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=$lb_cv_utsrelease
67 AC_SUBST(LINUXRELEASE)
73 # get the release version of linux
75 AC_DEFUN([LB_LINUX_RELEASE], [
78 # ------------ RELEASE --------------------------------
79 AC_MSG_CHECKING([for Lustre release])
80 AC_ARG_WITH([release],
81 AC_HELP_STRING([--with-release=string],
82 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
85 AS_IF([test "$DOWNSTREAM_RELEASE"], [RELEASE="${DOWNSTREAM_RELEASE}_"])
86 RELEASE="$RELEASE$(echo $LINUXRELEASE | tr '-' '_')_$BUILDID"])
87 AC_MSG_RESULT($RELEASE)
90 # check if the kernel is one from RHEL or SUSE
91 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
92 lb_cv_rhel_kernel_version=""
93 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
94 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
95 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
96 '/ RHEL_MINOR / { print [$]3 }' \
97 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
100 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
102 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
105 LB_CHECK_CONFIG([SUSE_KERNEL], [SUSE_KERNEL="yes"], [SUSE_KERNEL="no"])
108 AC_MSG_CHECKING([for Linux kernel module package directory])
109 AC_ARG_WITH([kmp-moddir],
110 AC_HELP_STRING([--with-kmp-moddir=string],
111 [set the kmod updates or extra directory]),
112 [KMP_MODDIR=$withval],[
113 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra"],
114 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates"])])
115 AC_MSG_RESULT($KMP_MODDIR)
118 moduledir='/lib/modules/$(LINUXRELEASE)/$(KMP_MODDIR)/kernel'
121 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
122 AC_SUBST(modulefsdir)
124 modulenetdir='$(moduledir)/net/$(PACKAGE)'
125 AC_SUBST(modulenetdir)
129 # LB_LINUX_SYMVERFILE
131 # SLES 9 uses a different name for this file - unsure about vanilla kernels
132 # around this version, but it matters for servers only.
133 AC_DEFUN([LB_LINUX_SYMVERFILE], [
134 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
135 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
136 [lb_cv_module_symvers=Modules.symvers],
137 [lb_cv_module_symvers=Module.symvers])
139 SYMVERFILE=$lb_cv_module_symvers
144 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
146 AC_DEFUN([LB_ARG_REPLACE_PATH], [
148 eval set -- $ac_configure_args
152 arg=--with-[$1]=[$2] ;;
154 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
156 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
157 new_configure_args="$new_configure_args '$arg'"
159 ac_configure_args=$new_configure_args
163 # __LB_ARG_CANON_PATH
165 # this is the work-horse of the next function
167 AC_DEFUN([__LB_ARG_CANON_PATH], [
168 [$3]=$(readlink -f $with_$2)
169 LB_ARG_REPLACE_PATH([$1], $[$3])
175 # a front-end for the above function that transforms - and . in the
176 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
178 AC_DEFUN([LB_ARG_CANON_PATH], [
179 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
185 # Find paths for linux, handling kernel-source rpms
187 AC_DEFUN([LB_LINUX_PATH], [
188 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
189 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
191 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
192 PATHS="/lib/modules/$(uname -r)/build"
194 PATHS+=" $DEFAULT_LINUX"
195 for DEFAULT_LINUX_OBJ in $PATHS; do
196 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
199 AC_MSG_CHECKING([for Linux sources])
201 AC_HELP_STRING([--with-linux=path],
202 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
203 [LB_ARG_CANON_PATH([linux], [LINUX])
204 DEFAULT_LINUX_OBJ=$LINUX],
205 [LINUX=$DEFAULT_LINUX])
206 AC_MSG_RESULT([$LINUX])
209 # -------- check for linux --------
210 LB_CHECK_FILE([$LINUX], [],
211 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
213 # -------- linux objects (for 2.6) --
214 AC_MSG_CHECKING([for Linux objects])
215 AC_ARG_WITH([linux-obj],
216 AC_HELP_STRING([--with-linux-obj=path],
217 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
218 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
219 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
220 AC_MSG_RESULT([$LINUX_OBJ])
223 # -------- check for .config --------
224 AC_ARG_WITH([linux-config],
225 [AC_HELP_STRING([--with-linux-config=path],
226 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
227 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
228 [LINUX_CONFIG=$LINUX_OBJ/.config])
230 # -------- check if .config exists --
231 LB_CHECK_FILE([$LINUX_CONFIG], [],
234 Kernel config could not be found.
236 If you are building from a kernel-source rpm consult build/README.kernel-source
239 AC_SUBST(LINUX_CONFIG)
241 LB_CHECK_FILE([/boot/kernel.h],
242 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
243 [LB_CHECK_FILE([/var/adm/running-kernel.h],
244 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
246 AC_ARG_WITH([kernel-source-header],
247 AC_HELP_STRING([--with-kernel-source-header=path],
248 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
249 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
251 # ----------- make dep run? ------------------
252 # at 2.6.19 # $LINUX/include/linux/config.h is removed
253 # and at more old has only one line include <autoconf.h>
255 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
256 [AUTOCONF_HDIR=generated],
257 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
258 [AUTOCONF_HDIR=linux],
259 [AC_MSG_ERROR([Run make config in $LINUX.])])])
260 AC_SUBST(AUTOCONF_HDIR)
262 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
263 [VERSION_HDIR=linux],
264 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
265 [VERSION_HDIR=generated/uapi/linux],
266 [AC_MSG_ERROR([Run make config in $LINUX.])])])
267 AC_SUBST(VERSION_HDIR)
269 # ----------- kconfig.h exists ---------------
270 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
271 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
273 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
274 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
275 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
276 AC_SUBST(CONFIG_INCLUDE)
278 # ------------ rhconfig.h includes runtime-generated bits --
279 # RedHat kernel-source checks
281 # we know this exists after the check above. if the user
282 # tarred up the tree and ran make dep etc. in it, then
283 # version.h gets overwritten with a standard linux one.
285 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
286 # This is a clean kernel-source tree, we need to
287 # enable extensive workarounds to get this to build modules
288 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
289 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
292 Using /boot/kernel.h from RUNNING kernel.
294 If this is not what you want, use --with-kernel-source-header.
295 Consult build/README.kernel-source for details.
300 $KERNEL_SOURCE_HEADER not found.
302 Consult build/README.kernel-source for details.
305 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
308 # this is needed before we can build modules
311 # --- check that we can build modules at all
312 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
316 Kernel modules cannot be built. Consult config.log for details.
318 If you are trying to build with a kernel-source rpm,
319 consult build/README.kernel-source
324 ]) # end of LB_LINUX_PATH
329 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
330 # so we test if request_module is implemented or not
331 AC_DEFUN([LC_MODULE_LOADING], [
332 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
334 #include <linux/kmod.h>
336 int myretval=ENOSYS ;
339 $makerule LUSTRE_KERNEL_TEST=conftest.i
341 grep request_module build/conftest.i |dnl
342 grep -v `grep "int myretval=" build/conftest.i |dnl
343 cut -d= -f2 | cut -d" " -f1`dnl
345 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
347 AS_IF([test "$lb_cv_module_loading" = yes],
348 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
349 [kernel module loading is possible])],
352 Kernel module loading support is highly recommended.
363 AC_DEFUN([LB_PROG_LINUX], [
367 LB_CHECK_CONFIG([MODULES], [], [
370 module support is required to build Lustre kernel modules.
374 LB_CHECK_CONFIG([MODVERSIONS])
376 LB_CHECK_CONFIG([KALLSYMS], [], [
379 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
390 # Determine if the target is a dpkg system or rpm
392 AC_DEFUN([LB_USES_DPKG], [
393 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
395 AS_CASE([$(lsb_release -i -s 2>/dev/null)],
396 [Ubuntu | Debian], [lb_cv_uses_dpkg="yes"])
398 uses_dpkg=$lb_cv_uses_dpkg
404 # check symbol exported or not
406 # $2 - file(s) for find.
410 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
412 AC_DEFUN([LB_CHECK_EXPORT], [
413 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
414 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
415 AS_VAR_SET([lb_export], [no])
416 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
417 [AS_VAR_SET([lb_export], [yes])],
419 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
420 AS_VAR_SET([lb_export], [yes])
425 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
426 AS_VAR_POPDEF([lb_export])dnl
432 # check if a given config option is defined
437 AC_DEFUN([LB_CHECK_CONFIG], [
438 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
440 #include <$AUTOCONF_HDIR/autoconf.h>
443 #error CONFIG_$1 not #defined
451 # check if a given config option is builtin or as module
452 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
456 AC_DEFUN([LB_CHECK_CONFIG_IM], [
457 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
459 #include <$AUTOCONF_HDIR/autoconf.h>
461 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
462 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
465 ]) # LB_CHECK_CONFIG_IM
468 # these are like AC_TRY_COMPILE, but try to build modules against the
469 # kernel, inside the build directory
473 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
474 # --------------------------------------
476 m4_define([LB_LANG_PROGRAM],
478 #include <linux/kernel.h>
483 dnl Do *not* indent the following line: there may be CPP directives.
484 dnl Don't move the `;' right after for the same reason.
491 # LB_LINUX_COMPILE_IFELSE
493 # like AC_COMPILE_IFELSE
495 # $1 - AC_LANG_SOURCE()
501 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
502 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
503 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
504 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64le/powerpc/' -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/' -e 's/aarch64/arm64/')
505 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] ${LD:+"LD=$LD"} CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_OFED_INCLUDE -I$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])],
507 [_AC_MSG_LOG_CONFTEST
508 m4_ifvaln([$5],[$5])dnl])
509 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
513 # LB_LINUX_TRY_COMPILE
515 # like AC_TRY_COMPILE
517 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
518 LB_LINUX_COMPILE_IFELSE(
519 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
520 [modules], [test -s build/conftest.o],
527 # like LB_LINUX_TRY_COMPILE, but with different arguments
529 AC_DEFUN([LB_LINUX_TRY_MAKE], [
530 LB_LINUX_COMPILE_IFELSE(
531 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
532 [$3], [$4], [$5], [$6])
537 # $1 - checking message
544 AC_DEFUN([LB_CHECK_COMPILE], [
545 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
546 AC_CACHE_CHECK([$1], lb_compile, [
547 LB_LINUX_TRY_COMPILE([$3], [$4],
548 [AS_VAR_SET([lb_compile], [yes])],
549 [AS_VAR_SET([lb_compile], [no])])
551 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
552 AS_VAR_POPDEF([lb_compile])dnl
553 ]) # LB_CHECK_COMPILE
556 # LB_CHECK_LINUX_HEADER
558 # Like AC_CHECK_HEADER but checks for a kernel-space header
560 m4_define([LB_CHECK_LINUX_HEADER], [
561 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
562 AC_CACHE_CHECK([for $1], lb_header, [
563 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
564 [modules], [test -s build/conftest.o],
565 [AS_VAR_SET([lb_header], [yes])],
566 [AS_VAR_SET([lb_header], [no])])
568 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
569 AS_VAR_POPDEF([lb_header])dnl
570 ]) # LB_CHECK_LINUX_HEADER