in $LINUX.])])])
336 AC_SUBST(VERSION_HDIR)
338 # ----------- kconfig.h exists ---------------
339 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
340 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
342 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
343 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
344 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
345 AC_SUBST(CONFIG_INCLUDE)
347 # ------------ rhconfig.h includes runtime-generated bits --
348 # RedHat kernel-source checks
350 # we know this exists after the check above. if the user
351 # tarred up the tree and ran make dep etc. in it, then
352 # version.h gets overwritten with a standard linux one.
354 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
355 # This is a clean kernel-source tree, we need to
356 # enable extensive workarounds to get this to build modules
357 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
358 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
361 Using /boot/kernel.h from RUNNING kernel.
363 If this is not what you want, use --with-kernel-source-header.
364 Consult build/README.kernel-source for details.
369 $KERNEL_SOURCE_HEADER not found.
371 Consult build/README.kernel-source for details.
374 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
377 # this is needed before we can build modules
380 # --- check that we can build modules at all
381 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
385 Kernel modules cannot be built. Consult config.log for details.
387 If you are trying to build with a kernel-source rpm,
388 consult build/README.kernel-source
393 ]) # end of LB_LINUX_PATH
398 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
399 # so we test if request_module is implemented or not
400 AC_DEFUN([LC_MODULE_LOADING], [
401 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
403 #include <linux/kmod.h>
405 int myretval=ENOSYS ;
408 $makerule LUSTRE_KERNEL_TEST=conftest.i
410 grep request_module build/conftest.i |dnl
411 grep -v `grep "int myretval=" build/conftest.i |dnl
412 cut -d= -f2 | cut -d" " -f1`dnl
414 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
416 AS_IF([test "$lb_cv_module_loading" = yes],
417 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
418 [kernel module loading is possible])],
421 Kernel module loading support is highly recommended.
432 AC_DEFUN([LB_PROG_LINUX], [
436 LB_CHECK_CONFIG([MODULES], [], [
439 module support is required to build Lustre kernel modules.
443 LB_CHECK_CONFIG([MODVERSIONS])
445 LB_CHECK_CONFIG([KALLSYMS], [], [
448 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
459 # Determine if the target is a dpkg system or rpm
461 AC_DEFUN([LB_USES_DPKG], [
462 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
464 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
466 uses_dpkg=$lb_cv_uses_dpkg
472 # check symbol exported or not
474 # $2 - file(s) for find.
478 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
480 AC_DEFUN([LB_CHECK_EXPORT], [
481 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
482 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
483 AS_VAR_SET([lb_export], [no])
484 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
485 [AS_VAR_SET([lb_export], [yes])],
487 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
488 AS_VAR_SET([lb_export], [yes])
493 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
494 AS_VAR_POPDEF([lb_export])dnl
500 # check if a given config option is defined
505 AC_DEFUN([LB_CHECK_CONFIG], [
506 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
508 #include <$AUTOCONF_HDIR/autoconf.h>
511 #error CONFIG_$1 not #defined
519 # check if a given config option is builtin or as module
520 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
524 AC_DEFUN([LB_CHECK_CONFIG_IM], [
525 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
527 #include <$AUTOCONF_HDIR/autoconf.h>
529 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
530 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
533 ]) # LB_CHECK_CONFIG_IM
536 # these are like AC_TRY_COMPILE, but try to build modules against the
537 # kernel, inside the build directory
541 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
542 # --------------------------------------
544 m4_define([LB_LANG_PROGRAM],
546 #include <linux/kernel.h>
547 #include <linux/module.h>
552 dnl Do *not* indent the following line: there may be CPP directives.
553 dnl Don't move the `;' right after for the same reason.
558 MODULE_LICENSE("GPL");])
561 # LB_LINUX_COMPILE_IFELSE
563 # like AC_COMPILE_IFELSE
565 # $1 - AC_LANG_SOURCE()
571 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
572 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
573 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
574 SUBARCH=$(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/')
575 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$ZFS/include -I${SPL:-$ZFS/include/spl}} -include $CONFIG_INCLUDE" KBUILD_EXTRA_SYMBOLS=${ZFS_OBJ:+$ZFS_OBJ/Module.symvers} -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])],
577 [_AC_MSG_LOG_CONFTEST
578 m4_ifvaln([$5],[$5])dnl])
579 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
583 # LB_LINUX_TRY_COMPILE
585 # like AC_TRY_COMPILE
587 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
588 LB_LINUX_COMPILE_IFELSE(
589 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
590 [modules], [test -s build/conftest.o],
597 # like LB_LINUX_TRY_COMPILE, but with different arguments
599 AC_DEFUN([LB_LINUX_TRY_MAKE], [
600 LB_LINUX_COMPILE_IFELSE(
601 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
602 [$3], [$4], [$5], [$6])
607 # $1 - checking message
614 AC_DEFUN([LB_CHECK_COMPILE], [
615 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
616 AC_CACHE_CHECK([$1], lb_compile, [
617 LB_LINUX_TRY_COMPILE([$3], [$4],
618 [AS_VAR_SET([lb_compile], [yes])],
619 [AS_VAR_SET([lb_compile], [no])])
621 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
622 AS_VAR_POPDEF([lb_compile])dnl
623 ]) # LB_CHECK_COMPILE
626 # LB_CHECK_LINUX_HEADER
628 # Like AC_CHECK_HEADER but checks for a kernel-space header
630 m4_define([LB_CHECK_LINUX_HEADER], [
631 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
632 AC_CACHE_CHECK([for $1], lb_header, [
633 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
634 [modules], [test -s build/conftest.o],
635 [AS_VAR_SET([lb_header], [yes])],
636 [AS_VAR_SET([lb_header], [no])])
638 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
639 AS_VAR_POPDEF([lb_header])dnl
640 ]) # LB_CHECK_LINUX_HEADER