4 # Set things accordingly for a linux kernel
6 AC_DEFUN([LB_LINUX_VERSION],[
9 MODULE_TARGET="SUBDIRS"
11 AC_MSG_CHECKING([for external module build support])
12 rm -f build/conftest.i
13 LB_LINUX_TRY_MAKE([],[],
14 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
15 [test -s build/conftest.i],
19 makerule="_module_$makerule"
21 LB_LINUX_TRY_MAKE([],[],
22 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
23 [test -s build/conftest.i],
27 AC_MSG_ERROR([unknown; check config.log for details])
31 AC_SUBST(MODULE_TARGET)
38 # Determine the Linux kernel version string from the utsrelease
40 AC_DEFUN([LB_LINUX_UTSRELEASE], [
41 AC_MSG_CHECKING([kernel source version])
43 utsrelease1=${LINUX_OBJ}/include/generated/utsrelease.h
44 utsrelease2=${LINUX_OBJ}/include/linux/utsrelease.h
45 utsrelease3=${LINUX_OBJ}/include/linux/version.h
46 AS_IF([test -r ${utsrelease1} && fgrep -q UTS_RELEASE ${utsrelease1}], [
47 utsrelease=${utsrelease1}
48 ], [test -r ${utsrelease2} && fgrep -q UTS_RELEASE ${utsrelease2}], [
49 utsrelease=${utsrelease2}
50 ], [test -r ${utsrelease3} && fgrep -q UTS_RELEASE ${utsrelease3}], [
51 utsrelease=${utsrelease3}
54 AS_IF([test ! -z "${utsrelease}"], [
55 UTS_RELEASE=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' \
57 AS_IF([test -z "$UTS_RELEASE"], [
58 AC_MSG_RESULT([Not found])
59 AC_MSG_ERROR([*** Cannot determine kernel version.])
62 AC_MSG_RESULT([Not found])
64 *** Cannot find UTS_RELEASE definition.
65 *** This is often provided by the kernel-devel package.])
68 AC_MSG_RESULT([${UTS_RELEASE}])
70 LINUX_VERSION=${UTS_RELEASE}
71 AC_SUBST(LINUX_VERSION)
72 LINUXRELEASE=${UTS_RELEASE}
73 AC_SUBST(LINUXRELEASE)
80 # get the release version of linux
82 AC_DEFUN([LB_LINUX_RELEASE],
86 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/updates/kernel'
89 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
92 modulenetdir='$(moduledir)/net/$(PACKAGE)'
93 AC_SUBST(modulenetdir)
95 # ------------ RELEASE --------------------------------
96 AC_MSG_CHECKING([for Lustre release])
97 AC_ARG_WITH([release],[
98 AC_HELP_STRING([--with-release=string],
99 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
102 if test -n "$DOWNSTREAM_RELEASE"; then
103 RELEASE="${DOWNSTREAM_RELEASE}_"
105 RELEASE="$RELEASE`echo ${LINUXRELEASE} | tr '-' '_'`_$BUILDID"
107 AC_MSG_RESULT($RELEASE)
110 # check if the kernel is one from RHEL or SUSE
111 AC_MSG_CHECKING([for RedHat kernel version])
112 AS_IF([fgrep -q RHEL_RELEASE ${LINUX_OBJ}/include/$VERSION_HDIR/version.h], [
114 RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
115 ${LINUX_OBJ}/include/$VERSION_HDIR/version.h) + 1)
116 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< ${LINUXRELEASE})
117 RHEL_KERNEL_VERSION=${KERNEL_VERSION}-${RHEL_RELEASE}
118 AC_SUBST(RHEL_KERNEL_VERSION)
119 AC_MSG_RESULT([${RHEL_KERNEL_VERSION}])
121 AC_MSG_RESULT([not found])
122 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
126 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
127 AC_DEFUN([LB_ARG_REPLACE_PATH],[
129 eval "set x $ac_configure_args"
137 arg=$(printf %s\n ["$arg"] | \
138 sed "s/'/'\\\\\\\\''/g")
141 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
142 new_configure_args="$new_configure_args \"$arg\""
144 ac_configure_args=$new_configure_args
147 # this is the work-horse of the next function
148 AC_DEFUN([__LB_ARG_CANON_PATH], [
149 [$3]=$(readlink -f $with_$2)
150 LB_ARG_REPLACE_PATH([$1], $[$3])
153 # a front-end for the above function that transforms - and . in the
154 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
155 AC_DEFUN([LB_ARG_CANON_PATH], [
156 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
163 # Find paths for linux, handling kernel-source rpms
165 AC_DEFUN([LB_LINUX_PATH],
166 [# prep some default values
167 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
168 if readlink -q -e $DEFAULT_LINUX; then
172 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
173 PATHS="/lib/modules/$(uname -r)/build"
175 PATHS+=" $DEFAULT_LINUX"
176 for DEFAULT_LINUX_OBJ in $PATHS; do
177 if readlink -q -e $DEFAULT_LINUX_OBJ; then
181 AC_MSG_CHECKING([for Linux sources])
183 AC_HELP_STRING([--with-linux=path],
184 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
185 [LB_ARG_CANON_PATH([linux], [LINUX])
186 DEFAULT_LINUX_OBJ=$LINUX],
187 [LINUX=$DEFAULT_LINUX])
188 AC_MSG_RESULT([$LINUX])
191 # -------- check for linux --------
192 LB_CHECK_FILE([$LINUX],[],
193 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
195 # -------- linux objects (for 2.6) --
196 AC_MSG_CHECKING([for Linux objects dir])
197 AC_ARG_WITH([linux-obj],
198 AC_HELP_STRING([--with-linux-obj=path],
199 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
200 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
201 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
203 AC_MSG_RESULT([$LINUX_OBJ])
206 # -------- check for .config --------
207 AC_ARG_WITH([linux-config],
208 [AC_HELP_STRING([--with-linux-config=path],
209 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
210 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
211 [LINUX_CONFIG=$LINUX_OBJ/.config])
212 AC_SUBST(LINUX_CONFIG)
214 LB_CHECK_FILE([/boot/kernel.h],
215 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
216 [LB_CHECK_FILE([/var/adm/running-kernel.h],
217 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
219 AC_ARG_WITH([kernel-source-header],
220 AC_HELP_STRING([--with-kernel-source-header=path],
221 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
222 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
224 # ------------ .config exists ----------------
225 LB_CHECK_FILE([$LINUX_CONFIG],[],
226 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
228 # ----------- make dep run? ------------------
229 # at 2.6.19 # $LINUX/include/linux/config.h is removed
230 # and at more old has only one line
231 # include <autoconf.h>
232 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated],
233 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
234 [AC_MSG_ERROR([Run make config in $LINUX.])])])
235 AC_SUBST(AUTOCONF_HDIR)
236 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h], [VERSION_HDIR=linux],
237 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
238 [VERSION_HDIR=generated/uapi/linux],
239 [AC_MSG_ERROR([Run make config in $LINUX.])])
241 AC_SUBST(VERSION_HDIR)
243 # ----------- kconfig.h exists ---------------
244 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
245 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
246 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
247 [CONFIG_INCLUDE=include/linux/kconfig.h],
248 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
249 AC_SUBST(CONFIG_INCLUDE)
251 # ------------ rhconfig.h includes runtime-generated bits --
252 # red hat kernel-source checks
254 # we know this exists after the check above. if the user
255 # tarred up the tree and ran make dep etc. in it, then
256 # version.h gets overwritten with a standard linux one.
258 if grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null ; then
259 # This is a clean kernel-source tree, we need to
260 # enable extensive workarounds to get this to build
262 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
263 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
264 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
265 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
266 AC_MSG_WARN([Consult build/README.kernel-source for details.])
268 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
269 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
272 # this is needed before we can build modules
276 # --- check that we can build modules at all
277 AC_MSG_CHECKING([that modules can be built at all])
278 LB_LINUX_TRY_COMPILE([],[],[
282 AC_MSG_WARN([Consult config.log for details.])
283 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
284 AC_MSG_ERROR([Kernel modules cannot be built.])
288 ]) # end of LB_LINUX_PATH
290 # LB_LINUX_SYMVERFILE
291 # SLES 9 uses a different name for this file - unsure about vanilla kernels
292 # around this version, but it matters for servers only.
293 AC_DEFUN([LB_LINUX_SYMVERFILE],
294 [AC_MSG_CHECKING([name of module symbol version file])
295 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
296 SYMVERFILE=Modules.symvers
298 SYMVERFILE=Module.symvers
300 AC_MSG_RESULT($SYMVERFILE)
307 # check for cross compilation
309 AC_DEFUN([LB_LINUX_CROSS],
310 [AC_MSG_CHECKING([for cross compilation])
313 AS_IF([test "x$cross_compiling" = xno], [AC_MSG_RESULT([no])],
314 [case $host_vendor in
315 # The K1OM architecture is an extension of the x86 architecture
316 # and in MPSS 2.1 it's defined in $host_vendor. But in MPSS 3.x
317 # it's defined in $host_arch. So, try to support both case.
319 AC_MSG_RESULT([Intel(R) Xeon Phi(TM)])
320 CC_TARGET_ARCH=`$CC -v 2>&1 | grep Target: | sed -e 's/Target: //'`
321 AC_SUBST(CC_TARGET_ARCH)
322 if test \( $CC_TARGET_ARCH != x86_64-k1om-linux \
323 -a $CC_TARGET_ARCH != k1om-mpss-linux \)
325 AC_MSG_ERROR([Cross compiler not found in PATH.])
327 CROSS_VARS="ARCH=k1om CROSS_COMPILE=${CC_TARGET_ARCH}-"
328 CROSS_PATH="${CROSS_PATH:=/opt/lustre/${VERSION}/${CC_TARGET_ARCH}}"
330 # need to produce special section for debuginfo extraction
331 LDFLAGS="${LDFLAGS} -Wl,--build-id"
332 EXTRA_KLDFLAGS="${EXTRA_KLDFLAGS} -Wl,--build-id"
333 if test x$enable_server != xno ; then
334 AC_MSG_WARN([Disabling server (not supported for k1om architecture).])
339 AC_MSG_RESULT([yes, but no changes])
347 # these are like AC_TRY_COMPILE, but try to build modules against the
348 # kernel, inside the build directory
350 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
351 # --------------------------------------
352 m4_define([LB_LANG_PROGRAM],
354 #include <linux/kernel.h>
359 dnl Do *not* indent the following line: there may be CPP directives.
360 dnl Don't move the `;' right after for the same reason.
367 # LB_LINUX_COMPILE_IFELSE
369 # like AC_COMPILE_IFELSE
371 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
372 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
373 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
374 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/')
375 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="$EXTRA_LNET_INCLUDE -I$LINUX/arch/$SUBARCH/include -I$LINUX/arch/$SUBARCH/include/generated -Iinclude -I$LINUX/include -Iinclude2 -I$LINUX/include/uapi -I$LINUX/include/generated -I$LINUX/arch/$SUBARCH/include/uapi -Iarch/$SUBARCH/include/generated/uapi -I$LINUX/include/uapi -Iinclude/generated/uapi -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])],
377 [_AC_MSG_LOG_CONFTEST
378 m4_ifvaln([$5],[$5])dnl])
379 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
385 # Determine the kernel's idea of the current architecture
387 AC_DEFUN([LB_LINUX_ARCH],
388 [AC_MSG_CHECKING([Linux kernel architecture])
389 AS_IF([rm -f $PWD/build/arch
390 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
391 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $CROSS_VARS \
392 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
393 [AC_MSG_RESULT([$LINUX_ARCH])],
394 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
398 # LB_LINUX_TRY_COMPILE
400 # like AC_TRY_COMPILE
402 AC_DEFUN([LB_LINUX_TRY_COMPILE],
403 [LB_LINUX_COMPILE_IFELSE(
404 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
406 [test -s build/conftest.o],
412 # check if a given config option is defined
414 AC_DEFUN([LB_LINUX_CONFIG],[
415 AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
416 LB_LINUX_TRY_COMPILE([
417 #include <$AUTOCONF_HDIR/autoconf.h>
420 #error CONFIG_$1 not #defined
434 # check if a given config option is builtin or as module
436 AC_DEFUN([LB_LINUX_CONFIG_IM],[
437 AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
438 LB_LINUX_TRY_COMPILE([
439 #include <$AUTOCONF_HDIR/autoconf.h>
441 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
442 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
456 # like LB_LINUX_TRY_COMPILE, but with different arguments
458 AC_DEFUN([LB_LINUX_TRY_MAKE],
459 [LB_LINUX_COMPILE_IFELSE(
460 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
461 [$3], [$4], [$5], [$6]
466 # LB_CONFIG_COMPAT_RDMA
468 AC_DEFUN([LB_CONFIG_COMPAT_RDMA],
469 [AC_MSG_CHECKING([whether to use Compat RDMA])
472 AC_HELP_STRING([--with-o2ib=path],
473 [build o2iblnd against path]),
476 yes) O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
481 *) O2IBPATHS=$with_o2ib
486 O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
489 if test $ENABLEO2IB -eq 0; then
493 for O2IBPATH in $O2IBPATHS; do
494 if test \( -f ${O2IBPATH}/include/rdma/rdma_cm.h -a \
495 -f ${O2IBPATH}/include/rdma/ib_cm.h -a \
496 -f ${O2IBPATH}/include/rdma/ib_verbs.h -a \
497 -f ${O2IBPATH}/include/rdma/ib_fmr_pool.h \); then
502 compatrdma_found=false
504 if test \( -f ${O2IBPATH}/include/linux/compat-2.6.h \); then
505 compatrdma_found=true
507 AC_DEFINE(HAVE_COMPAT_RDMA, 1, [compat rdma found])
516 # LB_CONFIG_OFED_BACKPORTS
518 # include any OFED backport headers in all compile commands
519 # NOTE: this does only include the backport paths, not the OFED headers
520 # adding the OFED headers is done in the lnet portion
521 AC_DEFUN([LB_CONFIG_OFED_BACKPORTS],
522 [AC_MSG_CHECKING([whether to use any OFED backport headers])
523 if test $ENABLEO2IB -eq 0; then
526 if ! $o2ib_found; then
530 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
531 3) AC_MSG_ERROR([bad --with-o2ib path]);;
532 *) AC_MSG_ERROR([internal error]);;
535 if ! $compatrdma_found; then
536 if test -f $O2IBPATH/config.mk; then
537 . $O2IBPATH/config.mk
538 elif test -f $O2IBPATH/ofed_patch.mk; then
539 . $O2IBPATH/ofed_patch.mk
542 case $RHEL_KERNEL_VERSION in
544 EXTRA_LNET_INCLUDE="$EXTRA_LNET_INCLUDE -DCONFIG_COMPAT_RHEL_6_4";;
547 if test -n "$BACKPORT_INCLUDES"; then
548 OFED_BACKPORT_PATH="$O2IBPATH/${BACKPORT_INCLUDES/*\/kernel_addons/kernel_addons}/"
549 EXTRA_LNET_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_LNET_INCLUDE"
559 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
560 # so we test if request_module is implemented or not
561 AC_DEFUN([LC_MODULE_LOADING],
562 [AC_MSG_CHECKING([if kernel module loading is possible])
564 #include <linux/kmod.h>
566 int myretval=ENOSYS ;
569 $makerule LUSTRE_KERNEL_TEST=conftest.i
571 grep request_module build/conftest.i |dnl
572 grep -v `grep "int myretval=" build/conftest.i |dnl
573 cut -d= -f2 | cut -d" " -f1`dnl
577 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
578 [kernel module loading is possible])
582 AC_MSG_WARN([Kernel module loading support is highly recommended.])
592 AC_DEFUN([LB_PROG_LINUX],
598 LB_LINUX_CONFIG([MODULES],[],[
599 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
602 LB_LINUX_CONFIG([MODVERSIONS])
604 LB_LINUX_CONFIG([KALLSYMS],[],[
605 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
611 LB_CONFIG_COMPAT_RDMA
613 # it's ugly to be doing anything with OFED outside of the lnet module, but
614 # this has to be done here so that the backports path is set before all of
615 # the LN_PROG_LINUX checks are done
616 LB_CONFIG_OFED_BACKPORTS
620 # LB_CHECK_SYMBOL_EXPORT
621 # check symbol exported or not
623 # $2 - file(s) for find.
627 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
629 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
630 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
631 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
633 if test $rc -ne 0; then
636 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
638 if test $rc -eq 0; then
643 if test $export -eq 0; then
657 # Like AC_CHECK_HEADER but checks for a kernel-space header
659 m4_define([LB_CHECK_LINUX_HEADER],
660 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
661 AC_CACHE_CHECK([for $1], ac_Header,
662 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
664 [test -s build/conftest.o],
665 [AS_VAR_SET(ac_Header, [yes])],
666 [AS_VAR_SET(ac_Header, [no])])])
667 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
668 AS_VAR_POPDEF([ac_Header])dnl
674 # Determine if the target is a dpkg system or rpm
676 AC_DEFUN([LB_USES_DPKG],
678 AC_MSG_CHECKING([if this distro uses dpkg])
679 case `lsb_release -i -s 2>/dev/null` in