4 # Set things accordingly for a 2.5 kernel
6 AC_DEFUN([LB_LINUX_VERSION],
7 [LB_CHECK_FILE([$LINUX/include/linux/namei.h],
15 AC_MSG_CHECKING([if you are using Linux 2.6])
16 AC_MSG_RESULT([$linux25])
18 MODULE_TARGET="SUBDIRS"
19 if test $linux25 = "yes" ; then
21 AC_MSG_CHECKING([for external module build support])
22 rm -f build/conftest.i
23 LB_LINUX_TRY_MAKE([],[],
24 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
25 [test -s build/conftest.i],
29 makerule="_module_$makerule"
31 LB_LINUX_TRY_MAKE([],[],
32 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
33 [test -s build/conftest.i],
37 AC_MSG_ERROR([unknown; check config.log for details])
41 makerule="_dir_$PWD/build"
44 AC_SUBST(MODULE_TARGET)
52 # get the release version of linux
54 AC_DEFUN([LB_LINUX_RELEASE],
56 rm -f build/conftest.i
57 AC_MSG_CHECKING([for Linux release])
58 if test -s $LINUX_OBJ/include/$AUTOCONF_HDIR/utsrelease.h ; then
59 LINUXRELEASEHEADER=$AUTOCONF_HDIR/utsrelease.h
61 LINUXRELEASEHEADER=linux/version.h
64 #include <$LINUXRELEASEHEADER>
67 LINUXRELEASE=UTS_RELEASE;
69 $makerule LUSTRE_KERNEL_TEST=conftest.i
71 test -s build/conftest.i
73 # LINUXRELEASE="UTS_RELEASE"
74 eval $(grep "LINUXRELEASE=" build/conftest.i)
76 AC_MSG_RESULT([unknown])
77 AC_MSG_ERROR([Could not preprocess test program. Consult config.log for details.])
79 rm -f build/conftest.i
80 if test x$LINUXRELEASE = x ; then
81 AC_MSG_RESULT([unknown])
82 AC_MSG_ERROR([Could not determine Linux release version from linux/version.h.])
84 AC_MSG_RESULT([$LINUXRELEASE])
85 AC_SUBST(LINUXRELEASE)
87 moduledir='/lib/modules/'$LINUXRELEASE/updates/kernel
90 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
93 modulenetdir='$(moduledir)/net/$(PACKAGE)'
94 AC_SUBST(modulenetdir)
96 # ------------ RELEASE --------------------------------
97 AC_MSG_CHECKING([for Lustre release])
98 AC_ARG_WITH([release],
99 AC_HELP_STRING([--with-release=string],
100 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
103 if test -n "$DOWNSTREAM_RELEASE"; then
104 RELEASE="${DOWNSTREAM_RELEASE}_"
106 RELEASE="$RELEASE`echo ${LINUXRELEASE} | tr '-' '_'`_$BUILDID")
107 AC_MSG_RESULT($RELEASE)
110 # check is redhat/suse kernels
111 AC_MSG_CHECKING([that RedHat kernel])
112 LB_LINUX_TRY_COMPILE([
113 #include <linux/version.h>
115 #ifndef RHEL_RELEASE_CODE
116 #error "not redhat kernel"
125 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
129 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
130 AC_DEFUN([LB_ARG_REPLACE_PATH],[
132 eval "set x $ac_configure_args"
140 arg=$(printf %s\n ["$arg"] | \
141 sed "s/'/'\\\\\\\\''/g")
144 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
145 new_configure_args="$new_configure_args \"$arg\""
147 ac_configure_args=$new_configure_args
150 # this is the work-horse of the next function
151 AC_DEFUN([__LB_ARG_CANON_PATH], [
152 [$3]=$(readlink -f $with_$2)
153 LB_ARG_REPLACE_PATH([$1], $[$3])
156 # a front-end for the above function that transforms - and . in the
157 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
158 AC_DEFUN([LB_ARG_CANON_PATH], [
159 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
166 # Find paths for linux, handling kernel-source rpms
168 AC_DEFUN([LB_LINUX_PATH],
169 [# prep some default values
170 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
171 if readlink -q -e $DEFAULT_LINUX; then
175 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
176 PATHS="/lib/modules/$(uname -r)/build"
178 PATHS+=" $DEFAULT_LINUX"
179 for DEFAULT_LINUX_OBJ in $PATHS; do
180 if readlink -q -e $DEFAULT_LINUX_OBJ; then
184 AC_MSG_CHECKING([for Linux sources])
186 AC_HELP_STRING([--with-linux=path],
187 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
188 [LB_ARG_CANON_PATH([linux], [LINUX])
189 DEFAULT_LINUX_OBJ=$LINUX],
190 [LINUX=$DEFAULT_LINUX])
191 AC_MSG_RESULT([$LINUX])
194 # -------- check for linux --------
195 LB_CHECK_FILE([$LINUX],[],
196 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
198 # -------- linux objects (for 2.6) --
199 AC_MSG_CHECKING([for Linux objects dir])
200 AC_ARG_WITH([linux-obj],
201 AC_HELP_STRING([--with-linux-obj=path],
202 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
203 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
204 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
206 AC_MSG_RESULT([$LINUX_OBJ])
209 # -------- check for .config --------
210 AC_ARG_WITH([linux-config],
211 [AC_HELP_STRING([--with-linux-config=path],
212 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
213 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
214 [LINUX_CONFIG=$LINUX_OBJ/.config])
215 AC_SUBST(LINUX_CONFIG)
217 LB_CHECK_FILE([/boot/kernel.h],
218 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
219 [LB_CHECK_FILE([/var/adm/running-kernel.h],
220 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
222 AC_ARG_WITH([kernel-source-header],
223 AC_HELP_STRING([--with-kernel-source-header=path],
224 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
225 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
227 # ------------ .config exists ----------------
228 LB_CHECK_FILE([$LINUX_CONFIG],[],
229 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
231 # ----------- make dep run? ------------------
232 # at 2.6.19 # $LINUX/include/linux/config.h is removed
233 # and at more old has only one line
234 # include <autoconf.h>
235 LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
236 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated
237 AC_DEFINE(AUTOCONF_INCLUDED, 1, [autoconf.h not define it while move to generated])],
238 [AC_MSG_ERROR([Run make config in $LINUX.])])])
239 AC_SUBST(AUTOCONF_HDIR)
240 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],[],
241 [AC_MSG_ERROR([Run make config in $LINUX.])])
243 # ------------ rhconfig.h includes runtime-generated bits --
244 # red hat kernel-source checks
246 # we know this exists after the check above. if the user
247 # tarred up the tree and ran make dep etc. in it, then
248 # version.h gets overwritten with a standard linux one.
250 if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then
251 # This is a clean kernel-source tree, we need to
252 # enable extensive workarounds to get this to build
254 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
255 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
256 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
257 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
258 AC_MSG_WARN([Consult build/README.kernel-source for details.])
260 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
261 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
264 # this is needed before we can build modules
268 # --- check that we can build modules at all
269 AC_MSG_CHECKING([that modules can be built at all])
270 LB_LINUX_TRY_COMPILE([],[],[
274 AC_MSG_WARN([Consult config.log for details.])
275 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
276 AC_MSG_ERROR([Kernel modules cannot be built.])
280 ]) # end of LB_LINUX_PATH
282 # LB_LINUX_SYMVERFILE
283 # SLES 9 uses a different name for this file - unsure about vanilla kernels
284 # around this version, but it matters for servers only.
285 AC_DEFUN([LB_LINUX_SYMVERFILE],
286 [AC_MSG_CHECKING([name of module symbol version file])
287 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
288 SYMVERFILE=Modules.symvers
290 SYMVERFILE=Module.symvers
292 AC_MSG_RESULT($SYMVERFILE)
300 # Find modpost and check it
302 AC_DEFUN([LB_LINUX_MODPOST],
304 # Find the modpost utility
305 LB_CHECK_FILE([$LINUX_OBJ/scripts/mod/modpost],
306 [MODPOST=$LINUX_OBJ/scripts/mod/modpost],
307 [LB_CHECK_FILE([$LINUX_OBJ/scripts/modpost],
308 [MODPOST=$LINUX_OBJ/scripts/modpost],
309 AC_MSG_ERROR([modpost not found.])
315 AC_MSG_CHECKING([if modpost can be run])
319 AC_MSG_ERROR([modpost can not be run.])
322 # Check if modpost supports (and therefore requires) -m
323 AC_MSG_CHECKING([if modpost supports -m])
324 if $MODPOST -m 2>/dev/null ; then
331 AC_SUBST(MODPOST_ARGS)
337 # check for a uml kernel
339 AC_DEFUN([LB_LINUX_UML],
343 AC_MSG_CHECKING([if you are running user mode linux for $target_cpu])
344 if test -e $LINUX/include/asm-um ; then
345 if test X`ls -id $LINUX/include/asm/ 2>/dev/null | awk '{print [$]1}'` = X`ls -id $LINUX/include/asm-um 2>/dev/null | awk '{print [$]1}'` ; then
347 # see notes in Rules.in
354 AC_MSG_RESULT([no (asm-um missing)])
360 # these are like AC_TRY_COMPILE, but try to build modules against the
361 # kernel, inside the build directory
363 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
364 # --------------------------------------
365 m4_define([LB_LANG_PROGRAM],
367 #include <linux/kernel.h>
372 dnl Do *not* indent the following line: there may be CPP directives.
373 dnl Don't move the `;' right after for the same reason.
380 # LB_LINUX_COMPILE_IFELSE
382 # like AC_COMPILE_IFELSE
384 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
385 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
386 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
387 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/`uname -m|sed -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/'`/include -I$LINUX_OBJ/include -I$LINUX/include -I$LINUX_OBJ/include2 -include include/$AUTOCONF_HDIR/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
389 [_AC_MSG_LOG_CONFTEST
390 m4_ifvaln([$5],[$5])dnl])
391 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
397 # Determine the kernel's idea of the current architecture
399 AC_DEFUN([LB_LINUX_ARCH],
400 [AC_MSG_CHECKING([Linux kernel architecture])
401 AS_IF([rm -f $PWD/build/arch
402 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
403 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $ARCH_UM \
404 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
405 [AC_MSG_RESULT([$LINUX_ARCH])],
406 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
410 # LB_LINUX_TRY_COMPILE
412 # like AC_TRY_COMPILE
414 AC_DEFUN([LB_LINUX_TRY_COMPILE],
415 [LB_LINUX_COMPILE_IFELSE(
416 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
418 [test -s build/conftest.o],
424 # check if a given config option is defined
426 AC_DEFUN([LB_LINUX_CONFIG],
427 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
428 LB_LINUX_TRY_COMPILE([
429 #include <$AUTOCONF_HDIR/autoconf.h>
432 #error CONFIG_$1 not #defined
446 # check if a given config option is builtin or as module
448 AC_DEFUN([LB_LINUX_CONFIG_IM],
449 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
450 LB_LINUX_TRY_COMPILE([
451 #include <$AUTOCONF_HDIR/autoconf.h>
453 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
454 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
468 # like LB_LINUX_TRY_COMPILE, but with different arguments
470 AC_DEFUN([LB_LINUX_TRY_MAKE],
471 [LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [$3], [$4], [$5], [$6])])
474 # LB_LINUX_CONFIG_BIG_STACK
476 # check for big stack patch
478 AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK],
479 [if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then
482 LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[
483 LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[
484 LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[
485 AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.])
495 # LB_CONFIG_OFED_BACKPORTS
497 # include any OFED backport headers in all compile commands
498 # NOTE: this does only include the backport paths, not the OFED headers
499 # adding the OFED headers is done in the lnet portion
500 AC_DEFUN([LB_CONFIG_OFED_BACKPORTS],
501 [AC_MSG_CHECKING([whether to use any OFED backport headers])
504 AC_HELP_STRING([--with-o2ib=path],
505 [build o2iblnd against path]),
508 yes) O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
513 *) O2IBPATHS=$with_o2ib
518 O2IBPATHS="$LINUX $LINUX/drivers/infiniband"
521 if test $ENABLEO2IB -eq 0; then
525 for O2IBPATH in $O2IBPATHS; do
526 if test \( -f ${O2IBPATH}/include/rdma/rdma_cm.h -a \
527 -f ${O2IBPATH}/include/rdma/ib_cm.h -a \
528 -f ${O2IBPATH}/include/rdma/ib_verbs.h -a \
529 -f ${O2IBPATH}/include/rdma/ib_fmr_pool.h \); then
534 if ! $o2ib_found; then
538 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
539 3) AC_MSG_ERROR([bad --with-o2ib path]);;
540 *) AC_MSG_ERROR([internal error]);;
543 if test -f $O2IBPATH/config.mk; then
544 . $O2IBPATH/config.mk
545 elif test -f $O2IBPATH/ofed_patch.mk; then
546 . $O2IBPATH/ofed_patch.mk
548 if test -n "$BACKPORT_INCLUDES"; then
549 OFED_BACKPORT_PATH="$O2IBPATH/${BACKPORT_INCLUDES/*\/kernel_addons/kernel_addons}/"
550 EXTRA_LNET_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_LNET_INCLUDE"
560 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
561 # so we test if request_module is implemented or not
562 AC_DEFUN([LC_MODULE_LOADING],
563 [AC_MSG_CHECKING([if kernel module loading is possible])
565 #include <linux/kmod.h>
567 int myretval=ENOSYS ;
570 $makerule LUSTRE_KERNEL_TEST=conftest.i
572 grep request_module build/conftest.i | grep -v `grep "int myretval=" build/conftest.i | cut -d= -f2 | cut -d" " -f1` >/dev/null
575 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
576 [kernel module loading is possible])
580 AC_MSG_WARN([Kernel module loading support is highly recommended.])
586 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
587 # so we test if request_module is implemented or not
588 AC_DEFUN([LC_MODULE_LOADING],
589 [AC_MSG_CHECKING([if kernel module loading is possible])
591 #include <linux/kmod.h>
593 int myretval=ENOSYS ;
596 $makerule LUSTRE_KERNEL_TEST=conftest.i
598 grep request_module build/conftest.i | grep -v `grep "int myretval=" build/conftest.i | cut -d= -f2 | cut -d" " -f1` >/dev/null
601 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
602 [kernel module loading is possible])
606 AC_MSG_WARN([Kernel module loading support is highly recommended.])
616 AC_DEFUN([LB_PROG_LINUX],
622 LB_LINUX_CONFIG([MODULES],[],[
623 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
626 LB_LINUX_CONFIG([MODVERSIONS])
628 LB_LINUX_CONFIG([KALLSYMS],[],[
629 if test "x$ARCH_UM" = "x" ; then
630 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
637 #LB_LINUX_CONFIG_BIG_STACK
639 # it's ugly to be doing anything with OFED outside of the lnet module, but
640 # this has to be done here so that the backports path is set before all of
641 # the LN_PROG_LINUX checks are done
642 LB_CONFIG_OFED_BACKPORTS
646 # LB_LINUX_CONDITIONALS
648 # AM_CONDITIONALS for linux
650 AC_DEFUN([LB_LINUX_CONDITIONALS],
651 [AM_CONDITIONAL(LINUX25, test x$linux25 = xyes)
656 # LB_CHECK_SYMBOL_EXPORT
657 # check symbol exported or not
659 # $2 - file(s) for find.
663 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
665 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
666 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
667 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
669 if test $rc -ne 0; then
672 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
674 if test $rc -eq 0; then
679 if test $export -eq 0; then
693 # Like AC_CHECK_HEADER but checks for a kernel-space header
695 m4_define([LB_CHECK_LINUX_HEADER],
696 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
697 AC_CACHE_CHECK([for $1], ac_Header,
698 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
700 [test -s build/conftest.o],
701 [AS_VAR_SET(ac_Header, [yes])],
702 [AS_VAR_SET(ac_Header, [no])])])
703 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
704 AS_VAR_POPDEF([ac_Header])dnl
710 # Determine if the target is a dpkg system or rpm
712 AC_DEFUN([LB_USES_DPKG],
714 AC_MSG_CHECKING([if this distro uses dpkg])
715 case `lsb_release -i -s 2>/dev/null` in