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"
117 AC_MSG_CHECKING([that SuSe kernel])
118 LB_LINUX_TRY_COMPILE([
119 #include <linux/version.h>
121 #ifndef SLE_VERSION_CODE
122 #error "not sles kernel"
137 # Find paths for linux, handling kernel-source rpms
139 AC_DEFUN([LB_LINUX_PATH],
140 [AC_MSG_CHECKING([for Linux sources])
142 AC_HELP_STRING([--with-linux=path],
143 [set path to Linux source (default=/usr/src/linux)]),
145 [LINUX=/usr/src/linux])
146 AC_MSG_RESULT([$LINUX])
149 # -------- check for linux --------
150 LB_CHECK_FILE([$LINUX],[],
151 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
153 # -------- linux objects (for 2.6) --
154 AC_MSG_CHECKING([for Linux objects dir])
155 AC_ARG_WITH([linux-obj],
156 AC_HELP_STRING([--with-linux-obj=path],
157 [set path to Linux objects dir (default=$LINUX)]),
158 [LINUX_OBJ=$with_linux_obj],
160 AC_MSG_RESULT([$LINUX_OBJ])
163 # -------- check for .config --------
164 AC_ARG_WITH([linux-config],
165 [AC_HELP_STRING([--with-linux-config=path],
166 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
167 [LINUX_CONFIG=$with_linux_config],
168 [LINUX_CONFIG=$LINUX_OBJ/.config])
169 AC_SUBST(LINUX_CONFIG)
171 LB_CHECK_FILE([/boot/kernel.h],
172 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
173 [LB_CHECK_FILE([/var/adm/running-kernel.h],
174 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
176 AC_ARG_WITH([kernel-source-header],
177 AC_HELP_STRING([--with-kernel-source-header=path],
178 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
179 [KERNEL_SOURCE_HEADER=$with_kernel_source_header])
181 # ------------ .config exists ----------------
182 LB_CHECK_FILE([$LINUX_CONFIG],[],
183 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
185 # ----------- make dep run? ------------------
186 # at 2.6.19 # $LINUX/include/linux/config.h is removed
187 # and at more old has only one line
188 # include <autoconf.h>
189 LB_CHECK_FILES([$LINUX_OBJ/include/linux/autoconf.h
190 $LINUX_OBJ/include/linux/version.h
192 [AC_MSG_ERROR([Run make config in $LINUX.])])
194 # ------------ rhconfig.h includes runtime-generated bits --
195 # red hat kernel-source checks
197 # we know this exists after the check above. if the user
198 # tarred up the tree and ran make dep etc. in it, then
199 # version.h gets overwritten with a standard linux one.
201 if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then
202 # This is a clean kernel-source tree, we need to
203 # enable extensive workarounds to get this to build
205 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
206 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
207 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
208 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
209 AC_MSG_WARN([Consult build/README.kernel-source for details.])
211 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
212 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
215 # this is needed before we can build modules
219 # --- check that we can build modules at all
220 AC_MSG_CHECKING([that modules can be built at all])
221 LB_LINUX_TRY_COMPILE([],[],[
225 AC_MSG_WARN([Consult config.log for details.])
226 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
227 AC_MSG_ERROR([Kernel modules cannot be built.])
231 ]) # end of LB_LINUX_PATH
237 # Find modpost and check it
239 AC_DEFUN([LB_LINUX_MODPOST],
241 # Find the modpost utility
242 LB_CHECK_FILE([$LINUX_OBJ/scripts/mod/modpost],
243 [MODPOST=$LINUX_OBJ/scripts/mod/modpost],
244 [LB_CHECK_FILE([$LINUX_OBJ/scripts/modpost],
245 [MODPOST=$LINUX_OBJ/scripts/modpost],
246 AC_MSG_ERROR([modpost not found.])
252 AC_MSG_CHECKING([if modpost can be run])
256 AC_MSG_ERROR([modpost can not be run.])
259 # Check if modpost supports (and therefore requires) -m
260 AC_MSG_CHECKING([if modpost supports -m])
261 if $MODPOST -m 2>/dev/null ; then
268 AC_SUBST(MODPOST_ARGS)
274 # check for a uml kernel
276 AC_DEFUN([LB_LINUX_UML],
280 AC_MSG_CHECKING([if you are running user mode linux for $target_cpu])
281 if test -e $LINUX/include/asm-um ; then
282 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
284 # see notes in Rules.in
288 AC_MSG_RESULT([no (asm doesn't point at asm-um)])
291 AC_MSG_RESULT([no (asm-um missing)])
297 # these are like AC_TRY_COMPILE, but try to build modules against the
298 # kernel, inside the build directory
303 # create a conftest.c file
305 AC_DEFUN([LB_LINUX_CONFTEST],
306 [cat >conftest.c <<_ACEOF
312 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
313 # --------------------------------------
314 m4_define([LB_LANG_PROGRAM],
319 dnl Do *not* indent the following line: there may be CPP directives.
320 dnl Don't move the `;' right after for the same reason.
327 # LB_LINUX_COMPILE_IFELSE
329 # like AC_COMPILE_IFELSE
331 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
332 [m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl
333 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
334 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$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])],
336 [_AC_MSG_LOG_CONFTEST
337 m4_ifvaln([$5],[$5])dnl])dnl
338 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
344 # Determine the kernel's idea of the current architecture
346 AC_DEFUN([LB_LINUX_ARCH],
347 [AC_MSG_CHECKING([Linux kernel architecture])
348 AS_IF([rm -f $PWD/build/arch
349 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
350 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX_OBJ $ARCH_UM \
351 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
352 [AC_MSG_RESULT([$LINUX_ARCH])],
353 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
357 # LB_LINUX_TRY_COMPILE
359 # like AC_TRY_COMPILE
361 AC_DEFUN([LB_LINUX_TRY_COMPILE],
362 [LB_LINUX_COMPILE_IFELSE(
363 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
365 [test -s build/conftest.o],
371 # check if a given config option is defined
373 AC_DEFUN([LB_LINUX_CONFIG],
374 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
375 LB_LINUX_TRY_COMPILE([
376 #include <linux/autoconf.h>
379 #error CONFIG_$1 not #defined
393 # check if a given config option is builtin or as module
395 AC_DEFUN([LB_LINUX_CONFIG_IM],
396 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
397 LB_LINUX_TRY_COMPILE([
398 #include <linux/autoconf.h>
400 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
401 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
415 # like LB_LINUX_TRY_COMPILE, but with different arguments
417 AC_DEFUN([LB_LINUX_TRY_MAKE],
418 [LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [$3], [$4], [$5], [$6])])
421 # LB_LINUX_CONFIG_BIG_STACK
423 # check for big stack patch
425 AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK],
426 [if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then
429 LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[
430 LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[
431 LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[
432 AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.])
446 AC_DEFUN([LB_PROG_LINUX],
450 if test $LINUX_ARCH == "powerpc64"; then
451 CFLAGS="$CFLAGS -m64"
454 LB_LINUX_CONFIG([MODULES],[],[
455 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
458 LB_LINUX_CONFIG([MODVERSIONS])
460 LB_LINUX_CONFIG([PREEMPT],[
461 AC_MSG_ERROR([Lustre does not support kernels with preempt enabled.])
464 LB_LINUX_CONFIG([KALLSYMS],[],[
465 if test "x$ARCH_UM" = "x" ; then
466 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
470 LB_LINUX_CONFIG([KMOD],[],[
472 AC_MSG_WARN([Kernel module loading support is highly recommended.])
476 #LB_LINUX_CONFIG_BIG_STACK
481 # LB_LINUX_CONDITIONALS
483 # AM_CONDITIONALS for linux
485 AC_DEFUN([LB_LINUX_CONDITIONALS],
486 [AM_CONDITIONAL(LINUX25, test x$linux25 = xyes)
491 # LB_CHECK_SYMBOL_EXPORT
492 # check symbol exported or not
494 # $2 - file(s) for find.
498 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
500 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
501 [AC_MSG_CHECKING([if Linux was built with symbol $1 is exported])
502 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
504 if test $rc -ne 0; then
507 grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
509 if test $rc -eq 0; then
514 if test $export -eq 0; then