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=${UTS_RELEASE}
73 AC_SUBST(LINUXRELEASE)
80 # get the release version of linux
82 AC_DEFUN([LB_LINUX_RELEASE],
86 # ------------ RELEASE --------------------------------
87 AC_MSG_CHECKING([for Lustre release])
88 AC_ARG_WITH([release],
89 AC_HELP_STRING([--with-release=string],
90 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
93 if test -n "$DOWNSTREAM_RELEASE"; then
94 RELEASE="${DOWNSTREAM_RELEASE}_"
96 RELEASE="$RELEASE`echo ${LINUXRELEASE} | tr '-' '_'`_$BUILDID"])
97 AC_MSG_RESULT($RELEASE)
100 # check if the kernel is one from RHEL or SUSE
101 AC_MSG_CHECKING([for RedHat kernel version])
102 AS_IF([fgrep -q RHEL_RELEASE ${LINUX_OBJ}/include/$VERSION_HDIR/version.h], [
104 RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
105 ${LINUX_OBJ}/include/$VERSION_HDIR/version.h) + 1)
106 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< ${LINUXRELEASE})
107 RHEL_KERNEL_VERSION=${KERNEL_VERSION}-${RHEL_RELEASE}
108 AC_SUBST(RHEL_KERNEL_VERSION)
109 AC_MSG_RESULT([${RHEL_KERNEL_VERSION}])
111 AC_MSG_RESULT([not found])
112 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
115 AC_MSG_CHECKING([for kernel module package directory])
116 AC_ARG_WITH([kmp-moddir],
117 AC_HELP_STRING([--with-kmp-moddir=string],
118 [set the kmod updates or extra directory]),
119 [KMP_MODDIR=$withval],[
120 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra"],
121 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates"])])
123 AC_MSG_RESULT($KMP_MODDIR)
126 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/$(KMP_MODDIR)/kernel'
129 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
130 AC_SUBST(modulefsdir)
132 modulenetdir='$(moduledir)/net/$(PACKAGE)'
133 AC_SUBST(modulenetdir)
137 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
138 AC_DEFUN([LB_ARG_REPLACE_PATH],[
140 eval "set x $ac_configure_args"
148 arg=$(printf %s\n ["$arg"] | \
149 sed "s/'/'\\\\\\\\''/g")
152 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
153 new_configure_args="$new_configure_args \"$arg\""
155 ac_configure_args=$new_configure_args
158 # this is the work-horse of the next function
159 AC_DEFUN([__LB_ARG_CANON_PATH], [
160 [$3]=$(readlink -f $with_$2)
161 LB_ARG_REPLACE_PATH([$1], $[$3])
164 # a front-end for the above function that transforms - and . in the
165 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
166 AC_DEFUN([LB_ARG_CANON_PATH], [
167 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
174 # Find paths for linux, handling kernel-source rpms
176 AC_DEFUN([LB_LINUX_PATH],
177 [# prep some default values
178 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
179 if readlink -q -e $DEFAULT_LINUX; then
183 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
184 PATHS="/lib/modules/$(uname -r)/build"
186 PATHS+=" $DEFAULT_LINUX"
187 for DEFAULT_LINUX_OBJ in $PATHS; do
188 if readlink -q -e $DEFAULT_LINUX_OBJ; then
192 AC_MSG_CHECKING([for Linux sources])
194 AC_HELP_STRING([--with-linux=path],
195 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
196 [LB_ARG_CANON_PATH([linux], [LINUX])
197 DEFAULT_LINUX_OBJ=$LINUX],
198 [LINUX=$DEFAULT_LINUX])
199 AC_MSG_RESULT([$LINUX])
202 # -------- check for linux --------
203 LB_CHECK_FILE([$LINUX],[],
204 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
206 # -------- linux objects (for 2.6) --
207 AC_MSG_CHECKING([for Linux objects dir])
208 AC_ARG_WITH([linux-obj],
209 AC_HELP_STRING([--with-linux-obj=path],
210 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
211 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
212 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
214 AC_MSG_RESULT([$LINUX_OBJ])
217 # -------- check for .config --------
218 AC_ARG_WITH([linux-config],
219 [AC_HELP_STRING([--with-linux-config=path],
220 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
221 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
222 [LINUX_CONFIG=$LINUX_OBJ/.config])
223 AC_SUBST(LINUX_CONFIG)
225 LB_CHECK_FILE([/boot/kernel.h],
226 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
227 [LB_CHECK_FILE([/var/adm/running-kernel.h],
228 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
230 AC_ARG_WITH([kernel-source-header],
231 AC_HELP_STRING([--with-kernel-source-header=path],
232 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
233 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
235 # ------------ .config exists ----------------
236 LB_CHECK_FILE([$LINUX_CONFIG],[],
237 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
239 # ----------- make dep run? ------------------
240 # at 2.6.19 # $LINUX/include/linux/config.h is removed
241 # and at more old has only one line
242 # include <autoconf.h>
243 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated],
244 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
245 [AC_MSG_ERROR([Run make config in $LINUX.])])])
246 AC_SUBST(AUTOCONF_HDIR)
247 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h], [VERSION_HDIR=linux],
248 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
249 [VERSION_HDIR=generated/uapi/linux],
250 [AC_MSG_ERROR([Run make config in $LINUX.])])
252 AC_SUBST(VERSION_HDIR)
254 # ----------- kconfig.h exists ---------------
255 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
256 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
257 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
258 [CONFIG_INCLUDE=include/linux/kconfig.h],
259 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
260 AC_SUBST(CONFIG_INCLUDE)
262 # ------------ rhconfig.h includes runtime-generated bits --
263 # red hat kernel-source checks
265 # we know this exists after the check above. if the user
266 # tarred up the tree and ran make dep etc. in it, then
267 # version.h gets overwritten with a standard linux one.
269 if grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null ; then
270 # This is a clean kernel-source tree, we need to
271 # enable extensive workarounds to get this to build
273 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
274 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
275 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
276 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
277 AC_MSG_WARN([Consult build/README.kernel-source for details.])
279 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
280 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
283 # this is needed before we can build modules
287 # --- check that we can build modules at all
288 AC_MSG_CHECKING([that modules can be built at all])
289 LB_LINUX_TRY_COMPILE([],[],[
293 AC_MSG_WARN([Consult config.log for details.])
294 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
295 AC_MSG_ERROR([Kernel modules cannot be built.])
299 ]) # end of LB_LINUX_PATH
301 # LB_LINUX_SYMVERFILE
302 # SLES 9 uses a different name for this file - unsure about vanilla kernels
303 # around this version, but it matters for servers only.
304 AC_DEFUN([LB_LINUX_SYMVERFILE],
305 [AC_MSG_CHECKING([name of module symbol version file])
306 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
307 SYMVERFILE=Modules.symvers
309 SYMVERFILE=Module.symvers
311 AC_MSG_RESULT($SYMVERFILE)
318 # check for cross compilation
320 AC_DEFUN([LB_LINUX_CROSS],
321 [AC_MSG_CHECKING([for cross compilation])
322 AS_IF([test "x$cross_compiling" = xno], [AC_MSG_RESULT([no])],
323 [case $host_vendor in
324 # The K1OM architecture is an extension of the x86 architecture
325 # and in MPSS 2.1 it's defined in $host_vendor. But in MPSS 3.x
326 # it's defined in $host_arch. So, try to support both case.
328 AC_MSG_RESULT([Intel(R) Xeon Phi(TM)])
329 CC_TARGET_ARCH=`$CC -v 2>&1 | grep Target: | sed -e 's/Target: //'`
330 AC_SUBST(CC_TARGET_ARCH)
331 if test \( $CC_TARGET_ARCH != x86_64-k1om-linux \
332 -a $CC_TARGET_ARCH != k1om-mpss-linux \)
334 AC_MSG_ERROR([Cross compiler not found in PATH.])
336 CROSS_VARS="ARCH=k1om CROSS_COMPILE=${CC_TARGET_ARCH}-"
337 CROSS_PATH="${CROSS_PATH:=/opt/lustre/${VERSION}/${CC_TARGET_ARCH}}"
339 # need to produce special section for debuginfo extraction
340 LDFLAGS="${LDFLAGS} -Wl,--build-id"
341 EXTRA_KLDFLAGS="${EXTRA_KLDFLAGS} -Wl,--build-id"
342 if test x$enable_server != xno ; then
343 AC_MSG_WARN([Disabling server (not supported for k1om architecture).])
348 AC_MSG_RESULT([yes, but no changes])
356 # these are like AC_TRY_COMPILE, but try to build modules against the
357 # kernel, inside the build directory
359 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
360 # --------------------------------------
361 m4_define([LB_LANG_PROGRAM],
363 #include <linux/kernel.h>
368 dnl Do *not* indent the following line: there may be CPP directives.
369 dnl Don't move the `;' right after for the same reason.
376 # LB_LINUX_COMPILE_IFELSE
378 # like AC_COMPILE_IFELSE
380 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
381 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
382 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
383 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/')
384 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="$EXTRA_OFED_INCLUDE -I$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 ${SPL_OBJ:+-include $SPL_OBJ/spl_config.h} ${ZFS_OBJ:+-include $ZFS_OBJ/zfs_config.h} ${SPL:+-I$SPL -I$SPL/include } ${ZFS:+-I$ZFS -I$ZFS/include} -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])],
386 [_AC_MSG_LOG_CONFTEST
387 m4_ifvaln([$5],[$5])dnl])
388 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
394 # Determine the kernel's idea of the current architecture
396 AC_DEFUN([LB_LINUX_ARCH],
397 [AC_MSG_CHECKING([Linux kernel architecture])
398 AS_IF([rm -f $PWD/build/arch
399 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
400 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $CROSS_VARS \
401 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
402 [AC_MSG_RESULT([$LINUX_ARCH])],
403 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
407 # LB_LINUX_TRY_COMPILE
409 # like AC_TRY_COMPILE
411 AC_DEFUN([LB_LINUX_TRY_COMPILE],
412 [LB_LINUX_COMPILE_IFELSE(
413 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
415 [test -s build/conftest.o],
421 # check if a given config option is defined
423 AC_DEFUN([LB_LINUX_CONFIG],[
424 AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
425 LB_LINUX_TRY_COMPILE([
426 #include <$AUTOCONF_HDIR/autoconf.h>
429 #error CONFIG_$1 not #defined
443 # check if a given config option is builtin or as module
445 AC_DEFUN([LB_LINUX_CONFIG_IM],[
446 AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
447 LB_LINUX_TRY_COMPILE([
448 #include <$AUTOCONF_HDIR/autoconf.h>
450 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
451 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
465 # like LB_LINUX_TRY_COMPILE, but with different arguments
467 AC_DEFUN([LB_LINUX_TRY_MAKE],
468 [LB_LINUX_COMPILE_IFELSE(
469 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
470 [$3], [$4], [$5], [$6]
475 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
476 # so we test if request_module is implemented or not
477 AC_DEFUN([LC_MODULE_LOADING],
478 [AC_MSG_CHECKING([if kernel module loading is possible])
480 #include <linux/kmod.h>
482 int myretval=ENOSYS ;
485 $makerule LUSTRE_KERNEL_TEST=conftest.i
487 grep request_module build/conftest.i |dnl
488 grep -v `grep "int myretval=" build/conftest.i |dnl
489 cut -d= -f2 | cut -d" " -f1`dnl
493 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
494 [kernel module loading is possible])
498 AC_MSG_WARN([Kernel module loading support is highly recommended.])
508 AC_DEFUN([LB_PROG_LINUX],
514 LB_LINUX_CONFIG([MODULES],[],[
515 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
518 LB_LINUX_CONFIG([MODVERSIONS])
520 LB_LINUX_CONFIG([KALLSYMS],[],[
521 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
529 # LB_CHECK_SYMBOL_EXPORT
530 # check symbol exported or not
532 # $2 - file(s) for find.
536 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
538 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
539 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
540 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null
542 if test $rc -ne 0; then
545 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
547 if test $rc -eq 0; then
552 if test $export -eq 0; then
566 # Like AC_CHECK_HEADER but checks for a kernel-space header
568 m4_define([LB_CHECK_LINUX_HEADER],
569 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
570 AC_CACHE_CHECK([for $1], ac_Header,
571 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
573 [test -s build/conftest.o],
574 [AS_VAR_SET(ac_Header, [yes])],
575 [AS_VAR_SET(ac_Header, [no])])])
576 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
577 AS_VAR_POPDEF([ac_Header])dnl
583 # Determine if the target is a dpkg system or rpm
585 AC_DEFUN([LB_USES_DPKG],
587 AC_MSG_CHECKING([if this distro uses dpkg])
588 case `lsb_release -i -s 2>/dev/null` in