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"
134 # SLES 9 uses a different name for this file - unsure about vanilla kernels
135 # around this version, but it matters for servers only.
136 AC_DEFUN([LB_SYMVERFILE],
137 [AC_MSG_CHECKING([name of symverfile])
138 if grep -q Modules.symvers $LINUX/scripts/Makefile.modpost ; then
139 SYMVERFILE=Modules.symvers
141 SYMVERFILE=Module.symvers
143 AC_MSG_RESULT($SYMVERFILE)
151 # Find paths for linux, handling kernel-source rpms
153 AC_DEFUN([LB_LINUX_PATH],
154 [AC_MSG_CHECKING([for Linux sources])
156 AC_HELP_STRING([--with-linux=path],
157 [set path to Linux source (default=/usr/src/linux)]),
159 [LINUX=/usr/src/linux])
160 AC_MSG_RESULT([$LINUX])
163 # -------- check for linux --------
164 LB_CHECK_FILE([$LINUX],[],
165 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
167 # -------- linux objects (for 2.6) --
168 AC_MSG_CHECKING([for Linux objects dir])
169 AC_ARG_WITH([linux-obj],
170 AC_HELP_STRING([--with-linux-obj=path],
171 [set path to Linux objects dir (default=$LINUX)]),
172 [LINUX_OBJ=$with_linux_obj],
174 AC_MSG_RESULT([$LINUX_OBJ])
177 # -------- check for .config --------
178 AC_ARG_WITH([linux-config],
179 [AC_HELP_STRING([--with-linux-config=path],
180 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
181 [LINUX_CONFIG=$with_linux_config],
182 [LINUX_CONFIG=$LINUX_OBJ/.config])
183 AC_SUBST(LINUX_CONFIG)
185 LB_CHECK_FILE([/boot/kernel.h],
186 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
187 [LB_CHECK_FILE([/var/adm/running-kernel.h],
188 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
190 AC_ARG_WITH([kernel-source-header],
191 AC_HELP_STRING([--with-kernel-source-header=path],
192 [Use a different kernel version header. Consult build/README.kernel-source for details.]),
193 [KERNEL_SOURCE_HEADER=$with_kernel_source_header])
195 # ------------ .config exists ----------------
196 LB_CHECK_FILE([$LINUX_CONFIG],[],
197 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult build/README.kernel-source])])
199 # ----------- make dep run? ------------------
200 # at 2.6.19 # $LINUX/include/linux/config.h is removed
201 # and at more old has only one line
202 # include <autoconf.h>
203 LB_CHECK_FILES([$LINUX_OBJ/include/linux/autoconf.h
204 $LINUX_OBJ/include/linux/version.h
206 [AC_MSG_ERROR([Run make config in $LINUX.])])
208 # ------------ rhconfig.h includes runtime-generated bits --
209 # red hat kernel-source checks
211 # we know this exists after the check above. if the user
212 # tarred up the tree and ran make dep etc. in it, then
213 # version.h gets overwritten with a standard linux one.
215 if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then
216 # This is a clean kernel-source tree, we need to
217 # enable extensive workarounds to get this to build
219 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER],
220 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
221 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
222 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
223 AC_MSG_WARN([Consult build/README.kernel-source for details.])
225 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult build/README.kernel-source for details.])])
226 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
229 # this is needed before we can build modules
233 # --- check that we can build modules at all
234 AC_MSG_CHECKING([that modules can be built at all])
235 LB_LINUX_TRY_COMPILE([],[],[
239 AC_MSG_WARN([Consult config.log for details.])
240 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult build/README.kernel-source])
241 AC_MSG_ERROR([Kernel modules cannot be built.])
245 ]) # end of LB_LINUX_PATH
251 # Find modpost and check it
253 AC_DEFUN([LB_LINUX_MODPOST],
255 # Find the modpost utility
256 LB_CHECK_FILE([$LINUX_OBJ/scripts/mod/modpost],
257 [MODPOST=$LINUX_OBJ/scripts/mod/modpost],
258 [LB_CHECK_FILE([$LINUX_OBJ/scripts/modpost],
259 [MODPOST=$LINUX_OBJ/scripts/modpost],
260 AC_MSG_ERROR([modpost not found.])
266 AC_MSG_CHECKING([if modpost can be run])
270 AC_MSG_ERROR([modpost can not be run.])
273 # Check if modpost supports (and therefore requires) -m
274 AC_MSG_CHECKING([if modpost supports -m])
275 if $MODPOST -m 2>/dev/null ; then
282 AC_SUBST(MODPOST_ARGS)
288 # check for a uml kernel
290 AC_DEFUN([LB_LINUX_UML],
294 AC_MSG_CHECKING([if you are running user mode linux for $target_cpu])
295 if test -e $LINUX/include/asm-um ; then
296 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
298 # see notes in Rules.in
302 AC_MSG_RESULT([no (asm doesn't point at asm-um)])
305 AC_MSG_RESULT([no (asm-um missing)])
311 # these are like AC_TRY_COMPILE, but try to build modules against the
312 # kernel, inside the build directory
317 # create a conftest.c file
319 AC_DEFUN([LB_LINUX_CONFTEST],
320 [cat >conftest.c <<_ACEOF
326 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
327 # --------------------------------------
328 m4_define([LB_LANG_PROGRAM],
333 dnl Do *not* indent the following line: there may be CPP directives.
334 dnl Don't move the `;' right after for the same reason.
341 # LB_LINUX_COMPILE_IFELSE
343 # like AC_COMPILE_IFELSE
345 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
346 [m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl
347 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
348 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])],
350 [_AC_MSG_LOG_CONFTEST
351 m4_ifvaln([$5],[$5])dnl])dnl
352 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
358 # Determine the kernel's idea of the current architecture
360 AC_DEFUN([LB_LINUX_ARCH],
361 [AC_MSG_CHECKING([Linux kernel architecture])
362 AS_IF([rm -f $PWD/build/arch
363 make -s --no-print-directory echoarch -f $PWD/build/Makefile \
364 LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -C $LINUX_OBJ $ARCH_UM \
365 ARCHFILE=$PWD/build/arch && LINUX_ARCH=`cat $PWD/build/arch`],
366 [AC_MSG_RESULT([$LINUX_ARCH])],
367 [AC_MSG_ERROR([Could not determine the kernel architecture.])])
371 # LB_LINUX_TRY_COMPILE
373 # like AC_TRY_COMPILE
375 AC_DEFUN([LB_LINUX_TRY_COMPILE],
376 [LB_LINUX_COMPILE_IFELSE(
377 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
379 [test -s build/conftest.o],
385 # check if a given config option is defined
387 AC_DEFUN([LB_LINUX_CONFIG],
388 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
389 LB_LINUX_TRY_COMPILE([
390 #include <linux/autoconf.h>
393 #error CONFIG_$1 not #defined
407 # check if a given config option is builtin or as module
409 AC_DEFUN([LB_LINUX_CONFIG_IM],
410 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1 in or as module])
411 LB_LINUX_TRY_COMPILE([
412 #include <linux/autoconf.h>
414 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
415 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
429 # like LB_LINUX_TRY_COMPILE, but with different arguments
431 AC_DEFUN([LB_LINUX_TRY_MAKE],
432 [LB_LINUX_COMPILE_IFELSE([AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])], [$3], [$4], [$5], [$6])])
435 # LB_LINUX_CONFIG_BIG_STACK
437 # check for big stack patch
439 AC_DEFUN([LB_LINUX_CONFIG_BIG_STACK],
440 [if test "x$ARCH_UM" = "x" -a "x$linux25" = "xno" ; then
443 LB_LINUX_CONFIG([STACK_SIZE_16KB],[],[
444 LB_LINUX_CONFIG([STACK_SIZE_32KB],[],[
445 LB_LINUX_CONFIG([STACK_SIZE_64KB],[],[
446 AC_MSG_ERROR([Lustre requires that Linux is configured with at least a 16KB stack.])
460 AC_DEFUN([LB_PROG_LINUX],
465 if test $LINUX_ARCH == "powerpc64"; then
466 CFLAGS="$CFLAGS -m64"
469 LB_LINUX_CONFIG([MODULES],[],[
470 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
473 LB_LINUX_CONFIG([MODVERSIONS])
475 LB_LINUX_CONFIG([PREEMPT],[
476 AC_MSG_ERROR([Lustre does not support kernels with preempt enabled.])
479 LB_LINUX_CONFIG([KALLSYMS],[],[
480 if test "x$ARCH_UM" = "x" ; then
481 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
485 LB_LINUX_CONFIG([KMOD],[],[
487 AC_MSG_WARN([Kernel module loading support is highly recommended.])
491 #LB_LINUX_CONFIG_BIG_STACK
496 # LB_LINUX_CONDITIONALS
498 # AM_CONDITIONALS for linux
500 AC_DEFUN([LB_LINUX_CONDITIONALS],
501 [AM_CONDITIONAL(LINUX25, test x$linux25 = xyes)
506 # LB_CHECK_SYMBOL_EXPORT
507 # check symbol exported or not
509 # $2 - file(s) for find.
513 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers
515 AC_DEFUN([LB_CHECK_SYMBOL_EXPORT],
516 [AC_MSG_CHECKING([if Linux was built with symbol $1 is exported])
517 grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/$SYMVERFILE 2>/dev/null
519 if test $rc -ne 0; then
522 grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
524 if test $rc -eq 0; then
529 if test $export -eq 0; then