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, [
12 lb_cv_module_target=""
13 MODULE_TARGET="SUBDIRS"
14 rm -f build/conftest.i
15 LB_LINUX_TRY_MAKE([], [],
16 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
17 [test -s build/conftest.i],
18 [lb_cv_module_target="SUBDIRS"], [
20 makerule="_module_$PWD/build"
21 LB_LINUX_TRY_MAKE([], [],
22 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
23 [test -s build/conftest.i],
24 [lb_cv_module_target="M"], [
25 AC_MSG_ERROR([unknown; check config.log for details])
29 AS_IF([test -z "$lb_cv_module_target"],
30 [AC_MSG_ERROR([unknown external module build target])],
31 [test "x$lb_cv_module_target" = "xM"],
32 [makerule="_module_$PWD/build"])
33 MODULE_TARGET=$lb_cv_module_target
34 AC_SUBST(MODULE_TARGET)
40 # Determine the Linux kernel version string from the utsrelease
42 AC_DEFUN([LB_LINUX_UTSRELEASE], [
43 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
45 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
46 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
47 utsrelease3=$LINUX_OBJ/include/linux/version.h
48 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
49 [utsrelease=$utsrelease1],
50 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
51 [utsrelease=$utsrelease2],
52 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
53 [utsrelease=$utsrelease3])
54 AS_IF([test -n "$utsrelease"],
55 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
58 Cannot find UTS_RELEASE definition.
60 This is often provided by the kernel-devel package.
64 AS_IF([test -z "$lb_cv_utsrelease"],
65 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
66 LINUXRELEASE=$lb_cv_utsrelease
67 AC_SUBST(LINUXRELEASE)
73 # get the release version of linux
75 AC_DEFUN([LB_LINUX_RELEASE], [
78 # check if the kernel is one from RHEL or SUSE
79 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
80 lb_cv_rhel_kernel_version=""
81 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
82 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
83 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
84 '/ RHEL_MINOR / { print [$]3 }' \
85 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
88 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
90 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
93 LB_CHECK_CONFIG([SUSE_KERNEL], [SUSE_KERNEL="yes"], [SUSE_KERNEL="no"])
96 AC_MSG_CHECKING([for Linux kernel module package directory])
97 AC_ARG_WITH([kmp-moddir],
98 AC_HELP_STRING([--with-kmp-moddir=string],
99 [set the kmod updates or extra directory]),
102 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
103 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"])
104 IN_KERNEL="${PACKAGE}"])
105 AC_MSG_RESULT($KMP_MODDIR)
107 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
109 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
110 AC_SUBST(modulefsdir)
112 modulenetdir="${moduledir}/net/${IN_KERNEL}"
113 AC_SUBST(modulenetdir)
117 # LB_LINUX_SYMVERFILE
119 # SLES 9 uses a different name for this file - unsure about vanilla kernels
120 # around this version, but it matters for servers only.
121 AC_DEFUN([LB_LINUX_SYMVERFILE], [
122 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
123 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
124 [lb_cv_module_symvers=Modules.symvers],
125 [lb_cv_module_symvers=Module.symvers])
127 SYMVERFILE=$lb_cv_module_symvers
132 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
134 AC_DEFUN([LB_ARG_REPLACE_PATH], [
136 eval set -- $ac_configure_args
140 arg=--with-[$1]=[$2] ;;
142 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
144 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
145 new_configure_args="$new_configure_args '$arg'"
147 ac_configure_args=$new_configure_args
151 # __LB_ARG_CANON_PATH
153 # this is the work-horse of the next function
155 AC_DEFUN([__LB_ARG_CANON_PATH], [
156 [$3]=$(readlink -f $with_$2)
157 LB_ARG_REPLACE_PATH([$1], $[$3])
163 # a front-end for the above function that transforms - and . in the
164 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
166 AC_DEFUN([LB_ARG_CANON_PATH], [
167 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
173 # Find paths for linux, handling kernel-source rpms
175 AC_DEFUN([LB_LINUX_PATH], [
176 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
177 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
179 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
180 PATHS="/lib/modules/$(uname -r)/build"
182 PATHS+=" $DEFAULT_LINUX"
183 for DEFAULT_LINUX_OBJ in $PATHS; do
184 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
187 AC_MSG_CHECKING([for Linux sources])
189 AC_HELP_STRING([--with-linux=path],
190 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
191 [LB_ARG_CANON_PATH([linux], [LINUX])
192 DEFAULT_LINUX_OBJ=$LINUX],
193 [LINUX=$DEFAULT_LINUX])
194 AC_MSG_RESULT([$LINUX])
197 # -------- check for linux --------
198 LB_CHECK_FILE([$LINUX], [],
199 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
201 # -------- linux objects (for 2.6) --
202 AC_MSG_CHECKING([for Linux objects])
203 AC_ARG_WITH([linux-obj],
204 AC_HELP_STRING([--with-linux-obj=path],
205 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
206 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
207 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
208 AC_MSG_RESULT([$LINUX_OBJ])
211 # -------- check for .config --------
212 AC_ARG_WITH([linux-config],
213 [AC_HELP_STRING([--with-linux-config=path],
214 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
215 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
216 [LINUX_CONFIG=$LINUX_OBJ/.config])
218 # -------- check if .config exists --
219 LB_CHECK_FILE([$LINUX_CONFIG], [],
222 Kernel config could not be found.
224 If you are building from a kernel-source rpm consult build/README.kernel-source
227 AC_SUBST(LINUX_CONFIG)
229 LB_CHECK_FILE([/boot/kernel.h],
230 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
231 [LB_CHECK_FILE([/var/adm/running-kernel.h],
232 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
234 AC_ARG_WITH([kernel-source-header],
235 AC_HELP_STRING([--with-kernel-source-header=path],
236 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
237 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
239 # ----------- make dep run? ------------------
240 # at 2.6.19 # $LINUX/include/linux/config.h is removed
241 # and at more old has only one line include <autoconf.h>
243 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
244 [AUTOCONF_HDIR=generated],
245 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
246 [AUTOCONF_HDIR=linux],
247 [AC_MSG_ERROR([Run make config in $LINUX.])])])
248 AC_SUBST(AUTOCONF_HDIR)
250 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
251 [VERSION_HDIR=linux],
252 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
253 [VERSION_HDIR=generated/uapi/linux],
254 [AC_MSG_ERROR([Run make config in $LINUX.])])])
255 AC_SUBST(VERSION_HDIR)
257 # ----------- kconfig.h exists ---------------
258 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
259 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
261 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
262 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
263 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
264 AC_SUBST(CONFIG_INCLUDE)
266 # ------------ rhconfig.h includes runtime-generated bits --
267 # RedHat kernel-source checks
269 # we know this exists after the check above. if the user
270 # tarred up the tree and ran make dep etc. in it, then
271 # version.h gets overwritten with a standard linux one.
273 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
274 # This is a clean kernel-source tree, we need to
275 # enable extensive workarounds to get this to build modules
276 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
277 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
280 Using /boot/kernel.h from RUNNING kernel.
282 If this is not what you want, use --with-kernel-source-header.
283 Consult build/README.kernel-source for details.
288 $KERNEL_SOURCE_HEADER not found.
290 Consult build/README.kernel-source for details.
293 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
296 # this is needed before we can build modules
299 # --- check that we can build modules at all
300 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
304 Kernel modules cannot be built. Consult config.log for details.
306 If you are trying to build with a kernel-source rpm,
307 consult build/README.kernel-source
312 ]) # end of LB_LINUX_PATH
317 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
318 # so we test if request_module is implemented or not
319 AC_DEFUN([LC_MODULE_LOADING], [
320 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
322 #include <linux/kmod.h>
324 int myretval=ENOSYS ;
327 $makerule LUSTRE_KERNEL_TEST=conftest.i
329 grep request_module build/conftest.i |dnl
330 grep -v `grep "int myretval=" build/conftest.i |dnl
331 cut -d= -f2 | cut -d" " -f1`dnl
333 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
335 AS_IF([test "$lb_cv_module_loading" = yes],
336 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
337 [kernel module loading is possible])],
340 Kernel module loading support is highly recommended.
351 AC_DEFUN([LB_PROG_LINUX], [
355 LB_CHECK_CONFIG([MODULES], [], [
358 module support is required to build Lustre kernel modules.
362 LB_CHECK_CONFIG([MODVERSIONS])
364 LB_CHECK_CONFIG([KALLSYMS], [], [
367 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
378 # Determine if the target is a dpkg system or rpm
380 AC_DEFUN([LB_USES_DPKG], [
381 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
383 AS_CASE([$(lsb_release -i -s 2>/dev/null)],
384 [Ubuntu | Debian], [lb_cv_uses_dpkg="yes"])
386 uses_dpkg=$lb_cv_uses_dpkg
392 # check symbol exported or not
394 # $2 - file(s) for find.
398 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
400 AC_DEFUN([LB_CHECK_EXPORT], [
401 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
402 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
403 AS_VAR_SET([lb_export], [no])
404 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
405 [AS_VAR_SET([lb_export], [yes])],
407 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
408 AS_VAR_SET([lb_export], [yes])
413 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
414 AS_VAR_POPDEF([lb_export])dnl
420 # check if a given config option is defined
425 AC_DEFUN([LB_CHECK_CONFIG], [
426 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
428 #include <$AUTOCONF_HDIR/autoconf.h>
431 #error CONFIG_$1 not #defined
439 # check if a given config option is builtin or as module
440 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
444 AC_DEFUN([LB_CHECK_CONFIG_IM], [
445 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
447 #include <$AUTOCONF_HDIR/autoconf.h>
449 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
450 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
453 ]) # LB_CHECK_CONFIG_IM
456 # these are like AC_TRY_COMPILE, but try to build modules against the
457 # kernel, inside the build directory
461 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
462 # --------------------------------------
464 m4_define([LB_LANG_PROGRAM],
466 #include <linux/kernel.h>
471 dnl Do *not* indent the following line: there may be CPP directives.
472 dnl Don't move the `;' right after for the same reason.
479 # LB_LINUX_COMPILE_IFELSE
481 # like AC_COMPILE_IFELSE
483 # $1 - AC_LANG_SOURCE()
489 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
490 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
491 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
492 SUBARCH=$(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/')
493 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 -I$SPL/include } ${ZFS:+-I$ZFS -I$ZFS/include} -include $CONFIG_INCLUDE" -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])],
495 [_AC_MSG_LOG_CONFTEST
496 m4_ifvaln([$5],[$5])dnl])
497 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
501 # LB_LINUX_TRY_COMPILE
503 # like AC_TRY_COMPILE
505 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
506 LB_LINUX_COMPILE_IFELSE(
507 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
508 [modules], [test -s build/conftest.o],
515 # like LB_LINUX_TRY_COMPILE, but with different arguments
517 AC_DEFUN([LB_LINUX_TRY_MAKE], [
518 LB_LINUX_COMPILE_IFELSE(
519 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
520 [$3], [$4], [$5], [$6])
525 # $1 - checking message
532 AC_DEFUN([LB_CHECK_COMPILE], [
533 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
534 AC_CACHE_CHECK([$1], lb_compile, [
535 LB_LINUX_TRY_COMPILE([$3], [$4],
536 [AS_VAR_SET([lb_compile], [yes])],
537 [AS_VAR_SET([lb_compile], [no])])
539 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
540 AS_VAR_POPDEF([lb_compile])dnl
541 ]) # LB_CHECK_COMPILE
544 # LB_CHECK_LINUX_HEADER
546 # Like AC_CHECK_HEADER but checks for a kernel-space header
548 m4_define([LB_CHECK_LINUX_HEADER], [
549 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
550 AC_CACHE_CHECK([for $1], lb_header, [
551 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
552 [modules], [test -s build/conftest.o],
553 [AS_VAR_SET([lb_header], [yes])],
554 [AS_VAR_SET([lb_header], [no])])
556 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
557 AS_VAR_POPDEF([lb_header])dnl
558 ]) # LB_CHECK_LINUX_HEADER