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 $LINUX_OBJ/include/linux/utsrelease.h ; then
59 LINUXRELEASEHEADER=utsrelease.h
61 LINUXRELEASEHEADER=version.h
64 #include <linux/$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/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 RELEASE="`echo ${LINUXRELEASE} | tr '-' '_'`_`date +%Y%m%d%H%M`"
99 AC_MSG_RESULT($RELEASE)
102 # check is redhat/suse kernels
103 AC_MSG_CHECKING([that RedHat kernel])
104 LB_LINUX_TRY_COMPILE([
105 #include <linux/version.h>
108 #error "not redhat kernel"
118 AC_MSG_CHECKING([that SuSe kernel])
119 LB_LINUX_TRY_COMPILE([
120 #include <linux/version.h>
122 #ifndef SLE_VERSION_CODE
123 #error "not sles kernel"
138 # Find paths for linux, handling kernel-source rpms
140 AC_DEFUN([LB_LINUX_PATH],
141 [AC_MSG_CHECKING([for Linux sources])
143 AC_HELP_STRING([--with-linux=path],
144 [set path to Linux source (default=/usr/src/linux)]),
146 if ! [[[ $with_linux = /* ]]]; then
147 AC_MSG_ERROR([You must provide an absolute pathname to the --with-linux= option.])
152 [LINUX=/usr/src/linux])
153 AC_MSG_RESULT([$LINUX])
156 # -------- check for linux --------
157 LB_CHECK_FILE([$LINUX],[],
158 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
160 # -------- linux objects (for 2.6) --
161 AC_MSG_CHECKING([for Linux objects dir])
162 AC_ARG_WITH([linux-obj],
163 AC_HELP_STRING([--with-linux-obj=path],
164 [set path to Linux objects dir (default=$LINUX)]),
165 [LINUX_OBJ=$with_linux_obj],
167 AC_MSG_RESULT([$LINUX_OBJ])
170 # -------- check for .config --------
171 AC_ARG_WITH([linux-config],
172 [AC_HELP_STRING([--with-linux-config=path],
173 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
174 [LINUX_CONFIG=$with_linux_config],
175 [LINUX_CONFIG=$LINUX_OBJ/.config])
176 AC_SUBST(LINUX_CONFIG)
178 LB_CHECK_FILE([/boot/kernel.h],
179 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
180 [LB_CHECK_FILE([/var/adm/running-kernel.h],
181 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
183 AC_ARG_WITH([kernel-source-header],
184 AC_HELP_STRING([--with-kernel-source-header=path],
185 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
186 [KERNEL_SOURCE_HEADER=$with_kernel_source_header])
188 # ------------ .config exists ----------------
189 LB_CHECK_FILE([$LINUX_CONFIG],[],
190 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
192 # ----------- make dep run? ------------------
193 # at 2.6.19 # $LINUX/include/linux/config.h is removed
194 # and at more old has only one line
195 # include <autoconf.h>
196 LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[],
197 [AC_MSG_ERROR([Run make config in $LINUX.])])
198 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],[],
199 [AC_MSG_ERROR([Run make config in $LINUX.])])
201 # ------------ rhconfig.h includes runtime-generated bits --
202 # red hat kernel-source checks
204 # we know this exists after the check above. if the user
205 # tarred up the tree and ran make dep etc. in it, then
206 # version.h gets overwritten with a standard linux one.
208 if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then
209 # This is a clean kernel-source tree, we need to
210 # enable extensive workarounds to get this to build
212 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
213 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
214 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
215 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
216 AC_MSG_WARN([Consult build/README.kernel-source for details.])
218 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
219 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
222 # this is needed before we can build modules
226 # --- check that we can build modules at all
227 AC_MSG_CHECKING([that modules can be built at all])
228 LB_LINUX_TRY_COMPILE([],[],[
232 AC_MSG_WARN([Consult config.log for details.])
233 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
234 AC_MSG_ERROR([Kernel modules cannot be built.])
238 ]) # end of LB_LINUX_PATH
240 # LB_LINUX_SYMVERFILE
241 # SLES 9 uses a different name for this file - unsure about vanilla kernels
242 # around this version, but it matters for servers only.
243 AC_DEFUN([LB_LINUX_SYMVERFILE],
244 [AC_MSG_CHECKING([name of module symbol version file])
245 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
246 SYMVERFILE=Modules.symvers
248 SYMVERFILE=Module.symvers
250 AC_MSG_RESULT($SYMVERFILE)
258 # Find modpost and check it
260 AC_DEFUN([LB_LINUX_MODPOST],
262 # Find the modpost utility
263 LB_CHECK_FILE([$LINUX_OBJ/scripts/mod/modpost],
264 [MODPOST=$LINUX_OBJ/scripts/mod/modpost],
265 [LB_CHECK_FILE([$LINUX_OBJ/scripts/modpost],
266 [MODPOST=$LINUX_OBJ/scripts/modpost],
267 AC_MSG_ERROR([modpost not found.])
273 AC_MSG_CHECKING([if modpost can be run])
277 AC_MSG_ERROR([modpost can not be run.])
280 # Check if modpost supports (and therefore requires) -m
281 AC_MSG_CHECKING([if modpost supports -m])
282 if $MODPOST -m 2>/dev/null ; then
289 AC_SUBST(MODPOST_ARGS)
295 # check for a uml kernel
297 AC_DEFUN([LB_LINUX_UML],
301 AC_MSG_CHECKING([if you are running user mode linux for $target_cpu])
302 if test -e $LINUX/include/asm-um ; then
303 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
305 # see notes in Rules.in
312 AC_MSG_RESULT([no (asm-um missing)])
318 # these are like AC_TRY_COMPILE, but try to build modules against the
319 # kernel, inside the build directory
324 # create a conftest.c file
326 AC_DEFUN([LB_LINUX_CONFTEST],
327 [cat >conftest.c <<_ACEOF
333 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
334 # --------------------------------------
335 m4_define([LB_LANG_PROGRAM],
340 dnl Do *not* indent the following line: there may be CPP directives.
341 dnl Don't move the `;' right after for the same reason.
348 # LB_LINUX_COMPILE_IFELSE
350 # like AC_COMPILE_IFELSE
352 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
353 [m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl
354 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
355 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/include -I$LINUX_OBJ/include -I$LINUX_OBJ/include2 -include include/linux/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])],
357 [_AC_MSG_LOG_CONFTEST
358 m4_ifvaln([$5],[$5])dnl])dnl
359 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
365 # Determine the kernel's idea of the current architecture
367 AC_DEFUN([LB_LINUX_ARCH],
368 [AC_MSG_CHECKING([Linux kernel architecture])
369 AS_IF([rm -f $PWD/build/arch
370 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
371 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $ARCH_UM \
372 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
373 [AC_MSG_RESULT([$LINUX_ARCH])],
374 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
378 # LB_LINUX_TRY_COMPILE
380 # like AC_TRY_COMPILE
382 AC_DEFUN([LB_LINUX_TRY_COMPILE],
383 [LB_LINUX_COMPILE_IFELSE(
384 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
386 [test -s build/conftest.o],
392 # check if a given config option is defined
394 AC_DEFUN([LB_LINUX_CONFIG],
395 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
396 LB_LINUX_TRY_COMPILE([
397 #include <linux/autoconf.h>
400 #error CONFIG_$1 not #defined
414 # check if a given config option is builtin or as module
416 AC_DEFUN([LB_LINUX_CONFIG_IM],
417 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
418 LB_LINUX_TRY_COMPILE([
419 #include <linux/autoconf.h>
421 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
422 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
436 # like LB_LINUX_TRY_COMPILE, but with different arguments
438 AC_DEFUN([LB_LINUX_TRY_MAKE],
439 [LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [$3], [$4], [$5], [$6])])
442 # LB_LINUX_CONFIG_BIG_STACK
444 # check for big stack patch
446 AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK],
447 [if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then
450 LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[
451 LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[
452 LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[
453 AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.])
463 # LB_CONFIG_OFED_BACKPORTS
465 # include any OFED backport headers in all compile commands
466 # NOTE: this does only include the backport paths, not the OFED headers
467 # adding the OFED headers is done in the lnet portion
468 AC_DEFUN([LB_CONFIG_OFED_BACKPORTS],
469 [AC_MSG_CHECKING([whether to use any OFED backport headers])
472 AC_HELP_STRING([--with-o2ib=path],
473 [build o2iblnd against path]),
476 yes) O2IBPATHS="$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 if ! $o2ib_found; then
506 2) AC_MSG_ERROR([kernel OpenIB gen2 headers not present]);;
507 3) AC_MSG_ERROR([bad --with-o2ib path]);;
508 *) AC_MSG_ERROR([internal error]);;
511 if test -f $O2IBPATH/config.mk; then
512 . $O2IBPATH/config.mk
513 elif test -f $O2IBPATH/ofed_patch.mk; then
514 . $O2IBPATH/ofed_patch.mk
516 if test -n "$BACKPORT_INCLUDES"; then
517 OFED_BACKPORT_PATH=`echo $BACKPORT_INCLUDES | sed "s#.*/src/ofa_kernel/#$O2IBPATH/#"`
518 EXTRA_LNET_INCLUDE="-I$OFED_BACKPORT_PATH $EXTRA_LNET_INCLUDE"
533 AC_DEFUN([LB_PROG_LINUX],
539 LB_LINUX_CONFIG([MODULES],[],[
540 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
543 LB_LINUX_CONFIG([MODVERSIONS])
545 LB_LINUX_CONFIG([KALLSYMS],[],[
546 if test "x$ARCH_UM" = "x" ; then
547 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
551 LB_LINUX_CONFIG([KMOD],[],[
553 AC_MSG_WARN([Kernel module loading support is highly recommended.])
557 #LB_LINUX_CONFIG_BIG_STACK
559 # it's ugly to be doing anything with OFED outside of the lnet module, but
560 # this has to be done here so that the backports path is set before all of
561 # the LN_PROG_LINUX checks are done
562 LB_CONFIG_OFED_BACKPORTS
566 # LB_LINUX_CONDITIONALS
568 # AM_CONDITIONALS for linux
570 AC_DEFUN([LB_LINUX_CONDITIONALS],
571 [AM_CONDITIONAL(LINUX25, test x$linux25 = xyes)
576 # LB_CHECK_SYMBOL_EXPORT
577 # check symbol exported or not
579 # $2 - file(s) for find.
583 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
585 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
586 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
587 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
589 if test $rc -ne 0; then
592 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
594 if test $rc -eq 0; then
599 if test $export -eq 0; then
613 # Like AC_CHECK_HEADER but checks for a kernel-space header
615 m4_define([LB_CHECK_LINUX_HEADER],
616 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
617 AC_CACHE_CHECK([for $1], ac_Header,
618 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
620 [test -s build/conftest.o],
621 [AS_VAR_SET(ac_Header, [yes])],
622 [AS_VAR_SET(ac_Header, [no])])])
623 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
624 AS_VAR_POPDEF([ac_Header])dnl