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 # get the release version of linux
40 AC_DEFUN([LB_LINUX_RELEASE],
42 rm -f build/conftest.i
43 AC_MSG_CHECKING([for Linux release])
44 if test -s $LINUX_OBJ/include/$AUTOCONF_HDIR/utsrelease.h ; then
45 LINUXRELEASEHEADER=$AUTOCONF_HDIR/utsrelease.h
47 LINUXRELEASEHEADER=$VERSION_HDIR/version.h
50 #include <$LINUXRELEASEHEADER>
53 LINUXRELEASE=UTS_RELEASE;
55 $makerule LUSTRE_KERNEL_TEST=conftest.i
57 test -s build/conftest.i
59 # LINUXRELEASE="UTS_RELEASE"
60 eval $(grep "LINUXRELEASE=" build/conftest.i)
62 AC_MSG_RESULT([unknown])
63 AC_MSG_ERROR([Could not preprocess test program. Consult config.log for details.])
65 rm -f build/conftest.i
66 if test x$LINUXRELEASE = x ; then
67 AC_MSG_RESULT([unknown])
68 AC_MSG_ERROR([Could not determine Linux release version from $LINUXRELEASEHEADER.])
70 AC_MSG_RESULT([$LINUXRELEASE])
71 AC_SUBST(LINUXRELEASE)
73 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/updates/kernel'
76 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
79 modulenetdir='$(moduledir)/net/$(PACKAGE)'
80 AC_SUBST(modulenetdir)
82 # ------------ RELEASE --------------------------------
83 AC_MSG_CHECKING([for Lustre release])
84 AC_ARG_WITH([release],
85 AC_HELP_STRING([--with-release=string],
86 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
89 if test -n "$DOWNSTREAM_RELEASE"; then
90 RELEASE="${DOWNSTREAM_RELEASE}_"
92 RELEASE="$RELEASE`echo ${LINUXRELEASE} | tr '-' '_'`_$BUILDID")
93 AC_MSG_RESULT($RELEASE)
96 # check is redhat/suse kernels
97 AC_MSG_CHECKING([for RedHat kernel version])
98 AS_IF([fgrep -q RHEL_RELEASE ${LINUX_OBJ}/include/linux/version.h], [
100 RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
101 ${LINUX_OBJ}/include/linux/version.h) + 1)
102 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< ${LINUXRELEASE})
103 RHEL_KERNEL_VERSION=${KERNEL_VERSION}-${RHEL_RELEASE}
104 AC_SUBST(RHEL_KERNEL_VERSION)
105 AC_MSG_RESULT([${RHEL_KERNEL_VERSION}])
107 AC_MSG_RESULT([not found])
108 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
112 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
113 AC_DEFUN([LB_ARG_REPLACE_PATH],[
115 eval "set x $ac_configure_args"
123 arg=$(printf %s\n ["$arg"] | \
124 sed "s/'/'\\\\\\\\''/g")
127 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
128 new_configure_args="$new_configure_args \"$arg\""
130 ac_configure_args=$new_configure_args
133 # this is the work-horse of the next function
134 AC_DEFUN([__LB_ARG_CANON_PATH], [
135 [$3]=$(readlink -f $with_$2)
136 LB_ARG_REPLACE_PATH([$1], $[$3])
139 # a front-end for the above function that transforms - and . in the
140 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
141 AC_DEFUN([LB_ARG_CANON_PATH], [
142 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
149 # Find paths for linux, handling kernel-source rpms
151 AC_DEFUN([LB_LINUX_PATH],
152 [# prep some default values
153 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
154 if readlink -q -e $DEFAULT_LINUX; then
158 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
159 PATHS="/lib/modules/$(uname -r)/build"
161 PATHS+=" $DEFAULT_LINUX"
162 for DEFAULT_LINUX_OBJ in $PATHS; do
163 if readlink -q -e $DEFAULT_LINUX_OBJ; then
167 AC_MSG_CHECKING([for Linux sources])
169 AC_HELP_STRING([--with-linux=path],
170 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
171 [LB_ARG_CANON_PATH([linux], [LINUX])
172 DEFAULT_LINUX_OBJ=$LINUX],
173 [LINUX=$DEFAULT_LINUX])
174 AC_MSG_RESULT([$LINUX])
177 # -------- check for linux --------
178 LB_CHECK_FILE([$LINUX],[],
179 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
181 # -------- linux objects (for 2.6) --
182 AC_MSG_CHECKING([for Linux objects dir])
183 AC_ARG_WITH([linux-obj],
184 AC_HELP_STRING([--with-linux-obj=path],
185 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
186 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
187 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
189 AC_MSG_RESULT([$LINUX_OBJ])
192 # -------- check for .config --------
193 AC_ARG_WITH([linux-config],
194 [AC_HELP_STRING([--with-linux-config=path],
195 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
196 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
197 [LINUX_CONFIG=$LINUX_OBJ/.config])
198 AC_SUBST(LINUX_CONFIG)
200 LB_CHECK_FILE([/boot/kernel.h],
201 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
202 [LB_CHECK_FILE([/var/adm/running-kernel.h],
203 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
205 AC_ARG_WITH([kernel-source-header],
206 AC_HELP_STRING([--with-kernel-source-header=path],
207 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
208 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
210 # ------------ .config exists ----------------
211 LB_CHECK_FILE([$LINUX_CONFIG],[],
212 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
214 # ----------- make dep run? ------------------
215 # at 2.6.19 # $LINUX/include/linux/config.h is removed
216 # and at more old has only one line
217 # include <autoconf.h>
218 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated],
219 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
220 [AC_MSG_ERROR([Run make config in $LINUX.])])])
221 AC_SUBST(AUTOCONF_HDIR)
222 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h], [VERSION_HDIR=linux],
223 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
224 [VERSION_HDIR=generated/uapi/linux],
225 [AC_MSG_ERROR([Run make config in $LINUX.])])
227 AC_SUBST(VERSION_HDIR)
229 # ----------- kconfig.h exists ---------------
230 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
231 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
232 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
233 [CONFIG_INCLUDE=include/linux/kconfig.h],
234 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
235 AC_SUBST(CONFIG_INCLUDE)
237 # ------------ rhconfig.h includes runtime-generated bits --
238 # red hat kernel-source checks
240 # we know this exists after the check above. if the user
241 # tarred up the tree and ran make dep etc. in it, then
242 # version.h gets overwritten with a standard linux one.
244 if grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null ; then
245 # This is a clean kernel-source tree, we need to
246 # enable extensive workarounds to get this to build
248 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
249 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
250 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
251 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
252 AC_MSG_WARN([Consult build/README.kernel-source for details.])
254 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
255 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
258 # this is needed before we can build modules
262 # --- check that we can build modules at all
263 AC_MSG_CHECKING([that modules can be built at all])
264 LB_LINUX_TRY_COMPILE([],[],[
268 AC_MSG_WARN([Consult config.log for details.])
269 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
270 AC_MSG_ERROR([Kernel modules cannot be built.])
274 ]) # end of LB_LINUX_PATH
276 # LB_LINUX_SYMVERFILE
277 # SLES 9 uses a different name for this file - unsure about vanilla kernels
278 # around this version, but it matters for servers only.
279 AC_DEFUN([LB_LINUX_SYMVERFILE],
280 [AC_MSG_CHECKING([name of module symbol version file])
281 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
282 SYMVERFILE=Modules.symvers
284 SYMVERFILE=Module.symvers
286 AC_MSG_RESULT($SYMVERFILE)
293 # check for cross compilation
295 AC_DEFUN([LB_LINUX_CROSS],
296 [AC_MSG_CHECKING([for cross compilation])
299 AS_IF([test "x$cross_compiling" = xno], [AC_MSG_RESULT([no])],
300 [case $host_vendor in
301 # The K1OM architecture is an extension of the x86 architecture.
302 # So, the $host_arch is x86_64.
304 AC_MSG_RESULT([Intel(R) Xeon Phi(TM)])
305 CC_TARGET_ARCH=`$CC -v 2>&1 | grep Target: | sed -e 's/Target: //'`
306 if test $CC_TARGET_ARCH != x86_64-$host_vendor-linux ; then
307 AC_MSG_ERROR([Cross compiler not found in PATH.])
309 CROSS_VARS="ARCH=$host_vendor CROSS_COMPILE=x86_64-$host_vendor-linux-"
310 CROSS_PATH=${CROSS_PATH:=/opt/intel/mic/lustre/device-k1om}
312 # need to produce special section for debuginfo extraction
313 LDFLAGS="${LDFLAGS} -Wl,--build-id"
314 EXTRA_KLDFLAGS="${EXTRA_KLDFLAGS} -Wl,--build-id"
315 if test x$enable_server = xyes ; then
316 AC_MSG_WARN([Disabling server (not supported for x86_64-$host_vendor-linux).])
321 AC_MSG_RESULT([yes, but no changes])
329 # these are like AC_TRY_COMPILE, but try to build modules against the
330 # kernel, inside the build directory
332 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
333 # --------------------------------------
334 m4_define([LB_LANG_PROGRAM],
336 #include <linux/kernel.h>
341 dnl Do *not* indent the following line: there may be CPP directives.
342 dnl Don't move the `;' right after for the same reason.
349 # LB_LINUX_COMPILE_IFELSE
351 # like AC_COMPILE_IFELSE
353 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
354 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
355 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
356 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/')
357 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])],
359 [_AC_MSG_LOG_CONFTEST
360 m4_ifvaln([$5],[$5])dnl])
361 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
367 # Determine the kernel's idea of the current architecture
369 AC_DEFUN([LB_LINUX_ARCH],
370 [AC_MSG_CHECKING([Linux kernel architecture])
371 AS_IF([rm -f $PWD/build/arch
372 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
373 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $CROSS_VARS \
374 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
375 [AC_MSG_RESULT([$LINUX_ARCH])],
376 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
380 # LB_LINUX_TRY_COMPILE
382 # like AC_TRY_COMPILE
384 AC_DEFUN([LB_LINUX_TRY_COMPILE],
385 [LB_LINUX_COMPILE_IFELSE(
386 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
388 [test -s build/conftest.o],
394 # check if a given config option is defined
396 AC_DEFUN([LB_LINUX_CONFIG],[
397 AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
398 LB_LINUX_TRY_COMPILE([
399 #include <$AUTOCONF_HDIR/autoconf.h>
402 #error CONFIG_$1 not #defined
416 # check if a given config option is builtin or as module
418 AC_DEFUN([LB_LINUX_CONFIG_IM],[
419 AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
420 LB_LINUX_TRY_COMPILE([
421 #include <$AUTOCONF_HDIR/autoconf.h>
423 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
424 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
438 # like LB_LINUX_TRY_COMPILE, but with different arguments
440 AC_DEFUN([LB_LINUX_TRY_MAKE],
441 [LB_LINUX_COMPILE_IFELSE(
442 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
443 [$3], [$4], [$5], [$6]
448 # LB_CONFIG_COMPAT_RDMA
450 AC_DEFUN([LB_CONFIG_COMPAT_RDMA],
451 [AC_MSG_CHECKING([whether to use Compat RDMA])
454 AC_HELP_STRING([--with-o2ib=path],
455 [build o2iblnd against path]),
458 yes) O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
463 *) O2IBPATHS=$with_o2ib
468 O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
471 if test $ENABLEO2IB -eq 0; then
475 for O2IBPATH in $O2IBPATHS; do
476 if test \( -f ${O2IBPATH}/include/rdma/rdma_cm.h -a \
477 -f ${O2IBPATH}/include/rdma/ib_cm.h -a \
478 -f ${O2IBPATH}/include/rdma/ib_verbs.h -a \
479 -f ${O2IBPATH}/include/rdma/ib_fmr_pool.h \); then
484 compatrdma_found=false
486 if test \( -f ${O2IBPATH}/include/linux/compat-2.6.h \); then
487 compatrdma_found=true
489 AC_DEFINE(HAVE_COMPAT_RDMA, 1, [compat rdma found])
498 # LB_CONFIG_OFED_BACKPORTS
500 # include any OFED backport headers in all compile commands
501 # NOTE: this does only include the backport paths, not the OFED headers
502 # adding the OFED headers is done in the lnet portion
503 AC_DEFUN([LB_CONFIG_OFED_BACKPORTS],
504 [AC_MSG_CHECKING([whether to use any OFED backport headers])
505 if test $ENABLEO2IB -eq 0; then
508 if ! $o2ib_found; then
512 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
513 3) AC_MSG_ERROR([bad --with-o2ib path]);;
514 *) AC_MSG_ERROR([internal error]);;
517 if ! $compatrdma_found; then
518 if test -f $O2IBPATH/config.mk; then
519 . $O2IBPATH/config.mk
520 elif test -f $O2IBPATH/ofed_patch.mk; then
521 . $O2IBPATH/ofed_patch.mk
524 case $RHEL_KERNEL_VERSION in
526 EXTRA_LNET_INCLUDE="$EXTRA_LNET_INCLUDE -DCONFIG_COMPAT_RHEL_6_4";;
529 if test -n "$BACKPORT_INCLUDES"; then
530 OFED_BACKPORT_PATH="$O2IBPATH/${BACKPORT_INCLUDES/*\/kernel_addons/kernel_addons}/"
531 EXTRA_LNET_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_LNET_INCLUDE"
541 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
542 # so we test if request_module is implemented or not
543 AC_DEFUN([LC_MODULE_LOADING],
544 [AC_MSG_CHECKING([if kernel module loading is possible])
546 #include <linux/kmod.h>
548 int myretval=ENOSYS ;
551 $makerule LUSTRE_KERNEL_TEST=conftest.i
553 grep request_module build/conftest.i |dnl
554 grep -v `grep "int myretval=" build/conftest.i |dnl
555 cut -d= -f2 | cut -d" " -f1`dnl
559 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
560 [kernel module loading is possible])
564 AC_MSG_WARN([Kernel module loading support is highly recommended.])
574 AC_DEFUN([LB_PROG_LINUX],
580 LB_LINUX_CONFIG([MODULES],[],[
581 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
584 LB_LINUX_CONFIG([MODVERSIONS])
586 LB_LINUX_CONFIG([KALLSYMS],[],[
587 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
593 LB_CONFIG_COMPAT_RDMA
595 # it's ugly to be doing anything with OFED outside of the lnet module, but
596 # this has to be done here so that the backports path is set before all of
597 # the LN_PROG_LINUX checks are done
598 LB_CONFIG_OFED_BACKPORTS
602 # LB_CHECK_SYMBOL_EXPORT
603 # check symbol exported or not
605 # $2 - file(s) for find.
609 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
611 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
612 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
613 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
615 if test $rc -ne 0; then
618 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
620 if test $rc -eq 0; then
625 if test $export -eq 0; then
639 # Like AC_CHECK_HEADER but checks for a kernel-space header
641 m4_define([LB_CHECK_LINUX_HEADER],
642 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
643 AC_CACHE_CHECK([for $1], ac_Header,
644 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
646 [test -s build/conftest.o],
647 [AS_VAR_SET(ac_Header, [yes])],
648 [AS_VAR_SET(ac_Header, [no])])])
649 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
650 AS_VAR_POPDEF([ac_Header])dnl
656 # Determine if the target is a dpkg system or rpm
658 AC_DEFUN([LB_USES_DPKG],
660 AC_MSG_CHECKING([if this distro uses dpkg])
661 case `lsb_release -i -s 2>/dev/null` in