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($RELEASE)
96 # check is redhat/suse kernels
97 AC_MSG_CHECKING([that RedHat kernel])
98 LB_LINUX_TRY_COMPILE([
99 #include <$VERSION_HDIR/version.h>
101 #ifndef RHEL_RELEASE_CODE
102 #error "not redhat kernel"
111 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
115 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
116 AC_DEFUN([LB_ARG_REPLACE_PATH],[
118 eval "set x $ac_configure_args"
126 arg=$(printf %s\n ["$arg"] | \
127 sed "s/'/'\\\\\\\\''/g")
130 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
131 new_configure_args="$new_configure_args \"$arg\""
133 ac_configure_args=$new_configure_args
136 # this is the work-horse of the next function
137 AC_DEFUN([__LB_ARG_CANON_PATH], [
138 [$3]=$(readlink -f $with_$2)
139 LB_ARG_REPLACE_PATH([$1], $[$3])
142 # a front-end for the above function that transforms - and . in the
143 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
144 AC_DEFUN([LB_ARG_CANON_PATH], [
145 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
152 # Find paths for linux, handling kernel-source rpms
154 AC_DEFUN([LB_LINUX_PATH],
155 [# prep some default values
156 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
157 if readlink -q -e $DEFAULT_LINUX; then
161 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
162 PATHS="/lib/modules/$(uname -r)/build"
164 PATHS+=" $DEFAULT_LINUX"
165 for DEFAULT_LINUX_OBJ in $PATHS; do
166 if readlink -q -e $DEFAULT_LINUX_OBJ; then
170 AC_MSG_CHECKING([for Linux sources])
172 AC_HELP_STRING([--with-linux=path],
173 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
174 [LB_ARG_CANON_PATH([linux], [LINUX])
175 DEFAULT_LINUX_OBJ=$LINUX],
176 [LINUX=$DEFAULT_LINUX])
177 AC_MSG_RESULT([$LINUX])
180 # -------- check for linux --------
181 LB_CHECK_FILE([$LINUX],[],
182 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
184 # -------- linux objects (for 2.6) --
185 AC_MSG_CHECKING([for Linux objects dir])
186 AC_ARG_WITH([linux-obj],
187 AC_HELP_STRING([--with-linux-obj=path],
188 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
189 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
190 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
192 AC_MSG_RESULT([$LINUX_OBJ])
195 # -------- check for .config --------
196 AC_ARG_WITH([linux-config],
197 [AC_HELP_STRING([--with-linux-config=path],
198 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
199 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
200 [LINUX_CONFIG=$LINUX_OBJ/.config])
201 AC_SUBST(LINUX_CONFIG)
203 LB_CHECK_FILE([/boot/kernel.h],
204 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
205 [LB_CHECK_FILE([/var/adm/running-kernel.h],
206 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
208 AC_ARG_WITH([kernel-source-header],
209 AC_HELP_STRING([--with-kernel-source-header=path],
210 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
211 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
213 # ------------ .config exists ----------------
214 LB_CHECK_FILE([$LINUX_CONFIG],[],
215 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
217 # ----------- make dep run? ------------------
218 # at 2.6.19 # $LINUX/include/linux/config.h is removed
219 # and at more old has only one line
220 # include <autoconf.h>
221 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated],
222 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
223 [AC_MSG_ERROR([Run make config in $LINUX.])])])
224 AC_SUBST(AUTOCONF_HDIR)
225 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h], [VERSION_HDIR=linux],
226 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
227 [VERSION_HDIR=generated/uapi/linux],
228 [AC_MSG_ERROR([Run make config in $LINUX.])])
230 AC_SUBST(VERSION_HDIR)
232 # ----------- kconfig.h exists ---------------
233 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
234 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
235 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
236 [CONFIG_INCLUDE=include/linux/kconfig.h],
237 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
238 AC_SUBST(CONFIG_INCLUDE)
240 # ------------ rhconfig.h includes runtime-generated bits --
241 # red hat kernel-source checks
243 # we know this exists after the check above. if the user
244 # tarred up the tree and ran make dep etc. in it, then
245 # version.h gets overwritten with a standard linux one.
247 if grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null ; then
248 # This is a clean kernel-source tree, we need to
249 # enable extensive workarounds to get this to build
251 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
252 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
253 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
254 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
255 AC_MSG_WARN([Consult build/README.kernel-source for details.])
257 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
258 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
261 # this is needed before we can build modules
265 # --- check that we can build modules at all
266 AC_MSG_CHECKING([that modules can be built at all])
267 LB_LINUX_TRY_COMPILE([],[],[
271 AC_MSG_WARN([Consult config.log for details.])
272 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
273 AC_MSG_ERROR([Kernel modules cannot be built.])
277 ]) # end of LB_LINUX_PATH
279 # LB_LINUX_SYMVERFILE
280 # SLES 9 uses a different name for this file - unsure about vanilla kernels
281 # around this version, but it matters for servers only.
282 AC_DEFUN([LB_LINUX_SYMVERFILE],
283 [AC_MSG_CHECKING([name of module symbol version file])
284 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
285 SYMVERFILE=Modules.symvers
287 SYMVERFILE=Module.symvers
289 AC_MSG_RESULT($SYMVERFILE)
296 # check for cross compilation
298 AC_DEFUN([LB_LINUX_CROSS],
299 [AC_MSG_CHECKING([for cross compilation])
302 AS_IF([test "x$cross_compiling" = xno], [AC_MSG_RESULT([no])],
303 [case $host_vendor in
304 # The K1OM architecture is an extension of the x86 architecture.
305 # So, the $host_arch is x86_64.
307 AC_MSG_RESULT([Intel(R) Xeon Phi(TM)])
308 CC_TARGET_ARCH=`$CC -v 2>&1 | grep Target: | sed -e 's/Target: //'`
309 if test $CC_TARGET_ARCH != x86_64-$host_vendor-linux ; then
310 AC_MSG_ERROR([Cross compiler not found in PATH.])
312 CROSS_VARS="ARCH=$host_vendor CROSS_COMPILE=x86_64-$host_vendor-linux-"
313 CROSS_PATH=${CROSS_PATH:=/opt/intel/mic/lustre/device-k1om}
315 # need to produce special section for debuginfo extraction
316 LDFLAGS="${LDFLAGS} -Wl,--build-id"
317 EXTRA_KLDFLAGS="${EXTRA_KLDFLAGS} -Wl,--build-id"
318 if test x$enable_server = xyes ; then
319 AC_MSG_WARN([Disabling server (not supported for x86_64-$host_vendor-linux).])
324 AC_MSG_RESULT([yes, but no changes])
332 # these are like AC_TRY_COMPILE, but try to build modules against the
333 # kernel, inside the build directory
335 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
336 # --------------------------------------
337 m4_define([LB_LANG_PROGRAM],
339 #include <linux/kernel.h>
344 dnl Do *not* indent the following line: there may be CPP directives.
345 dnl Don't move the `;' right after for the same reason.
352 # LB_LINUX_COMPILE_IFELSE
354 # like AC_COMPILE_IFELSE
356 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
357 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
358 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
359 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/')
360 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])],
362 [_AC_MSG_LOG_CONFTEST
363 m4_ifvaln([$5],[$5])dnl])
364 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
370 # Determine the kernel's idea of the current architecture
372 AC_DEFUN([LB_LINUX_ARCH],
373 [AC_MSG_CHECKING([Linux kernel architecture])
374 AS_IF([rm -f $PWD/build/arch
375 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
376 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $CROSS_VARS \
377 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
378 [AC_MSG_RESULT([$LINUX_ARCH])],
379 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
383 # LB_LINUX_TRY_COMPILE
385 # like AC_TRY_COMPILE
387 AC_DEFUN([LB_LINUX_TRY_COMPILE],
388 [LB_LINUX_COMPILE_IFELSE(
389 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
391 [test -s build/conftest.o],
397 # check if a given config option is defined
399 AC_DEFUN([LB_LINUX_CONFIG],[
400 AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
401 LB_LINUX_TRY_COMPILE([
402 #include <$AUTOCONF_HDIR/autoconf.h>
405 #error CONFIG_$1 not #defined
419 # check if a given config option is builtin or as module
421 AC_DEFUN([LB_LINUX_CONFIG_IM],[
422 AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
423 LB_LINUX_TRY_COMPILE([
424 #include <$AUTOCONF_HDIR/autoconf.h>
426 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
427 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
441 # like LB_LINUX_TRY_COMPILE, but with different arguments
443 AC_DEFUN([LB_LINUX_TRY_MAKE],
444 [LB_LINUX_COMPILE_IFELSE(
445 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
446 [$3], [$4], [$5], [$6]
451 # LB_CONFIG_COMPAT_RDMA
453 AC_DEFUN([LB_CONFIG_COMPAT_RDMA],
454 [AC_MSG_CHECKING([whether to use Compat RDMA])
457 AC_HELP_STRING([--with-o2ib=path],
458 [build o2iblnd against path]),
461 yes) O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
466 *) O2IBPATHS=$with_o2ib
471 O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
474 if test $ENABLEO2IB -eq 0; then
478 for O2IBPATH in $O2IBPATHS; do
479 if test \( -f ${O2IBPATH}/include/rdma/rdma_cm.h -a \
480 -f ${O2IBPATH}/include/rdma/ib_cm.h -a \
481 -f ${O2IBPATH}/include/rdma/ib_verbs.h -a \
482 -f ${O2IBPATH}/include/rdma/ib_fmr_pool.h \); then
487 compatrdma_found=false
489 if test \( -f ${O2IBPATH}/include/linux/compat-2.6.h \); then
490 compatrdma_found=true
492 AC_DEFINE(HAVE_COMPAT_RDMA, 1, [compat rdma found])
501 # LB_CONFIG_OFED_BACKPORTS
503 # include any OFED backport headers in all compile commands
504 # NOTE: this does only include the backport paths, not the OFED headers
505 # adding the OFED headers is done in the lnet portion
506 AC_DEFUN([LB_CONFIG_OFED_BACKPORTS],
507 [AC_MSG_CHECKING([whether to use any OFED backport headers])
508 if test $ENABLEO2IB -eq 0; then
511 if ! $o2ib_found; then
515 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
516 3) AC_MSG_ERROR([bad --with-o2ib path]);;
517 *) AC_MSG_ERROR([internal error]);;
520 if ! $compatrdma_found; then
521 if test -f $O2IBPATH/config.mk; then
522 . $O2IBPATH/config.mk
523 elif test -f $O2IBPATH/ofed_patch.mk; then
524 . $O2IBPATH/ofed_patch.mk
527 if test -n "$BACKPORT_INCLUDES"; then
528 OFED_BACKPORT_PATH="$O2IBPATH/${BACKPORT_INCLUDES/*\/kernel_addons/kernel_addons}/"
529 EXTRA_LNET_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_LNET_INCLUDE"
539 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
540 # so we test if request_module is implemented or not
541 AC_DEFUN([LC_MODULE_LOADING],
542 [AC_MSG_CHECKING([if kernel module loading is possible])
544 #include <linux/kmod.h>
546 int myretval=ENOSYS ;
549 $makerule LUSTRE_KERNEL_TEST=conftest.i
551 grep request_module build/conftest.i |dnl
552 grep -v `grep "int myretval=" build/conftest.i |dnl
553 cut -d= -f2 | cut -d" " -f1`dnl
557 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
558 [kernel module loading is possible])
562 AC_MSG_WARN([Kernel module loading support is highly recommended.])
572 AC_DEFUN([LB_PROG_LINUX],
578 LB_LINUX_CONFIG([MODULES],[],[
579 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
582 LB_LINUX_CONFIG([MODVERSIONS])
584 LB_LINUX_CONFIG([KALLSYMS],[],[
585 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
591 LB_CONFIG_COMPAT_RDMA
593 # it's ugly to be doing anything with OFED outside of the lnet module, but
594 # this has to be done here so that the backports path is set before all of
595 # the LN_PROG_LINUX checks are done
596 LB_CONFIG_OFED_BACKPORTS
600 # LB_CHECK_SYMBOL_EXPORT
601 # check symbol exported or not
603 # $2 - file(s) for find.
607 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
609 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
610 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
611 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
613 if test $rc -ne 0; then
616 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
618 if test $rc -eq 0; then
623 if test $export -eq 0; then
637 # Like AC_CHECK_HEADER but checks for a kernel-space header
639 m4_define([LB_CHECK_LINUX_HEADER],
640 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
641 AC_CACHE_CHECK([for $1], ac_Header,
642 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
644 [test -s build/conftest.o],
645 [AS_VAR_SET(ac_Header, [yes])],
646 [AS_VAR_SET(ac_Header, [no])])])
647 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
648 AS_VAR_POPDEF([ac_Header])dnl
654 # Determine if the target is a dpkg system or rpm
656 AC_DEFUN([LB_USES_DPKG],
658 AC_MSG_CHECKING([if this distro uses dpkg])
659 case `lsb_release -i -s 2>/dev/null` in