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])
65 Cannot find UTS_RELEASE definition.
67 This is often provided by the kernel-devel package.
71 AC_MSG_RESULT([${UTS_RELEASE}])
73 LINUX_VERSION=${UTS_RELEASE}
74 AC_SUBST(LINUX_VERSION)
75 LINUXRELEASE=${UTS_RELEASE}
76 AC_SUBST(LINUXRELEASE)
83 # get the release version of linux
85 AC_DEFUN([LB_LINUX_RELEASE],
89 # ------------ RELEASE --------------------------------
90 AC_MSG_CHECKING([for Lustre release])
91 AC_ARG_WITH([release],
92 AC_HELP_STRING([--with-release=string],
93 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
96 if test -n "$DOWNSTREAM_RELEASE"; then
97 RELEASE="${DOWNSTREAM_RELEASE}_"
99 RELEASE="$RELEASE`echo ${LINUXRELEASE} | tr '-' '_'`_$BUILDID"])
100 AC_MSG_RESULT($RELEASE)
103 # check if the kernel is one from RHEL or SUSE
104 AC_MSG_CHECKING([for RedHat kernel version])
105 AS_IF([fgrep -q RHEL_RELEASE ${LINUX_OBJ}/include/$VERSION_HDIR/version.h], [
107 RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
108 ${LINUX_OBJ}/include/$VERSION_HDIR/version.h) + 1)
109 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< ${LINUXRELEASE})
110 RHEL_KERNEL_VERSION=${KERNEL_VERSION}-${RHEL_RELEASE}
111 AC_SUBST(RHEL_KERNEL_VERSION)
112 AC_MSG_RESULT([${RHEL_KERNEL_VERSION}])
114 AC_MSG_RESULT([not found])
115 LB_LINUX_CONFIG([SUSE_KERNEL],[SUSE_KERNEL="yes"],[])
118 AC_MSG_CHECKING([for kernel module package directory])
119 AC_ARG_WITH([kmp-moddir],
120 AC_HELP_STRING([--with-kmp-moddir=string],
121 [set the kmod updates or extra directory]),
122 [KMP_MODDIR=$withval],[
123 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra"],
124 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates"])])
126 AC_MSG_RESULT($KMP_MODDIR)
129 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/$(KMP_MODDIR)/kernel'
132 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
133 AC_SUBST(modulefsdir)
135 modulenetdir='$(moduledir)/net/$(PACKAGE)'
136 AC_SUBST(modulenetdir)
140 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
141 AC_DEFUN([LB_ARG_REPLACE_PATH],[
143 eval "set x $ac_configure_args"
151 arg=$(printf %s\n ["$arg"] | \
152 sed "s/'/'\\\\\\\\''/g")
155 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
156 new_configure_args="$new_configure_args \"$arg\""
158 ac_configure_args=$new_configure_args
161 # this is the work-horse of the next function
162 AC_DEFUN([__LB_ARG_CANON_PATH], [
163 [$3]=$(readlink -f $with_$2)
164 LB_ARG_REPLACE_PATH([$1], $[$3])
167 # a front-end for the above function that transforms - and . in the
168 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
169 AC_DEFUN([LB_ARG_CANON_PATH], [
170 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
177 # Find paths for linux, handling kernel-source rpms
179 AC_DEFUN([LB_LINUX_PATH],
180 [# prep some default values
181 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
182 if readlink -q -e $DEFAULT_LINUX; then
186 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
187 PATHS="/lib/modules/$(uname -r)/build"
189 PATHS+=" $DEFAULT_LINUX"
190 for DEFAULT_LINUX_OBJ in $PATHS; do
191 if readlink -q -e $DEFAULT_LINUX_OBJ; then
195 AC_MSG_CHECKING([for Linux sources])
197 AC_HELP_STRING([--with-linux=path],
198 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
199 [LB_ARG_CANON_PATH([linux], [LINUX])
200 DEFAULT_LINUX_OBJ=$LINUX],
201 [LINUX=$DEFAULT_LINUX])
202 AC_MSG_RESULT([$LINUX])
205 # -------- check for linux --------
206 LB_CHECK_FILE([$LINUX],[],
207 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
209 # -------- linux objects (for 2.6) --
210 AC_MSG_CHECKING([for Linux objects dir])
211 AC_ARG_WITH([linux-obj],
212 AC_HELP_STRING([--with-linux-obj=path],
213 [set path to Linux objects dir (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
214 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
215 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
217 AC_MSG_RESULT([$LINUX_OBJ])
220 # -------- check for .config --------
221 AC_ARG_WITH([linux-config],
222 [AC_HELP_STRING([--with-linux-config=path],
223 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
224 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
225 [LINUX_CONFIG=$LINUX_OBJ/.config])
226 AC_SUBST(LINUX_CONFIG)
228 LB_CHECK_FILE([/boot/kernel.h],
229 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
230 [LB_CHECK_FILE([/var/adm/running-kernel.h],
231 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
233 AC_ARG_WITH([kernel-source-header],
234 AC_HELP_STRING([--with-kernel-source-header=path],
235 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
236 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
238 # ------------ .config exists ----------------
239 LB_CHECK_FILE([$LINUX_CONFIG],[],
242 Kernel config could not be found.
244 If you are building from a kernel-source rpm consult build/README.kernel-source
248 # ----------- make dep run? ------------------
249 # at 2.6.19 # $LINUX/include/linux/config.h is removed
250 # and at more old has only one line
251 # include <autoconf.h>
252 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],[AUTOCONF_HDIR=generated],
253 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],[AUTOCONF_HDIR=linux],
254 [AC_MSG_ERROR([Run make config in $LINUX.])])])
255 AC_SUBST(AUTOCONF_HDIR)
256 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h], [VERSION_HDIR=linux],
257 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
258 [VERSION_HDIR=generated/uapi/linux],
259 [AC_MSG_ERROR([Run make config in $LINUX.])])
261 AC_SUBST(VERSION_HDIR)
263 # ----------- kconfig.h exists ---------------
264 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
265 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
266 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
267 [CONFIG_INCLUDE=include/linux/kconfig.h],
268 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
269 AC_SUBST(CONFIG_INCLUDE)
271 # ------------ rhconfig.h includes runtime-generated bits --
272 # red hat kernel-source checks
274 # we know this exists after the check above. if the user
275 # tarred up the tree and ran make dep etc. in it, then
276 # version.h gets overwritten with a standard linux one.
278 if grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null ; then
279 # This is a clean kernel-source tree, we need to
280 # enable extensive workarounds to get this to build
282 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
283 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
286 Using /boot/kernel.h from RUNNING kernel.
288 If this is not what you want, use --with-kernel-source-header.
289 Consult build/README.kernel-source for details.
292 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
293 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
296 # this is needed before we can build modules
300 # --- check that we can build modules at all
301 AC_MSG_CHECKING([that modules can be built at all])
302 LB_LINUX_TRY_COMPILE([],[],[
308 Kernel modules cannot be built. Consult config.log for details.
310 If you are trying to build with a kernel-source rpm,
311 consult build/README.kernel-source
316 ]) # end of LB_LINUX_PATH
318 # LB_LINUX_SYMVERFILE
319 # SLES 9 uses a different name for this file - unsure about vanilla kernels
320 # around this version, but it matters for servers only.
321 AC_DEFUN([LB_LINUX_SYMVERFILE],
322 [AC_MSG_CHECKING([name of module symbol version file])
323 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
324 SYMVERFILE=Modules.symvers
326 SYMVERFILE=Module.symvers
328 AC_MSG_RESULT($SYMVERFILE)
335 # check for cross compilation
337 AC_DEFUN([LB_LINUX_CROSS],
338 [AC_MSG_CHECKING([for cross compilation])
339 AS_IF([test "x$cross_compiling" = xno], [AC_MSG_RESULT([no])],
340 [case $host_vendor in
341 # The K1OM architecture is an extension of the x86 architecture
342 # and in MPSS 2.1 it's defined in $host_vendor. But in MPSS 3.x
343 # it's defined in $host_arch. So, try to support both case.
345 AC_MSG_RESULT([Intel(R) Xeon Phi(TM)])
346 CC_TARGET_ARCH=`$CC -v 2>&1 | grep Target: | sed -e 's/Target: //'`
347 AC_SUBST(CC_TARGET_ARCH)
348 if test \( $CC_TARGET_ARCH != x86_64-k1om-linux \
349 -a $CC_TARGET_ARCH != k1om-mpss-linux \)
351 AC_MSG_ERROR([Cross compiler not found in PATH.])
353 CROSS_VARS="ARCH=k1om CROSS_COMPILE=${CC_TARGET_ARCH}-"
354 CROSS_PATH="${CROSS_PATH:=/opt/lustre/${VERSION}/${CC_TARGET_ARCH}}"
356 # need to produce special section for debuginfo extraction
357 LDFLAGS="${LDFLAGS} -Wl,--build-id"
358 EXTRA_KLDFLAGS="${EXTRA_KLDFLAGS} -Wl,--build-id"
359 if test x$enable_server != xno ; then
360 AC_MSG_WARN([Disabling server (not supported for k1om architecture).])
365 AC_MSG_RESULT([yes, but no changes])
373 # these are like AC_TRY_COMPILE, but try to build modules against the
374 # kernel, inside the build directory
376 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
377 # --------------------------------------
378 m4_define([LB_LANG_PROGRAM],
380 #include <linux/kernel.h>
385 dnl Do *not* indent the following line: there may be CPP directives.
386 dnl Don't move the `;' right after for the same reason.
393 # LB_LINUX_COMPILE_IFELSE
395 # like AC_COMPILE_IFELSE
397 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
398 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
399 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
400 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/')
401 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])],
403 [_AC_MSG_LOG_CONFTEST
404 m4_ifvaln([$5],[$5])dnl])
405 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
411 # Determine the kernel's idea of the current architecture
413 AC_DEFUN([LB_LINUX_ARCH],
414 [AC_MSG_CHECKING([Linux kernel architecture])
415 AS_IF([rm -f $PWD/build/arch
416 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
417 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX $CROSS_VARS \
418 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
419 [AC_MSG_RESULT([$LINUX_ARCH])],
420 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
424 # LB_LINUX_TRY_COMPILE
426 # like AC_TRY_COMPILE
428 AC_DEFUN([LB_LINUX_TRY_COMPILE],
429 [LB_LINUX_COMPILE_IFELSE(
430 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
432 [test -s build/conftest.o],
438 # check if a given config option is defined
440 AC_DEFUN([LB_LINUX_CONFIG],[
441 AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
442 LB_LINUX_TRY_COMPILE([
443 #include <$AUTOCONF_HDIR/autoconf.h>
446 #error CONFIG_$1 not #defined
460 # check if a given config option is builtin or as module
462 AC_DEFUN([LB_LINUX_CONFIG_IM],[
463 AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
464 LB_LINUX_TRY_COMPILE([
465 #include <$AUTOCONF_HDIR/autoconf.h>
467 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
468 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
482 # like LB_LINUX_TRY_COMPILE, but with different arguments
484 AC_DEFUN([LB_LINUX_TRY_MAKE],
485 [LB_LINUX_COMPILE_IFELSE(
486 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
487 [$3], [$4], [$5], [$6]
492 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
493 # so we test if request_module is implemented or not
494 AC_DEFUN([LC_MODULE_LOADING],
495 [AC_MSG_CHECKING([if kernel module loading is possible])
497 #include <linux/kmod.h>
499 int myretval=ENOSYS ;
502 $makerule LUSTRE_KERNEL_TEST=conftest.i
504 grep request_module build/conftest.i |dnl
505 grep -v `grep "int myretval=" build/conftest.i |dnl
506 cut -d= -f2 | cut -d" " -f1`dnl
510 AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
511 [kernel module loading is possible])
516 Kernel module loading support is highly recommended.
526 AC_DEFUN([LB_PROG_LINUX],
532 LB_LINUX_CONFIG([MODULES],[],[
535 module support is required to build Lustre kernel modules.
539 LB_LINUX_CONFIG([MODVERSIONS])
541 LB_LINUX_CONFIG([KALLSYMS],[],[
544 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
553 # LB_CHECK_SYMBOL_EXPORT
554 # check symbol exported or not
556 # $2 - file(s) for find.
560 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
562 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
563 [AC_MSG_CHECKING([if Linux was built with symbol $1 exported])
564 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null
566 if test $rc -ne 0; then
569 grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null
571 if test $rc -eq 0; then
576 if test $export -eq 0; then
590 # Like AC_CHECK_HEADER but checks for a kernel-space header
592 m4_define([LB_CHECK_LINUX_HEADER],
593 [AS_VAR_PUSHDEF([ac_Header], [ac_cv_header_$1])dnl
594 AC_CACHE_CHECK([for $1], ac_Header,
595 [LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
597 [test -s build/conftest.o],
598 [AS_VAR_SET(ac_Header, [yes])],
599 [AS_VAR_SET(ac_Header, [no])])])
600 AS_IF([test AS_VAR_GET(ac_Header) = yes], [$2], [$3])[]dnl
601 AS_VAR_POPDEF([ac_Header])dnl
607 # Determine if the target is a dpkg system or rpm
609 AC_DEFUN([LB_USES_DPKG],
611 AC_MSG_CHECKING([if this distro uses dpkg])
612 case `lsb_release -i -s 2>/dev/null` in