4 # in kernel compilation? (2.5 only)
6 AC_DEFUN([LB_LINUX_INKERNEL],
7 [AC_MSG_CHECKING([if inkernel build support is requested])
8 AC_ARG_ENABLE([inkernel],
9 AC_HELP_STRING([--enable-inkernel],
10 [set up 2.5 kernel makefiles]),
11 [],[enable_inkernel=no])
12 AC_MSG_RESULT([$enable_inkernel])
14 if test x$enable_inkernel = xyes ; then
15 echo ln -s `pwd` $LINUX/fs/lustre
17 ln -s `pwd` $LINUX/fs/lustre
18 find portals lustre -name Makefile.mk | sed 's/.mk$//' | xargs -n 1 \
19 sh -e -x -c '(cp -f $0.mk $0.in)'
27 # Set things accordingly for a 2.5 kernel
29 AC_DEFUN([LB_LINUX_VERSION],
30 [AC_CHECK_FILE([$LINUX/include/linux/namei.h],
38 AC_MSG_CHECKING([if you are using Linux 2.6])
39 AC_MSG_RESULT([$linux25])
41 MODULE_TARGET="SUBDIRS"
42 if test $linux25 = "yes" ; then
46 AC_MSG_CHECKING([for external module build support])
47 rm -f build/conftest.i
48 LB_LINUX_TRY_MAKE([],[],
49 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
50 [test -s build/conftest.i],
55 makerule="_module_$makerule"
60 makerule="_dir_$PWD/build"
63 AC_SUBST(MODULE_TARGET)
71 # get the release version of linux
73 AC_DEFUN([LB_LINUX_RELEASE],
75 rm -f build/conftest.i
76 AC_MSG_CHECKING([for Linux release])
78 #include <linux/version.h>
81 LINUXRELEASE=UTS_RELEASE;
83 $makerule LUSTRE_KERNEL_TEST=conftest.i
85 test -s build/conftest.i
87 # LINUXRELEASE="UTS_RELEASE"
88 eval $(grep "LINUXRELEASE=" build/conftest.i)
90 AC_MSG_RESULT([unknown])
91 AC_MSG_ERROR([Could not preprocess test program. Consult config.log for details.])
93 rm -f build/conftest.i
94 if test x$LINUXRELEASE = x ; then
95 AC_MSG_RESULT([unknown])
96 AC_MSG_ERROR([Could not determine Linux release version from linux/version.h.])
98 AC_MSG_RESULT([$LINUXRELEASE])
99 AC_SUBST(LINUXRELEASE)
101 moduledir='/lib/modules/'$LINUXRELEASE/kernel
104 modulefsdir='$(moduledir)/fs/$(PACKAGE)'
105 AC_SUBST(modulefsdir)
107 modulenetdir='$(moduledir)/net/$(PACKAGE)'
108 AC_SUBST(modulenetdir)
110 # ------------ RELEASE --------------------------------
111 AC_MSG_CHECKING([for Lustre release])
112 RELEASE="`echo ${LINUXRELEASE} | tr '-' '_'`_`date +%Y%m%d%H%M`"
113 AC_MSG_RESULT($RELEASE)
120 # Find paths for linux, handling kernel-source rpms
122 AC_DEFUN([LB_LINUX_PATH],
123 [AC_MSG_CHECKING([for Linux sources])
125 AC_HELP_STRING([--with-linux=path],
126 [set path to Linux source (default=/usr/src/linux)]),
128 [LINUX=/usr/src/linux])
129 AC_MSG_RESULT([$LINUX])
132 # -------- linux objects (for 2.6) --
133 AC_MSG_CHECKING([for Linux objects dir])
134 AC_ARG_WITH([linux-obj],
135 AC_HELP_STRING([--with-linux-obj=path],
136 [set path to Linux objects dir (default=$LINUX)]),
137 [LINUX_OBJ=$with_linux_obj],
139 AC_MSG_RESULT([$LINUX_OBJ])
142 # -------- check for .confg --------
143 AC_ARG_WITH([linux-config],
144 [AC_HELP_STRING([--with-linux-config=path],
145 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
146 [LINUX_CONFIG=$with_linux_config],
147 [LINUX_CONFIG=$LINUX_OBJ/.config])
148 AC_SUBST(LINUX_CONFIG)
150 AC_CHECK_FILE([/boot/kernel.h],
151 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
152 [AC_CHECK_FILE([/var/adm/running-kernel.h]),
153 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h']])
155 AC_ARG_WITH([kernel-source-header],
156 AC_HELP_STRING([--with-kernel-source-header=path],
157 [Use a different kernel version header. Consult README.kernel-source for details.]),
158 [KERNEL_SOURCE_HEADER=$with_kernel_source_header])
160 # ------------ .config exists ----------------
161 AC_CHECK_FILE([$LINUX_CONFIG],[],
162 [AC_MSG_ERROR([Kernel config could not be found. If you are building from a kernel-source rpm consult README.kernel-source])])
164 # ----------- make dep run? ------------------
165 AC_CHECK_FILES([$LINUX_OBJ/include/linux/autoconf.h
166 $LINUX_OBJ/include/linux/version.h
167 $LINUX/include/linux/config.h],[],
168 [AC_MSG_ERROR([Run make config in $LINUX.])])
170 # ------------ rhconfig.h includes runtime-generated bits --
171 # red hat kernel-source checks
173 # we know this exists after the check above. if the user
174 # tarred up the tree and ran make dep etc. in it, then
175 # version.h gets overwritten with a standard linux one.
177 if grep rhconfig $LINUX_OBJ/include/linux/version.h >/dev/null ; then
178 # This is a clean kernel-source tree, we need to
179 # enable extensive workarounds to get this to build
181 AC_CHECK_FILE([$KERNEL_SOURCE_HEADER],
182 [if test $KERNEL_SOURCE_HEADER = '/boot/kernel.h' ; then
183 AC_MSG_WARN([Using /boot/kernel.h from RUNNING kernel.])
184 AC_MSG_WARN([If this is not what you want, use --with-kernel-source-header.])
185 AC_MSG_WARN([Consult README.kernel-source for details.])
187 [AC_MSG_ERROR([$KERNEL_SOURCE_HEADER not found. Consult README.kernel-source for details.])])
188 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
191 # this is needed before we can build modules
194 # --- check that we can build modules at all
195 AC_MSG_CHECKING([that modules can be built at all])
196 LB_LINUX_TRY_COMPILE([],[],[
200 AC_MSG_WARN([Consult config.log for details.])
201 AC_MSG_WARN([If you are trying to build with a kernel-source rpm, consult README.kernel-source])
202 AC_MSG_ERROR([Kernel modules could not be built.])
211 # check for a uml kernel
213 AC_DEFUN([LB_LINUX_UML],
217 AC_MSG_CHECKING([if you are running user mode linux for $target_cpu])
218 if test -e $LINUX/include/asm-um ; then
219 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
221 # see notes in Rules.in
225 AC_MSG_RESULT([no (asm doesn't point at asm-um)])
228 AC_MSG_RESULT([no (asm-um missing)])
234 # these are like AC_TRY_COMPILE, but try to build modules against the
235 # kernel, inside the build directory
240 # create a conftest.c file
242 AC_DEFUN([LB_LINUX_CONFTEST],
243 [cat >conftest.c <<_ACEOF
249 # LB_LINUX_COMPILE_IFELSE
251 # like AC_COMPILE_IFELSE
253 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
254 [m4_ifvaln([$1], [LB_LINUX_CONFTEST([$1])])dnl
255 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
256 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG -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])],
258 [_AC_MSG_LOG_CONFTEST
259 m4_ifvaln([$5],[$5])dnl])dnl
260 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
264 # LB_LINUX_TRY_COMPILE
266 # like AC_TRY_COMPILE
268 AC_DEFUN([LB_LINUX_TRY_COMPILE],
269 [LB_LINUX_COMPILE_IFELSE(
270 [AC_LANG_PROGRAM([[$1]], [[$2]])],
272 [test -s build/conftest.o],
278 # check if a given config option is defined
280 AC_DEFUN([LB_LINUX_CONFIG],
281 [AC_MSG_CHECKING([if Linux was built with CONFIG_$1])
282 LB_LINUX_TRY_COMPILE([#include <linux/config.h>],[
284 #error CONFIG_$1 not #defined
298 # like LB_LINUX_TRY_COMPILE, but with different arguments
300 AC_DEFUN([LB_LINUX_TRY_MAKE],
301 [LB_LINUX_COMPILE_IFELSE([AC_LANG_PROGRAM([[$1]], [[$2]])], [$3], [$4], [$5], [$6])])
308 AC_DEFUN([LB_PROG_LINUX],
312 LB_LINUX_CONFIG([MODULES],[],[
313 AC_MSG_ERROR([module support is required to build Lustre kernel modules.])
316 LB_LINUX_CONFIG([MODVERSIONS])
318 LB_LINUX_CONFIG([PREEMPT],[
319 AC_MSG_ERROR([Lustre does not support kernels with preempt enabled.])
322 LB_LINUX_CONFIG([KALLSYMS],[],[
323 if test "x$ARCH_UM" = "x" ; then
324 AC_MSG_ERROR([Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.])
336 # LB_LINUX_CONDITIONALS
338 # AM_CONDITIONALS for linux
340 AC_DEFUN([LB_LINUX_CONDITIONALS],
341 [AM_CONDITIONAL(INKERNEL, test x$enable_inkernel = xyes)
342 AM_CONDITIONAL(LINUX25, test x$linux25 = xyes)
346 # LB_LINUX_STRUCT_PAGE_LIST
348 # 2.6.4 no longer has page->list
350 AC_DEFUN([LB_LINUX_STRUCT_PAGE_LIST],
351 [AC_MSG_CHECKING([if struct page has a list field])
352 LB_LINUX_TRY_COMPILE([
353 #include <linux/mm.h>
359 AC_DEFINE(HAVE_PAGE_LIST, 1, [struct page has a list field])
366 # LB_LINUX_STRUCT_SIGHAND
368 # red hat 2.4 adds sighand to struct task_struct
370 AC_DEFUN([LB_LINUX_STRUCT_SIGHAND],
371 [AC_MSG_CHECKING([if task_struct has a sighand field])
372 LB_LINUX_TRY_COMPILE([
373 #include <linux/sched.h>
375 struct task_struct p;
378 AC_DEFINE(CONFIG_RH_2_4_20, 1, [this kernel contains Red Hat 2.4.20 patches])
386 # LB_LINUX_FUNC_CPU_ONLINE
388 # cpu_online is different in rh 2.4, vanilla 2.4, and 2.6
390 AC_DEFUN([LB_LINUX_FUNC_CPU_ONLINE],
391 [AC_MSG_CHECKING([if kernel defines cpu_online()])
392 LB_LINUX_TRY_COMPILE([
393 #include <linux/sched.h>
398 AC_DEFINE(HAVE_CPU_ONLINE, 1, [cpu_online found])
405 # LB_LINUX_TYPE_CPUMASK_T
407 # same goes for cpumask_t
409 AC_DEFUN([LB_LINUX_TYPE_CPUMASK_T],
410 [AC_MSG_CHECKING([if kernel defines cpumask_t])
411 LB_LINUX_TRY_COMPILE([
412 #include <linux/sched.h>
414 return sizeof (cpumask_t);
417 AC_DEFINE(HAVE_CPUMASK_T, 1, [cpumask_t found])
424 # LB_LINUX_FUNC_SHOW_TASK
426 # we export show_task(), but not all kernels have it (yet)
428 AC_DEFUN([LB_LINUX_FUNC_SHOW_TASK],
429 [AC_MSG_CHECKING([if kernel exports show_task])
431 for file in ksyms sched ; do
432 if grep -q "EXPORT_SYMBOL(show_task)" \
433 "$LINUX/kernel/$file.c" 2>/dev/null ; then
438 if test x$have_show_task = x1 ; then
439 AC_DEFINE(HAVE_SHOW_TASK, 1, [show_task is exported])
447 # LB_LINUX_CONFIG_EXT3
449 # that ext3 is enabled in the kernel
451 AC_DEFUN([LB_LINUX_CONFIG_EXT3],
452 [LB_LINUX_CONFIG([EXT3_FS],[],[
453 LB_LINUX_CONFIG([EXT3_FS_MODULE],[],[$2])
455 LB_LINUX_CONFIG([EXT3_FS_XATTR],[$1],[$3])
461 # If we have (and can build) fshooks.h
463 AC_DEFUN([LB_LINUX_FSHOOKS],
464 [AC_MSG_CHECKING([if this compiler can build a SuSE 2.6 kernel])
465 # an excerpt from fshooks.h, which doesn't build with fedora's gcc 3.4
466 LB_LINUX_TRY_COMPILE([
467 /* for the lack of a kernel-wide definition */
471 } boolean_t __attribute__((__mode__(__QI__)));
476 AC_MSG_WARN([We suggest trying gcc 3.3.x.])
477 AC_MSG_WARN([You can set CC=gcc33 before running configure.])
478 AC_MSG_ERROR([Your compiler cannot build a SuSE 2.6 kernel.])
480 AC_MSG_CHECKING([if fshooks are present])
481 LB_LINUX_TRY_COMPILE([
482 #include <linux/fshooks.h>
493 # LB_LINUX_STRUCT_KIOBUF
495 # rh 2.4.18 has iobuf->dovary, but other kernels do not
497 AC_DEFUN([LB_LINUX_STRUCT_KIOBUF],
498 [AC_MSG_CHECKING([if struct kiobuf has a dovary field])
499 LB_LINUX_TRY_COMPILE([
500 #include <linux/iobuf.h>
506 AC_DEFINE(HAVE_KIOBUF_DOVARY, 1, [struct kiobuf has a dovary field])
513 # LB_LINUX_FUNC_COND_RESCHED
515 # cond_resched() was introduced in 2.4.20
517 AC_DEFUN([LB_LINUX_FUNC_COND_RESCHED],
518 [AC_MSG_CHECKING([if kernel offers cond_resched])
519 LB_LINUX_TRY_COMPILE([
520 #include <linux/sched.h>
525 AC_DEFINE(HAVE_COND_RESCHED, 1, [cond_resched found])
532 # LB_LINUX_FUNC_ZAP_PAGE_RANGE
534 # if zap_page_range() taks a vma arg
536 AC_DEFUN([LB_LINUX_FUNC_ZAP_PAGE_RANGE],
537 [AC_MSG_CHECKING([if zap_pag_range with vma parameter])
538 ZAP_PAGE_RANGE_VMA="`grep -c 'zap_page_range.*struct vm_area_struct' $LINUX/include/linux/mm.h`"
539 if test "$ZAP_PAGE_RANGE_VMA" != 0 ; then
540 AC_DEFINE(ZAP_PAGE_RANGE_VMA, 1, [zap_page_range with vma parameter])
550 # if proc_fs.h defines PDE()
552 AC_DEFUN([LB_LINUX_FUNC_PDE],
553 [AC_MSG_CHECKING([if kernel defines PDE])
554 HAVE_PDE="`grep -c 'proc_dir_entry..PDE' $LINUX/include/linux/proc_fs.h`"
555 if test "$HAVE_PDE" != 0 ; then
556 AC_DEFINE(HAVE_PDE, 1, [the kernel defines PDE])
564 # LB_LINUX_FUNC_DIRECT_IO
566 # if direct_IO takes a struct file argument
568 AC_DEFUN([LB_LINUX_FUNC_DIRECT_IO],
569 [AC_MSG_CHECKING([if kernel passes struct file to direct_IO])
570 HAVE_DIO_FILE="`grep -c 'direct_IO.*struct file' $LINUX/include/linux/fs.h`"
571 if test "$HAVE_DIO_FILE" != 0 ; then
572 AC_DEFINE(HAVE_DIO_FILE, 1, [the kernel passes struct file to direct_IO])
580 # LB_LINUX_HEADER_MM_INLINE
582 # RHEL kernels define page_count in mm_inline.h
584 AC_DEFUN([LB_LINUX_HEADER_MM_INLINE],
585 [AC_MSG_CHECKING([if kernel has mm_inline.h header])
586 LB_LINUX_TRY_COMPILE([
587 #include <linux/mm_inline.h>
590 #error mm_inline.h does not define page_count
594 AC_DEFINE(HAVE_MM_INLINE, 1, [mm_inline found])
601 # LB_LINUX_STRUCT_INODE
603 # if inode->i_alloc_sem exists
605 AC_DEFUN([LB_LINUX_STRUCT_INODE],
606 [AC_MSG_CHECKING([if struct inode has i_alloc_sem])
607 LB_LINUX_TRY_COMPILE([
608 #include <linux/fs.h>
609 #include <linux/version.h>
611 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,4,24))
612 #error "down_read_trylock broken before 2.4.24"
615 return (char *)&i.i_alloc_sem - (char *)&i;
618 AC_DEFINE(HAVE_I_ALLOC_SEM, 1, [struct inode has i_alloc_sem])