4 # Set things accordingly for a linux kernel
6 AC_DEFUN([LB_LINUX_VERSION], [
11 AC_CACHE_CHECK([for external module build target], lb_cv_module_target, [
12 lb_cv_module_target=""
13 MODULE_TARGET="SUBDIRS"
14 rm -f build/conftest.i
15 LB_LINUX_TRY_MAKE([], [],
16 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
17 [test -s build/conftest.i],
18 [lb_cv_module_target="SUBDIRS"], [
20 makerule="_module_$PWD/build"
21 LB_LINUX_TRY_MAKE([], [],
22 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
23 [test -s build/conftest.i],
24 [lb_cv_module_target="M"], [
25 AC_MSG_ERROR([unknown; check config.log for details])
29 AS_IF([test -z "$lb_cv_module_target"],
30 [AC_MSG_ERROR([unknown external module build target])],
31 [test "x$lb_cv_module_target" = "xM"],
32 [makerule="_module_$PWD/build"])
33 MODULE_TARGET=$lb_cv_module_target
34 AC_SUBST(MODULE_TARGET)
40 # Determine the Linux kernel version string from the utsrelease
42 AC_DEFUN([LB_LINUX_UTSRELEASE], [
43 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
45 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
46 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
47 utsrelease3=$LINUX_OBJ/include/linux/version.h
48 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
49 [utsrelease=$utsrelease1],
50 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
51 [utsrelease=$utsrelease2],
52 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
53 [utsrelease=$utsrelease3])
54 AS_IF([test -n "$utsrelease"],
55 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
58 Cannot find UTS_RELEASE definition.
60 This is often provided by the kernel-devel package.
64 AS_IF([test -z "$lb_cv_utsrelease"],
65 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
66 LINUXRELEASE=$lb_cv_utsrelease
67 AC_SUBST(LINUXRELEASE)
73 # get the release version of linux
75 AC_DEFUN([LB_LINUX_RELEASE], [
78 # ------------ RELEASE --------------------------------
79 AC_MSG_CHECKING([for Lustre release])
80 AC_ARG_WITH([release],
81 AC_HELP_STRING([--with-release=string],
82 [set the release string (default=$kvers_YYYYMMDDhhmm)]),
85 AS_IF([test "$DOWNSTREAM_RELEASE"], [RELEASE="${DOWNSTREAM_RELEASE}_"])
86 RELEASE="$RELEASE$(echo $LINUXRELEASE | tr '-' '_')_$BUILDID"])
87 AC_MSG_RESULT($RELEASE)
90 # check if the kernel is one from RHEL or SUSE
91 AC_CACHE_CHECK([for RedHat kernel version], lb_cv_rhel_kernel_version, [
92 lb_cv_rhel_kernel_version=""
93 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h],
94 [RHEL_RELEASE=$(expr 0$(awk -F \" '/ RHEL_RELEASE / { print [$]2 }' \
95 $LINUX_OBJ/include/$VERSION_HDIR/version.h) + 1)
96 KERNEL_VERSION=$(sed -e 's/\(@<:@23@:>@\.@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/' <<< $LINUXRELEASE)
97 lb_cv_rhel_kernel_version=${KERNEL_VERSION}-${RHEL_RELEASE}])
99 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
101 RHEL_KERNEL_VERSION=$lb_cv_rhel_kernel_version
104 LB_CHECK_CONFIG([SUSE_KERNEL], [SUSE_KERNEL="yes"], [SUSE_KERNEL="no"])
107 AC_MSG_CHECKING([for Linux kernel module package directory])
108 AC_ARG_WITH([kmp-moddir],
109 AC_HELP_STRING([--with-kmp-moddir=string],
110 [set the kmod updates or extra directory]),
111 [KMP_MODDIR=$withval],[
112 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra"],
113 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates"])])
114 AC_MSG_RESULT($KMP_MODDIR)
117 moduledir='$(CROSS_PATH)/lib/modules/$(LINUXRELEASE)/$(KMP_MODDIR)/kernel'
120 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
121 AC_SUBST(modulefsdir)
123 modulenetdir='$(moduledir)/net/$(PACKAGE)'
124 AC_SUBST(modulenetdir)
128 # LB_LINUX_SYMVERFILE
130 # SLES 9 uses a different name for this file - unsure about vanilla kernels
131 # around this version, but it matters for servers only.
132 AC_DEFUN([LB_LINUX_SYMVERFILE], [
133 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
134 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
135 [lb_cv_module_symvers=Modules.symvers],
136 [lb_cv_module_symvers=Module.symvers])
138 SYMVERFILE=$lb_cv_module_symvers
145 # check for cross compilation
147 AC_DEFUN([LB_LINUX_CROSS], [
148 AC_CACHE_CHECK([for cross compilation], lb_cv_cross, [
150 AS_IF([test "x$cross_compiling" = xyes],
151 [AS_CASE([$host_vendor],
153 # The K1OM architecture is an extension of the x86 architecture
154 # and in MPSS 2.1 it's defined in $host_vendor. But in MPSS 3.x
155 # it's defined in $host_arch. So, try to support both case.
156 lb_cv_cross=$($CC -v 2>&1 | grep Target: | sed -e 's/Target: //')
157 AS_IF([test "$lb_cv_cross" != x86_64-k1om-linux -a \
158 "$lb_cv_cross" != k1om-mpss-linux], [
159 AC_MSG_ERROR([Cross compiler not found in PATH.])
164 AS_IF([test "$lb_cv_cross" = x86_64-k1om-linux -o \
165 "$lb_cv_cross" = k1om-mpss-linux], [
166 CROSS_VARS="ARCH=k1om CROSS_COMPILE=${lb_cv_cross}-"
167 CROSS_PATH="${CROSS_PATH:=/opt/lustre/$VERSION/$lb_cv_cross}"
169 # need to produce special section for debuginfo extraction
170 LDFLAGS="$LDFLAGS -Wl,--build-id"
171 EXTRA_KLDFLAGS="$EXTRA_KLDFLAGS -Wl,--build-id"
172 AS_IF([test "x$enable_server" != xno], [
173 AC_MSG_WARN([Disabling server (not supported for $lb_cv_cross).])
182 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
184 AC_DEFUN([LB_ARG_REPLACE_PATH], [
186 eval set -- $ac_configure_args
190 arg=--with-[$1]=[$2] ;;
192 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
194 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
195 new_configure_args="$new_configure_args '$arg'"
197 ac_configure_args=$new_configure_args
201 # __LB_ARG_CANON_PATH
203 # this is the work-horse of the next function
205 AC_DEFUN([__LB_ARG_CANON_PATH], [
206 [$3]=$(readlink -f $with_$2)
207 LB_ARG_REPLACE_PATH([$1], $[$3])
213 # a front-end for the above function that transforms - and . in the
214 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
216 AC_DEFUN([LB_ARG_CANON_PATH], [
217 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
223 # Find paths for linux, handling kernel-source rpms
225 AC_DEFUN([LB_LINUX_PATH], [
226 for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
227 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
229 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
230 PATHS="/lib/modules/$(uname -r)/build"
232 PATHS+=" $DEFAULT_LINUX"
233 for DEFAULT_LINUX_OBJ in $PATHS; do
234 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
237 AC_MSG_CHECKING([for Linux sources])
239 AC_HELP_STRING([--with-linux=path],
240 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
241 [LB_ARG_CANON_PATH([linux], [LINUX])
242 DEFAULT_LINUX_OBJ=$LINUX],
243 [LINUX=$DEFAULT_LINUX])
244 AC_MSG_RESULT([$LINUX])
247 # -------- check for linux --------
248 LB_CHECK_FILE([$LINUX], [],
249 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
251 # -------- linux objects (for 2.6) --
252 AC_MSG_CHECKING([for Linux objects])
253 AC_ARG_WITH([linux-obj],
254 AC_HELP_STRING([--with-linux-obj=path],
255 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
256 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
257 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
258 AC_MSG_RESULT([$LINUX_OBJ])
261 # -------- check for .config --------
262 AC_ARG_WITH([linux-config],
263 [AC_HELP_STRING([--with-linux-config=path],
264 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
265 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
266 [LINUX_CONFIG=$LINUX_OBJ/.config])
268 # -------- check if .config exists --
269 LB_CHECK_FILE([$LINUX_CONFIG], [],
272 Kernel config could not be found.
274 If you are building from a kernel-source rpm consult build/README.kernel-source
277 AC_SUBST(LINUX_CONFIG)
279 LB_CHECK_FILE([/boot/kernel.h],
280 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
281 [LB_CHECK_FILE([/var/adm/running-kernel.h],
282 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
284 AC_ARG_WITH([kernel-source-header],
285 AC_HELP_STRING([--with-kernel-source-header=path],
286 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
287 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
289 # ----------- make dep run? ------------------
290 # at 2.6.19 # $LINUX/include/linux/config.h is removed
291 # and at more old has only one line include <autoconf.h>
293 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
294 [AUTOCONF_HDIR=generated],
295 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
296 [AUTOCONF_HDIR=linux],
297 [AC_MSG_ERROR([Run make config in $LINUX.])])])
298 AC_SUBST(AUTOCONF_HDIR)
300 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
301 [VERSION_HDIR=linux],
302 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
303 [VERSION_HDIR=generated/uapi/linux],
304 [AC_MSG_ERROR([Run make config in $LINUX.])])])
305 AC_SUBST(VERSION_HDIR)
307 # ----------- kconfig.h exists ---------------
308 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
309 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
311 LB_CHECK_FILE([$LINUX_OBJ/include/linux/kconfig.h],
312 [CONFIG_INCLUDE=include/linux/kconfig.h],
313 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
314 AC_SUBST(CONFIG_INCLUDE)
316 # ------------ rhconfig.h includes runtime-generated bits --
317 # RedHat kernel-source checks
319 # we know this exists after the check above. if the user
320 # tarred up the tree and ran make dep etc. in it, then
321 # version.h gets overwritten with a standard linux one.
323 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
324 # This is a clean kernel-source tree, we need to
325 # enable extensive workarounds to get this to build modules
326 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
327 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
330 Using /boot/kernel.h from RUNNING kernel.
332 If this is not what you want, use --with-kernel-source-header.
333 Consult build/README.kernel-source for details.
338 $KERNEL_SOURCE_HEADER not found.
340 Consult build/README.kernel-source for details.
343 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
346 # this is needed before we can build modules
350 # --- check that we can build modules at all
351 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
355 Kernel modules cannot be built. Consult config.log for details.
357 If you are trying to build with a kernel-source rpm,
358 consult build/README.kernel-source
363 ]) # end of LB_LINUX_PATH
368 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
369 # so we test if request_module is implemented or not
370 AC_DEFUN([LC_MODULE_LOADING], [
371 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
373 #include <linux/kmod.h>
375 int myretval=ENOSYS ;
378 $makerule LUSTRE_KERNEL_TEST=conftest.i
380 grep request_module build/conftest.i |dnl
381 grep -v `grep "int myretval=" build/conftest.i |dnl
382 cut -d= -f2 | cut -d" " -f1`dnl
384 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
386 AS_IF([test "$lb_cv_module_loading" = yes],
387 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
388 [kernel module loading is possible])],
391 Kernel module loading support is highly recommended.
402 AC_DEFUN([LB_PROG_LINUX], [
406 LB_CHECK_CONFIG([MODULES], [], [
409 module support is required to build Lustre kernel modules.
413 LB_CHECK_CONFIG([MODVERSIONS])
415 LB_CHECK_CONFIG([KALLSYMS], [], [
418 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
429 # Determine if the target is a dpkg system or rpm
431 AC_DEFUN([LB_USES_DPKG], [
432 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
434 AS_CASE([$(lsb_release -i -s 2>/dev/null)],
435 [Ubuntu | Debian], [lb_cv_uses_dpkg="yes"])
437 uses_dpkg=$lb_cv_uses_dpkg
443 # check symbol exported or not
445 # $2 - file(s) for find.
449 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
451 AC_DEFUN([LB_CHECK_EXPORT], [
452 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
453 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
454 AS_VAR_SET([lb_export], [no])
455 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
456 [AS_VAR_SET([lb_export], [yes])],
458 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
459 AS_VAR_SET([lb_export], [yes])
464 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
465 AS_VAR_POPDEF([lb_export])dnl
471 # check if a given config option is defined
476 AC_DEFUN([LB_CHECK_CONFIG], [
477 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
479 #include <$AUTOCONF_HDIR/autoconf.h>
482 #error CONFIG_$1 not #defined
490 # check if a given config option is builtin or as module
491 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
495 AC_DEFUN([LB_CHECK_CONFIG_IM], [
496 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
498 #include <$AUTOCONF_HDIR/autoconf.h>
500 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
501 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
504 ]) # LB_CHECK_CONFIG_IM
507 # these are like AC_TRY_COMPILE, but try to build modules against the
508 # kernel, inside the build directory
512 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
513 # --------------------------------------
515 m4_define([LB_LANG_PROGRAM],
517 #include <linux/kernel.h>
522 dnl Do *not* indent the following line: there may be CPP directives.
523 dnl Don't move the `;' right after for the same reason.
530 # LB_LINUX_COMPILE_IFELSE
532 # like AC_COMPILE_IFELSE
534 # $1 - AC_LANG_SOURCE()
540 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
541 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
542 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
543 SUBARCH=$(echo $target_cpu | sed -e 's/powerpc64/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/')
544 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])],
546 [_AC_MSG_LOG_CONFTEST
547 m4_ifvaln([$5],[$5])dnl])
548 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
552 # LB_LINUX_TRY_COMPILE
554 # like AC_TRY_COMPILE
556 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
557 LB_LINUX_COMPILE_IFELSE(
558 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
559 [modules], [test -s build/conftest.o],
566 # like LB_LINUX_TRY_COMPILE, but with different arguments
568 AC_DEFUN([LB_LINUX_TRY_MAKE], [
569 LB_LINUX_COMPILE_IFELSE(
570 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
571 [$3], [$4], [$5], [$6])
576 # $1 - checking message
583 AC_DEFUN([LB_CHECK_COMPILE], [
584 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
585 AC_CACHE_CHECK([$1], lb_compile, [
586 LB_LINUX_TRY_COMPILE([$3], [$4],
587 [AS_VAR_SET([lb_compile], [yes])],
588 [AS_VAR_SET([lb_compile], [no])])
590 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
591 AS_VAR_POPDEF([lb_compile])dnl
592 ]) # LB_CHECK_COMPILE
595 # LB_CHECK_LINUX_HEADER
597 # Like AC_CHECK_HEADER but checks for a kernel-space header
599 m4_define([LB_CHECK_LINUX_HEADER], [
600 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
601 AC_CACHE_CHECK([for $1], lb_header, [
602 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
603 [modules], [test -s build/conftest.o],
604 [AS_VAR_SET([lb_header], [yes])],
605 [AS_VAR_SET([lb_header], [no])])
607 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
608 AS_VAR_POPDEF([lb_header])dnl
609 ]) # LB_CHECK_LINUX_HEADER