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)]),
84 RELEASE="$(echo $LINUXRELEASE | tr '-' '_')"])
85 AC_MSG_RESULT($RELEASE)
88 # check if the kernel is one from RHEL or SUSE
89 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
90 lb_cv_rhel_kernel_version=""
91 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
92 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
93 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
94 '/ RHEL_MINOR / { print [$]3 }' \
95 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
98 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
100 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
103 LB_CHECK_CONFIG([SUSE_KERNEL], [SUSE_KERNEL="yes"], [SUSE_KERNEL="no"])
106 AC_MSG_CHECKING([for Linux kernel module package directory])
107 AC_ARG_WITH([kmp-moddir],
108 AC_HELP_STRING([--with-kmp-moddir=string],
109 [set the kmod updates or extra directory]),
112 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
113 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"])
114 IN_KERNEL="${PACKAGE}"])
115 AC_MSG_RESULT($KMP_MODDIR)
117 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
119 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
120 AC_SUBST(modulefsdir)
122 modulenetdir="${moduledir}/net/${IN_KERNEL}"
123 AC_SUBST(modulenetdir)
127 # LB_LINUX_SYMVERFILE
129 # SLES 9 uses a different name for this file - unsure about vanilla kernels
130 # around this version, but it matters for servers only.
131 AC_DEFUN([LB_LINUX_SYMVERFILE], [
132 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
133 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
134 [lb_cv_module_symvers=Modules.symvers],
135 [lb_cv_module_symvers=Module.symvers])
137 SYMVERFILE=$lb_cv_module_symvers
142 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
144 AC_DEFUN([LB_ARG_REPLACE_PATH], [
146 eval set -- $ac_configure_args
150 arg=--with-[$1]=[$2] ;;
152 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
154 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
155 new_configure_args="$new_configure_args '$arg'"
157 ac_configure_args=$new_configure_args
161 # __LB_ARG_CANON_PATH
163 # this is the work-horse of the next function
165 AC_DEFUN([__LB_ARG_CANON_PATH], [
166 [$3]=$(readlink -f $with_$2)
167 LB_ARG_REPLACE_PATH([$1], $[$3])
173 # a front-end for the above function that transforms - and . in the
174 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
176 AC_DEFUN([LB_ARG_CANON_PATH], [
177 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
183 # Find paths for linux, handling kernel-source rpms
185 AC_DEFUN([LB_LINUX_PATH], [
186 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
187 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
189 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
190 PATHS="/lib/modules/$(uname -r)/build"
192 PATHS+=" $DEFAULT_LINUX"
193 for DEFAULT_LINUX_OBJ in $PATHS; do
194 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
197 AC_MSG_CHECKING([for Linux sources])
199 AC_HELP_STRING([--with-linux=path],
200 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
201 [LB_ARG_CANON_PATH([linux], [LINUX])
202 DEFAULT_LINUX_OBJ=$LINUX],
203 [LINUX=$DEFAULT_LINUX])
204 AC_MSG_RESULT([$LINUX])
207 # -------- check for linux --------
208 LB_CHECK_FILE([$LINUX], [],
209 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
211 # -------- linux objects (for 2.6) --
212 AC_MSG_CHECKING([for Linux objects])
213 AC_ARG_WITH([linux-obj],
214 AC_HELP_STRING([--with-linux-obj=path],
215 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
216 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
217 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
218 AC_MSG_RESULT([$LINUX_OBJ])
221 # -------- check for .config --------
222 AC_ARG_WITH([linux-config],
223 [AC_HELP_STRING([--with-linux-config=path],
224 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
225 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
226 [LINUX_CONFIG=$LINUX_OBJ/.config])
228 # -------- check if .config exists --
229 LB_CHECK_FILE([$LINUX_CONFIG], [],
232 Kernel config could not be found.
234 If you are building from a kernel-source rpm consult build/README.kernel-source
237 AC_SUBST(LINUX_CONFIG)
239 LB_CHECK_FILE([/boot/kernel.h],
240 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
241 [LB_CHECK_FILE([/var/adm/running-kernel.h],
242 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
244 AC_ARG_WITH([kernel-source-header],
245 AC_HELP_STRING([--with-kernel-source-header=path],
246 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
247 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
249 # ----------- make dep run? ------------------
250 # at 2.6.19 # $LINUX/include/linux/config.h is removed
251 # and at more old has only one line include <autoconf.h>
253 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
254 [AUTOCONF_HDIR=generated],
255 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
256 [AUTOCONF_HDIR=linux],
257 [AC_MSG_ERROR([Run make config in $LINUX.])])])
258 AC_SUBST(AUTOCONF_HDIR)
260 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
261 [VERSION_HDIR=linux],
262 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
263 [VERSION_HDIR=generated/uapi/linux],
264 [AC_MSG_ERROR([Run make config in $LINUX.])])])
265 AC_SUBST(VERSION_HDIR)
267 # ----------- kconfig.h exists ---------------
268 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
269 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
271 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
272 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
273 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
274 AC_SUBST(CONFIG_INCLUDE)
276 # ------------ rhconfig.h includes runtime-generated bits --
277 # RedHat kernel-source checks
279 # we know this exists after the check above. if the user
280 # tarred up the tree and ran make dep etc. in it, then
281 # version.h gets overwritten with a standard linux one.
283 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
284 # This is a clean kernel-source tree, we need to
285 # enable extensive workarounds to get this to build modules
286 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
287 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
290 Using /boot/kernel.h from RUNNING kernel.
292 If this is not what you want, use --with-kernel-source-header.
293 Consult build/README.kernel-source for details.
298 $KERNEL_SOURCE_HEADER not found.
300 Consult build/README.kernel-source for details.
303 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
306 # this is needed before we can build modules
309 # --- check that we can build modules at all
310 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
314 Kernel modules cannot be built. Consult config.log for details.
316 If you are trying to build with a kernel-source rpm,
317 consult build/README.kernel-source
322 ]) # end of LB_LINUX_PATH
327 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
328 # so we test if request_module is implemented or not
329 AC_DEFUN([LC_MODULE_LOADING], [
330 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
332 #include <linux/kmod.h>
334 int myretval=ENOSYS ;
337 $makerule LUSTRE_KERNEL_TEST=conftest.i
339 grep request_module build/conftest.i |dnl
340 grep -v `grep "int myretval=" build/conftest.i |dnl
341 cut -d= -f2 | cut -d" " -f1`dnl
343 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
345 AS_IF([test "$lb_cv_module_loading" = yes],
346 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
347 [kernel module loading is possible])],
350 Kernel module loading support is highly recommended.
361 AC_DEFUN([LB_PROG_LINUX], [
365 LB_CHECK_CONFIG([MODULES], [], [
368 module support is required to build Lustre kernel modules.
372 LB_CHECK_CONFIG([MODVERSIONS])
374 LB_CHECK_CONFIG([KALLSYMS], [], [
377 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
388 # Determine if the target is a dpkg system or rpm
390 AC_DEFUN([LB_USES_DPKG], [
391 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
393 AS_CASE([$(lsb_release -i -s 2>/dev/null)],
394 [Ubuntu | Debian], [lb_cv_uses_dpkg="yes"])
396 uses_dpkg=$lb_cv_uses_dpkg
402 # check symbol exported or not
404 # $2 - file(s) for find.
408 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
410 AC_DEFUN([LB_CHECK_EXPORT], [
411 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
412 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
413 AS_VAR_SET([lb_export], [no])
414 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
415 [AS_VAR_SET([lb_export], [yes])],
417 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
418 AS_VAR_SET([lb_export], [yes])
423 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
424 AS_VAR_POPDEF([lb_export])dnl
430 # check if a given config option is defined
435 AC_DEFUN([LB_CHECK_CONFIG], [
436 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
438 #include <$AUTOCONF_HDIR/autoconf.h>
441 #error CONFIG_$1 not #defined
449 # check if a given config option is builtin or as module
450 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
454 AC_DEFUN([LB_CHECK_CONFIG_IM], [
455 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
457 #include <$AUTOCONF_HDIR/autoconf.h>
459 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
460 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
463 ]) # LB_CHECK_CONFIG_IM
466 # these are like AC_TRY_COMPILE, but try to build modules against the
467 # kernel, inside the build directory
471 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
472 # --------------------------------------
474 m4_define([LB_LANG_PROGRAM],
476 #include <linux/kernel.h>
481 dnl Do *not* indent the following line: there may be CPP directives.
482 dnl Don't move the `;' right after for the same reason.
489 # LB_LINUX_COMPILE_IFELSE
491 # like AC_COMPILE_IFELSE
493 # $1 - AC_LANG_SOURCE()
499 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
500 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
501 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
502 SUBARCH=$(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/')
503 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="$EXTRA_CHECK_INCLUDE -I$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])],
505 [_AC_MSG_LOG_CONFTEST
506 m4_ifvaln([$5],[$5])dnl])
507 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
511 # LB_LINUX_TRY_COMPILE
513 # like AC_TRY_COMPILE
515 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
516 LB_LINUX_COMPILE_IFELSE(
517 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
518 [modules], [test -s build/conftest.o],
525 # like LB_LINUX_TRY_COMPILE, but with different arguments
527 AC_DEFUN([LB_LINUX_TRY_MAKE], [
528 LB_LINUX_COMPILE_IFELSE(
529 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
530 [$3], [$4], [$5], [$6])
535 # $1 - checking message
542 AC_DEFUN([LB_CHECK_COMPILE], [
543 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
544 AC_CACHE_CHECK([$1], lb_compile, [
545 LB_LINUX_TRY_COMPILE([$3], [$4],
546 [AS_VAR_SET([lb_compile], [yes])],
547 [AS_VAR_SET([lb_compile], [no])])
549 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
550 AS_VAR_POPDEF([lb_compile])dnl
551 ]) # LB_CHECK_COMPILE
554 # LB_CHECK_LINUX_HEADER
556 # Like AC_CHECK_HEADER but checks for a kernel-space header
558 m4_define([LB_CHECK_LINUX_HEADER], [
559 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
560 AC_CACHE_CHECK([for $1], lb_header, [
561 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
562 [modules], [test -s build/conftest.o],
563 [AS_VAR_SET([lb_header], [yes])],
564 [AS_VAR_SET([lb_header], [no])])
566 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
567 AS_VAR_POPDEF([lb_header])dnl
568 ]) # LB_CHECK_LINUX_HEADER