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 version], 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 [RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
95 $LINUX_OBJ/include/$VERSION_HDIR/version.h) + 1)
96 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< $LINUXRELEASE)
97 lb_cv_rhel_kernel_version=${KERNEL_VERSION}-${RHEL_RELEASE}])
99 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
101 RHEL_KERNEL_VERSION=$lb_cv_rhel_kernel_version
104 LB_CHECK_CONFIG([SUSE_KERNEL], [SUSE_KERNEL="yes"], [SUSE_KERNEL="no"])
107 AC_MSG_CHECKING([for Linux kernel module package directory])
108 AC_ARG_WITH([kmp-moddir],
109 AC_HELP_STRING([--with-kmp-moddir=string],
110 [set the kmod updates or extra directory]),
111 [KMP_MODDIR=$withval],[
112 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra"],
113 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates"])])
114 AC_MSG_RESULT($KMP_MODDIR)
117 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/$(KMP_MODDIR)/kernel'
120 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
121 AC_SUBST(modulefsdir)
123 modulenetdir='$(moduledir)/net/$(PACKAGE)'
124 AC_SUBST(modulenetdir)
128 # LB_LINUX_SYMVERFILE
130 # SLES 9 uses a different name for this file - unsure about vanilla kernels
131 # around this version, but it matters for servers only.
132 AC_DEFUN([LB_LINUX_SYMVERFILE], [
133 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
134 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
135 [lb_cv_module_symvers=Modules.symvers],
136 [lb_cv_module_symvers=Module.symvers])
138 SYMVERFILE=$lb_cv_module_symvers
145 # check for cross compilation
147 AC_DEFUN([LB_LINUX_CROSS], [
148 AC_CACHE_CHECK([for cross compilation], lb_cv_cross, [
150 AS_IF([test "x$cross_compiling" = xyes],
151 [AS_CASE([$host_vendor],
153 # The K1OM architecture is an extension of the x86 architecture
154 # and in MPSS 2.1 it's defined in $host_vendor. But in MPSS 3.x
155 # it's defined in $host_arch. So, try to support both case.
156 lb_cv_cross=$($CC -v 2>&1 | grep Target: | sed -e 's/Target: //')
157 AS_IF([test "$lb_cv_cross" != x86_64-k1om-linux -a \
158 "$lb_cv_cross" != k1om-mpss-linux], [
159 AC_MSG_ERROR([Cross compiler not found in PATH.])
164 AS_IF([test "$lb_cv_cross" = x86_64-k1om-linux -o \
165 "$lb_cv_cross" = k1om-mpss-linux], [
166 CROSS_VARS="ARCH=k1om CROSS_COMPILE=${lb_cv_cross}-"
167 CROSS_PATH="${CROSS_PATH:=/opt/lustre/$VERSION/$lb_cv_cross}"
169 # need to produce special section for debuginfo extraction
170 LDFLAGS="$LDFLAGS -Wl,--build-id"
171 EXTRA_KLDFLAGS="$EXTRA_KLDFLAGS -Wl,--build-id"
172 AS_IF([test "x$enable_server" != xno], [
173 AC_MSG_WARN([Disabling server (not supported for $lb_cv_cross).])
176 AS_IF([test "x$enable_mpitests" != xno], [
177 AC_MSG_WARN([Disabling MPI tests (not supported for $lb_cv_cross).])
186 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
188 AC_DEFUN([LB_ARG_REPLACE_PATH], [
190 eval set -- $ac_configure_args
194 arg=--with-[$1]=[$2] ;;
196 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
198 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
199 new_configure_args="$new_configure_args '$arg'"
201 ac_configure_args=$new_configure_args
205 # __LB_ARG_CANON_PATH
207 # this is the work-horse of the next function
209 AC_DEFUN([__LB_ARG_CANON_PATH], [
210 [$3]=$(readlink -f $with_$2)
211 LB_ARG_REPLACE_PATH([$1], $[$3])
217 # a front-end for the above function that transforms - and . in the
218 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
220 AC_DEFUN([LB_ARG_CANON_PATH], [
221 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
227 # Find paths for linux, handling kernel-source rpms
229 AC_DEFUN([LB_LINUX_PATH], [
230 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
231 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
233 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
234 PATHS="/lib/modules/$(uname -r)/build"
236 PATHS+=" $DEFAULT_LINUX"
237 for DEFAULT_LINUX_OBJ in $PATHS; do
238 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
241 AC_MSG_CHECKING([for Linux sources])
243 AC_HELP_STRING([--with-linux=path],
244 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
245 [LB_ARG_CANON_PATH([linux], [LINUX])
246 DEFAULT_LINUX_OBJ=$LINUX],
247 [LINUX=$DEFAULT_LINUX])
248 AC_MSG_RESULT([$LINUX])
251 # -------- check for linux --------
252 LB_CHECK_FILE([$LINUX], [],
253 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
255 # -------- linux objects (for 2.6) --
256 AC_MSG_CHECKING([for Linux objects])
257 AC_ARG_WITH([linux-obj],
258 AC_HELP_STRING([--with-linux-obj=path],
259 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
260 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
261 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
262 AC_MSG_RESULT([$LINUX_OBJ])
265 # -------- check for .config --------
266 AC_ARG_WITH([linux-config],
267 [AC_HELP_STRING([--with-linux-config=path],
268 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
269 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
270 [LINUX_CONFIG=$LINUX_OBJ/.config])
272 # -------- check if .config exists --
273 LB_CHECK_FILE([$LINUX_CONFIG], [],
276 Kernel config could not be found.
278 If you are building from a kernel-source rpm consult build/README.kernel-source
281 AC_SUBST(LINUX_CONFIG)
283 LB_CHECK_FILE([/boot/kernel.h],
284 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
285 [LB_CHECK_FILE([/var/adm/running-kernel.h],
286 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
288 AC_ARG_WITH([kernel-source-header],
289 AC_HELP_STRING([--with-kernel-source-header=path],
290 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
291 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
293 # ----------- make dep run? ------------------
294 # at 2.6.19 # $LINUX/include/linux/config.h is removed
295 # and at more old has only one line include <autoconf.h>
297 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
298 [AUTOCONF_HDIR=generated],
299 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
300 [AUTOCONF_HDIR=linux],
301 [AC_MSG_ERROR([Run make config in $LINUX.])])])
302 AC_SUBST(AUTOCONF_HDIR)
304 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
305 [VERSION_HDIR=linux],
306 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
307 [VERSION_HDIR=generated/uapi/linux],
308 [AC_MSG_ERROR([Run make config in $LINUX.])])])
309 AC_SUBST(VERSION_HDIR)
311 # ----------- kconfig.h exists ---------------
312 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
313 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
315 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
316 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
317 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
318 AC_SUBST(CONFIG_INCLUDE)
320 # ------------ rhconfig.h includes runtime-generated bits --
321 # RedHat kernel-source checks
323 # we know this exists after the check above. if the user
324 # tarred up the tree and ran make dep etc. in it, then
325 # version.h gets overwritten with a standard linux one.
327 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
328 # This is a clean kernel-source tree, we need to
329 # enable extensive workarounds to get this to build modules
330 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
331 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
334 Using /boot/kernel.h from RUNNING kernel.
336 If this is not what you want, use --with-kernel-source-header.
337 Consult build/README.kernel-source for details.
342 $KERNEL_SOURCE_HEADER not found.
344 Consult build/README.kernel-source for details.
347 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
350 # this is needed before we can build modules
354 # --- check that we can build modules at all
355 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
359 Kernel modules cannot be built. Consult config.log for details.
361 If you are trying to build with a kernel-source rpm,
362 consult build/README.kernel-source
367 ]) # end of LB_LINUX_PATH
372 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
373 # so we test if request_module is implemented or not
374 AC_DEFUN([LC_MODULE_LOADING], [
375 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
377 #include <linux/kmod.h>
379 int myretval=ENOSYS ;
382 $makerule LUSTRE_KERNEL_TEST=conftest.i
384 grep request_module build/conftest.i |dnl
385 grep -v `grep "int myretval=" build/conftest.i |dnl
386 cut -d= -f2 | cut -d" " -f1`dnl
388 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
390 AS_IF([test "$lb_cv_module_loading" = yes],
391 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
392 [kernel module loading is possible])],
395 Kernel module loading support is highly recommended.
406 AC_DEFUN([LB_PROG_LINUX], [
410 LB_CHECK_CONFIG([MODULES], [], [
413 module support is required to build Lustre kernel modules.
417 LB_CHECK_CONFIG([MODVERSIONS])
419 LB_CHECK_CONFIG([KALLSYMS], [], [
422 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
433 # Determine if the target is a dpkg system or rpm
435 AC_DEFUN([LB_USES_DPKG], [
436 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
438 AS_CASE([$(lsb_release -i -s 2>/dev/null)],
439 [Ubuntu | Debian], [lb_cv_uses_dpkg="yes"])
441 uses_dpkg=$lb_cv_uses_dpkg
447 # check symbol exported or not
449 # $2 - file(s) for find.
453 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
455 AC_DEFUN([LB_CHECK_EXPORT], [
456 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
457 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
458 AS_VAR_SET([lb_export], [no])
459 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
460 [AS_VAR_SET([lb_export], [yes])],
462 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
463 AS_VAR_SET([lb_export], [yes])
468 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
469 AS_VAR_POPDEF([lb_export])dnl
475 # check if a given config option is defined
480 AC_DEFUN([LB_CHECK_CONFIG], [
481 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
483 #include <$AUTOCONF_HDIR/autoconf.h>
486 #error CONFIG_$1 not #defined
494 # check if a given config option is builtin or as module
495 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
499 AC_DEFUN([LB_CHECK_CONFIG_IM], [
500 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
502 #include <$AUTOCONF_HDIR/autoconf.h>
504 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
505 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
508 ]) # LB_CHECK_CONFIG_IM
511 # these are like AC_TRY_COMPILE, but try to build modules against the
512 # kernel, inside the build directory
516 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
517 # --------------------------------------
519 m4_define([LB_LANG_PROGRAM],
521 #include <linux/kernel.h>
526 dnl Do *not* indent the following line: there may be CPP directives.
527 dnl Don't move the `;' right after for the same reason.
534 # LB_LINUX_COMPILE_IFELSE
536 # like AC_COMPILE_IFELSE
538 # $1 - AC_LANG_SOURCE()
544 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
545 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
546 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
547 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/')
548 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" $CROSS_VARS $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
550 [_AC_MSG_LOG_CONFTEST
551 m4_ifvaln([$5],[$5])dnl])
552 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
556 # LB_LINUX_TRY_COMPILE
558 # like AC_TRY_COMPILE
560 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
561 LB_LINUX_COMPILE_IFELSE(
562 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
563 [modules], [test -s build/conftest.o],
570 # like LB_LINUX_TRY_COMPILE, but with different arguments
572 AC_DEFUN([LB_LINUX_TRY_MAKE], [
573 LB_LINUX_COMPILE_IFELSE(
574 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
575 [$3], [$4], [$5], [$6])
580 # $1 - checking message
587 AC_DEFUN([LB_CHECK_COMPILE], [
588 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
589 AC_CACHE_CHECK([$1], lb_compile, [
590 LB_LINUX_TRY_COMPILE([$3], [$4],
591 [AS_VAR_SET([lb_compile], [yes])],
592 [AS_VAR_SET([lb_compile], [no])])
594 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
595 AS_VAR_POPDEF([lb_compile])dnl
596 ]) # LB_CHECK_COMPILE
599 # LB_CHECK_LINUX_HEADER
601 # Like AC_CHECK_HEADER but checks for a kernel-space header
603 m4_define([LB_CHECK_LINUX_HEADER], [
604 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
605 AC_CACHE_CHECK([for $1], lb_header, [
606 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
607 [modules], [test -s build/conftest.o],
608 [AS_VAR_SET([lb_header], [yes])],
609 [AS_VAR_SET([lb_header], [no])])
611 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
612 AS_VAR_POPDEF([lb_header])dnl
613 ]) # LB_CHECK_LINUX_HEADER