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,
13 lb_cv_module_target=""
14 rm -f build/conftest.i
17 LB_LINUX_TRY_MAKE([], [],
18 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
19 [test -s build/conftest.i],
20 [lb_cv_module_target="M54"], [
22 makerule="_module_$PWD/build"
23 LB_LINUX_TRY_MAKE([], [],
24 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
25 [test -s build/conftest.i],
26 [lb_cv_module_target="M"], [
29 LB_LINUX_TRY_MAKE([], [],
30 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
31 [test -s build/conftest.i],
32 [lb_cv_module_target="M58"], [
34 lb_cv_dequote_CC_VERSION_TEXT=yes
35 LB_LINUX_TRY_MAKE([], [],
36 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
37 [test -s build/conftest.i],
38 [lb_cv_module_target="M517"], [
39 AC_MSG_ERROR([kernel module make failed; check config.log for details])
42 # Linux commit v5.16-rc3-26-g129ab0d2d9f3
43 # added quotes around "$(CONFIG_CC_VERSION_TEXT)", however .config stores
44 # CONFIG_CC_VERSION_TEXT with quotes thus breaking the GNU make Makefile
45 # for external modules.
46 # Workaround by providing a non-quoted value to override the value in .config
47 unset lb_cv_dequote_CC_VERSION_TEXT
48 AC_CACHE_CHECK([for compiler version text], lb_cv_dequote_CC_VERSION_TEXT, [
49 AS_IF([test "x$lb_cv_module_target" = "xM517"],
50 [lb_cv_dequote_CC_VERSION_TEXT=yes],
51 [lb_cv_dequote_CC_VERSION_TEXT=yes])
53 AS_IF([test -z "$lb_cv_module_target"],
54 [AC_MSG_ERROR([unknown external module build target])],
55 [test "x$lb_cv_module_target" = "xM54"],
56 [makerule="$PWD/build"
57 lb_cv_module_target="M"],
58 [test "x$lb_cv_module_target" = "xM58"],
60 lb_cv_module_target="M"],
61 [test "x$lb_cv_module_target" = "xM517"],
63 lb_cv_module_target="M"],
64 [test "x$lb_cv_module_target" = "xM"],
65 [makerule="_module_$PWD/build"])
66 MODULE_TARGET=$lb_cv_module_target
67 AC_SUBST(MODULE_TARGET)
73 # Determine the Linux kernel version string from the utsrelease
75 AC_DEFUN([LB_LINUX_UTSRELEASE], [
76 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
78 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
79 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
80 utsrelease3=$LINUX_OBJ/include/linux/version.h
81 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
82 [utsrelease=$utsrelease1],
83 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
84 [utsrelease=$utsrelease2],
85 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
86 [utsrelease=$utsrelease3])
87 AS_IF([test -n "$utsrelease"],
88 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
91 Cannot find UTS_RELEASE definition.
93 This is often provided by the kernel-devel package.
97 AS_IF([test -z "$lb_cv_utsrelease"],
98 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
99 LINUXRELEASE=$lb_cv_utsrelease
100 AC_SUBST(LINUXRELEASE)
106 # get the release version of linux
108 AC_DEFUN([LB_LINUX_RELEASE], [
111 # Define default states
116 OPENEULER_KERNEL="no"
117 # And if any of the above kernels has been detected yet
120 # Check for RedHat first (no need to check KERNEL_FOUND
121 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
122 lb_cv_rhel_kernel_version=""
123 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
124 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
125 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
126 '/ RHEL_MINOR / { print [$]3 }' \
127 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
130 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
133 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
137 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
138 LB_CHECK_CONFIG([SUSE_KERNEL], [
145 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
146 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
147 lb_cv_ubuntu_kernel_sig="no"
148 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
149 lb_cv_ubuntu_kernel_sig="yes"
152 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
158 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
159 AC_CACHE_CHECK([for Debian kernel signature], lb_cv_debian_kernel_sig, [
160 lb_cv_debian_kernel_sig="no"
161 AS_IF([grep -q "LINUX_PACKAGE_ID\s*\"\s*Debian" $LINUX_OBJ/include/generated/package.h], [
162 lb_cv_debian_kernel_sig="yes"
165 AS_IF([test "x$lb_cv_debian_kernel_sig" = "xyes"], [
171 # Check for a ELRepo -ml kernel on RHEL 7/8
172 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
173 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
174 lb_cv_mainline_kernel_sig, [
175 lb_cv_mainline_kernel_sig="no"
176 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
177 lb_cv_mainline_kernel_sig="yes"
179 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
180 lb_cv_mainline_kernel_sig="yes"
183 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
189 # Check for openEuler
190 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
191 AC_CACHE_CHECK([for openEuler kernel version number], lb_cv_openeuler_kernel_version, [
192 lb_cv_openeuler_kernel_version=""
193 AS_IF([fgrep -q OPENEULER_VERSION $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
194 lb_cv_openeuler_kernel_version=$(awk '/ OPENEULER_MAJOR / { print [$]3 }' \
195 $LINUX_OBJ/include/$VERSION_HDIR/version.h).$(awk \
196 '/ OPENEULER_MINOR / { print [$]3 }' \
197 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
200 AS_IF([test -n "$lb_cv_openeuler_kernel_version"], [
201 OPENEULER_KERNEL="yes"
203 OPENEULER_VERSION_NO=$lb_cv_openeuler_kernel_version
207 # If still no kernel was found, a warning is issued
208 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
209 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler, Ubuntu nor Debian])
212 AC_MSG_CHECKING([for Linux kernel module package directory])
213 AC_ARG_WITH([kmp-moddir],
214 AS_HELP_STRING([--with-kmp-moddir=string],
215 [set the kmod updates or extra directory]),
218 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
219 [test x$OPENEULER_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
220 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
221 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
222 [test x$DEBIAN_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
223 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, openEuler, Ubuntu nor Debian])]
225 IN_KERNEL="${PACKAGE}"])
226 AC_MSG_RESULT($KMP_MODDIR)
228 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
230 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
231 AC_SUBST(modulefsdir)
233 modulenetdir="${moduledir}/net/${IN_KERNEL}"
234 AC_SUBST(modulenetdir)
240 # LB_LINUX_SYMVERFILE
242 # SLES 9 uses a different name for this file - unsure about vanilla kernels
243 # around this version, but it matters for servers only.
244 AC_DEFUN([LB_LINUX_SYMVERFILE], [
245 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
246 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
247 [lb_cv_module_symvers=Modules.symvers],
248 [lb_cv_module_symvers=Module.symvers])
250 SYMVERFILE=$lb_cv_module_symvers
255 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
257 AC_DEFUN([LB_ARG_REPLACE_PATH], [
259 eval set -- $ac_configure_args
263 arg=--with-[$1]=[$2] ;;
265 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
267 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
268 new_configure_args="$new_configure_args '$arg'"
270 ac_configure_args=$new_configure_args
274 # __LB_ARG_CANON_PATH
276 # this is the work-horse of the next function
278 AC_DEFUN([__LB_ARG_CANON_PATH], [
279 [$3]=$(readlink -f $with_$2)
280 LB_ARG_REPLACE_PATH([$1], $[$3])
286 # a front-end for the above function that transforms - and . in the
287 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
289 AC_DEFUN([LB_ARG_CANON_PATH], [
290 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
296 # Find paths for linux, handling kernel-source rpms
298 AC_DEFUN([LB_LINUX_PATH], [
299 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
300 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
302 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
303 PATHS="/lib/modules/$(uname -r)/build"
305 PATHS="/usr/src/linux-headers-$(uname -r)"
307 PATHS+=" $DEFAULT_LINUX"
308 for DEFAULT_LINUX_OBJ in $PATHS; do
309 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
312 AC_MSG_CHECKING([for Linux sources])
314 AS_HELP_STRING([--with-linux=path],
315 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
316 [LB_ARG_CANON_PATH([linux], [LINUX])
317 DEFAULT_LINUX_OBJ=$LINUX],
318 [LINUX=$DEFAULT_LINUX])
319 AC_MSG_RESULT([$LINUX])
321 # -------- check for linux --------
322 LB_CHECK_FILE([$LINUX], [],
323 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
325 # -------- linux objects (for 2.6) --
326 AC_MSG_CHECKING([for Linux objects])
327 AC_ARG_WITH([linux-obj],
328 AS_HELP_STRING([--with-linux-obj=path],
329 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
330 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
331 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
332 AC_MSG_RESULT([$LINUX_OBJ])
334 ## -------- with linux should point to <kernel>-common on Debian
335 AS_IF([test ${LINUX} == ${LINUX_OBJ} -a ${LINUX} == $(realpath ${LINUX})],[
336 this_arch=$(realpath ${LINUX} | sed 's/-/\n/g' | tail -1)
337 linux_headers_common=$(realpath ${LINUX}|sed "s/-${this_arch}\$/-common/g")
338 AS_IF([test "${this_arch}" != common],[
339 _cah="${linux_headers_common}/include/linux/compiler_attributes.h"
340 _cgh="${linux_headers_common}/include/linux/compiler-gcc.h"
341 AS_IF([test -f "${_cah}" -o -f "${_cgh}"],[
342 AC_MSG_WARN([Setting LINUX to ${linux_headers_common} was ${LINUX}])
343 LINUX=${linux_headers_common}])
348 # -------- check for .config --------
349 AC_ARG_WITH([linux-config],
350 [AS_HELP_STRING([--with-linux-config=path],
351 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
352 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
353 [LINUX_CONFIG=$LINUX_OBJ/.config])
355 # -------- check if .config exists --
356 LB_CHECK_FILE([$LINUX_CONFIG], [],
359 Kernel config could not be found.
362 AC_SUBST(LINUX_CONFIG)
364 LB_CHECK_FILE([/boot/kernel.h],
365 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
366 [LB_CHECK_FILE([/var/adm/running-kernel.h],
367 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
369 AC_ARG_WITH([kernel-source-header],
370 AS_HELP_STRING([--with-kernel-source-header=path],
371 [Use a different kernel version header.]),
372 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
374 # ----------- make dep run? ------------------
375 # at 2.6.19 # $LINUX/include/linux/config.h is removed
376 # and at more old has only one line include <autoconf.h>
378 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
379 [AUTOCONF_HDIR=generated],
380 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
381 [AUTOCONF_HDIR=linux],
382 [AC_MSG_ERROR([Run make config in $LINUX.])])])
383 AC_SUBST(AUTOCONF_HDIR)
385 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
386 [VERSION_HDIR=linux],
387 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
388 [VERSION_HDIR=generated/uapi/linux],
389 [AC_MSG_ERROR([Run make config in $LINUX.])])])
390 AC_SUBST(VERSION_HDIR)
392 # ----------- kconfig.h exists ---------------
393 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
394 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
396 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
397 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
398 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
399 AC_SUBST(CONFIG_INCLUDE)
401 # ------------ rhconfig.h includes runtime-generated bits --
402 # RedHat kernel-source checks
404 # we know this exists after the check above. if the user
405 # tarred up the tree and ran make dep etc. in it, then
406 # version.h gets overwritten with a standard linux one.
408 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
409 # This is a clean kernel-source tree, we need to
410 # enable extensive workarounds to get this to build modules
411 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
412 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
415 Using /boot/kernel.h from RUNNING kernel.
417 If this is not what you want, use --with-kernel-source-header.
418 Consult build/README.kernel-source for details.
423 $KERNEL_SOURCE_HEADER not found.
425 Consult build/README.kernel-source for details.
428 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
431 AS_IF([test -n SUBARCH],
432 [SUBARCH=$(echo $target_cpu | sed -e 's/powerpc.*/powerpc/' -e 's/ppc.*/powerpc/' -e 's/x86_64/x86/' -e 's/i.86/x86/' -e 's/k1om/x86/' -e 's/aarch64.*/arm64/' -e 's/armv7.*/arm/')
435 # this is needed before we can build modules
438 # --- Parallel config for kernel v5.17+
439 AS_IF([test "x$lb_cv_dequote_CC_VERSION_TEXT" = "xyes"], [
440 CC_VERSION_TEXT=$($CC --version | head -n1 | tr ' ()' '.')
441 MAKE_KMOD_ENV="CONFIG_CC_VERSION_TEXT='$CC_VERSION_TEXT'"])
443 # --- check that we can build modules at all
444 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
448 Kernel modules cannot be built. Consult config.log for details.
450 If you are trying to build with a kernel-source rpm,
451 consult build/README.kernel-source
456 ]) # end of LB_LINUX_PATH
461 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
462 # so we test if request_module is implemented or not
463 AC_DEFUN([LC_MODULE_LOADING], [
464 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
466 #include <linux/kmod.h>
468 int myretval=ENOSYS ;
471 $makerule LUSTRE_KERNEL_TEST=conftest.i
473 grep request_module build/conftest.i |dnl
474 grep -v `grep "int myretval=" build/conftest.i |dnl
475 cut -d= -f2 | cut -d" " -f1`dnl
477 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
479 AS_IF([test "$lb_cv_module_loading" = yes],
480 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
481 [kernel module loading is possible])],
484 Kernel module loading support is highly recommended.
490 AC_DEFUN([LB_PROG_LINUX_SRC], [
491 LB2_SRC_CHECK_CONFIG([MODULES])
492 LB2_SRC_CHECK_CONFIG([MODVERSIONS])
495 AC_DEFUN([LB_PROG_LINUX_RESULTS], [
496 LB2_TEST_CHECK_CONFIG([MODULES], [], [AC_MSG_ERROR(
497 [module support is required to build Lustre kernel modules.])
499 LB2_TEST_CHECK_CONFIG([MODVERSIONS],[],[])
507 AC_DEFUN([LB_PROG_LINUX], [
517 # Determine if the target is a dpkg system or rpm
519 AC_DEFUN([LB_USES_DPKG], [
520 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
522 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
524 uses_dpkg=$lb_cv_uses_dpkg
530 # check symbol exported or not
532 # $2 - file(s) for find.
536 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
538 AC_DEFUN([LB_CHECK_EXPORT], [
539 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
540 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
541 AS_VAR_SET([lb_export], [no])
542 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
543 [AS_VAR_SET([lb_export], [yes])],
545 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
546 AS_VAR_SET([lb_export], [yes])
551 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
552 AS_VAR_POPDEF([lb_export])dnl
558 # check if a given config option is defined
563 AC_DEFUN([LB_CHECK_CONFIG], [
564 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
566 #include <$AUTOCONF_HDIR/autoconf.h>
569 #error CONFIG_$1 not #defined
577 # check if a given config option is builtin or as module
578 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
582 AC_DEFUN([LB_CHECK_CONFIG_IM], [
583 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
585 #include <$AUTOCONF_HDIR/autoconf.h>
587 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
588 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
591 ]) # LB_CHECK_CONFIG_IM
594 # these are like AC_TRY_COMPILE, but try to build modules against the
595 # kernel, inside the build directory
599 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
600 # --------------------------------------
602 m4_define([LB_LANG_PROGRAM],
604 #include <linux/kernel.h>
605 #include <linux/module.h>
607 #if defined(NEED_LOCKDEP_IS_HELD_DISCARD_CONST) \
608 && defined(CONFIG_LOCKDEP) \
609 && defined(lockdep_is_held)
610 #undef lockdep_is_held
611 #define lockdep_is_held(lock) \
612 lock_is_held((struct lockdep_map *)&(lock)->dep_map)
619 dnl Do *not* indent the following line: there may be CPP directives.
620 dnl Don't move the `;' right after for the same reason.
625 MODULE_LICENSE("GPL");])
628 # LB_LINUX_COMPILE_IFELSE
630 # like AC_COMPILE_IFELSE
632 # $1 - AC_LANG_SOURCE()
638 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
639 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
640 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
641 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] DEQUOTE_CC_VERSION_TEXT=$lb_cv_dequote_CC_VERSION_TEXT LDFLAGS= ${LD:+LD="$LD"} CC="$CC" -f $PWD/build/Makefile LUSTRE_LINUX_CONFIG=$LINUX_CONFIG LINUXINCLUDE="$EXTRA_CHECK_INCLUDE -I$LINUX/arch/$SUBARCH/include -Iinclude -Iarch/$SUBARCH/include/generated -I$LINUX/include -Iinclude2 -I$LINUX/include/uapi -Iinclude/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/include } ${ZFS:+-I$ZFS -I$ZFS/include -I$ZFS/include/os/linux/kernel -I$ZFS/include/os/linux/spl -I$ZFS/include/os/linux/zfs -I${SPL:-$ZFS/include/spl}} -include $CONFIG_INCLUDE" KBUILD_EXTRA_SYMBOLS="${ZFS_OBJ:+$ZFS_OBJ/Module.symvers} $KBUILD_EXTRA_SYMBOLS" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $MODULE_TARGET=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
643 [_AC_MSG_LOG_CONFTEST
644 m4_ifvaln([$5],[$5])dnl])
645 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
649 # LB_LINUX_TRY_COMPILE
651 # like AC_TRY_COMPILE
653 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
654 LB_LINUX_COMPILE_IFELSE(
655 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
656 [modules], [test -s build/conftest.o],
663 # like LB_LINUX_TRY_COMPILE, but with different arguments
665 AC_DEFUN([LB_LINUX_TRY_MAKE], [
666 LB_LINUX_COMPILE_IFELSE(
667 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
668 [$3], [$4], [$5], [$6])
673 # $1 - checking message
680 AC_DEFUN([LB_CHECK_COMPILE], [
681 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
682 AC_CACHE_CHECK([$1], lb_compile, [
683 LB_LINUX_TRY_COMPILE([$3], [$4],
684 [AS_VAR_SET([lb_compile], [yes])],
685 [AS_VAR_SET([lb_compile], [no])])
687 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
688 AS_VAR_POPDEF([lb_compile])dnl
689 ]) # LB_CHECK_COMPILE
692 # LB_CHECK_LINUX_HEADER
694 # Like AC_CHECK_HEADER but checks for a kernel-space header
696 AC_DEFUN([LB_CHECK_LINUX_HEADER], [
697 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])
698 AC_CACHE_CHECK([for $1], lb_header, [
699 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
700 [modules], [test -s build/conftest.o],
701 [AS_VAR_SET([lb_header], [yes])],
702 [AS_VAR_SET([lb_header], [no])])
704 AS_VAR_IF([lb_header], [yes], [$2], [$3])
705 AS_VAR_POPDEF([lb_header])
706 ]) # LB_CHECK_LINUX_HEADER
708 # ------------------------------------------------------------------------------
709 # Support 2 stage: parallel compile then checked test results
710 # Heavily inspired by OpenZFS
712 # When converting tests from an LB_CHECK_COMPILE to use an
713 # LB2_LINUX_TEST_SRC and LB2_LINUX_TEST_RESULT pairing the primary
714 # consideration if dependencies on the results of LB2_LINUX_TEST_RESULT
715 # or LB2_TEST_CHECK_CONFIG[_IM] are used by annother compile test.
716 # Such dependencies should be avoided without a clear understanding
717 # of when the test result is actually available.
718 # The serial LB_CHECK_* test produces immediate results
719 # where as the LB2_ variant is not available until an intermediate
720 # LB2_LINUX_TEST_COMPILE_ALL has been executed.
722 # Currently all of the non-conditional LB_CHECK_COMPILE and
723 # LB_CHECK_CONFIG[_IM] cases are executed before any of the
724 # LB2_LINUX_TEST_SRC, or LB2_SRC_CHECK_CONFIG[_IM] code snippets
725 # are written. [Reference LB_CONFIG_MODULES for more details]
727 # This allows such LB2_*_SRC_* test cases to rely on
728 # prior LB_CHECK_* results, provided such results are preserved
729 # in the global configure name space. Likewise an LB2_LINUX_TEST_RESULT
730 # or LB2_TEST_CHECK_CONFIG[_IM] may conditionally execute a further
731 # LB_CHECK_* if required. Although it would be typcially be faster
732 # to run a few compile tests and conditionally ignore the results
733 # the reduced configure time may not always out weight the added
736 # It is worth noting that the LB_CHECK_COMPILE macros second argument
737 # is used as the configure test cache name. While is has been important
738 # that this name be globally unique it is even more important in the
739 # parallel case. The is somewhat alleviated by the sanity check in the
740 # LB2_LINUX_TEST_RESULT macro as it will abort with an error if
741 # the cache name does not exist. However care should be taken
742 # that the cache name is a globally unique identifier.
744 # Non-unique cases that are otherwise correct can be identified in the
745 # configure output when a results include ".. (cached)". This indicates
746 # either a duplicate LB_CHECK_* execution which is not critical or a
747 # duplicate identifier which needs to be corrected.
749 # At this point the number of LB_ and LB2_ examples should be
750 # sufficient for the casual developer to perform cut-paste-modify
751 # without serious confusion or complication.
752 # ------------------------------------------------------------------------------
754 AC_DEFUN([LB2_LINUX_CONFTEST_C], [
755 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
756 test -d ${TEST_DIR}/$2 || mkdir -p ${TEST_DIR}/$2
757 cat confdefs.h - <<_EOF >${TEST_DIR}/$2/$2.c
763 # LB2_LINUX_CONFTEST_MAKEFILE
765 # $1 - *unique* test case name
766 # $2 - additional build flags (ccflags)
767 # $3 - external kernel includes for lnet o2ib|gni
768 # $4 - extra symbol in Psuedo.symvers (optional)
770 AC_DEFUN([LB2_LINUX_CONFTEST_MAKEFILE], [
771 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
772 test -d ${TEST_DIR} || mkdir -p ${TEST_DIR}
773 test -d ${TEST_DIR}/$1 || mkdir -p ${TEST_DIR}/$1
775 file=${TEST_DIR}/$1/Makefile
779 if test "${EXT_SYMBOL}x" != "x" ; then
780 PSYM_FILE=${TEST_DIR}/$1/Psuedo.symvers
781 echo -e "0x12345678\t${EXT_SYMBOL}\tvmlinux\tEXPORT_SYMBOL\t" > ${PSYM_FILE}
784 if test "x$O2IBPATH" != "x"; then
785 if test "x$O2IBPATH" != "x$LINUX_OBJ"; then
786 XTRA_SYM="$O2IBPATH/Module.symvers"
791 # Example command line to manually build source
792 # make modules -C $LINUX_OBJ $ARCH_UM M=${TEST_DIR}/$1 $MAKE_KMOD_ENV
802 LINUXINCLUDE = $EXT_INCLUDE
803 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include
804 LINUXINCLUDE += -Iinclude -Iarch/$SUBARCH/include/generated
805 LINUXINCLUDE += -I$LINUX/include
806 LINUXINCLUDE += -Iinclude2
807 LINUXINCLUDE += -I$LINUX/include/uapi
808 LINUXINCLUDE += -Iinclude/generated
809 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include/uapi
810 LINUXINCLUDE += -Iarch/$SUBARCH/include/generated/uapi
811 LINUXINCLUDE += -I$LINUX/include/uapi -Iinclude/generated/uapi
813 LINUXINCLUDE += -include \$(SOBJ)/spl_config.h
816 LINUXINCLUDE += -include \$(ZOBJ)/zfs_config.h
819 LINUXINCLUDE += -I\$(SINC)/include
822 LINUXINCLUDE += -I\$(ZINC) -I\$(ZINC)/include
824 LINUXINCLUDE += -I\$(SINC)
826 LINUXINCLUDE += -I\$(ZINC)/include/spl
829 LINUXINCLUDE += -include $CONFIG_INCLUDE
830 KBUILD_EXTRA_SYMBOLS += ${ZFS_OBJ:+$ZFS_OBJ/Module.symvers}
831 KBUILD_EXTRA_SYMBOLS += ${XTRA_SYM}
833 KBUILD_EXTRA_SYMBOLS += \$(PSYM)
836 ccflags-y := -Werror-implicit-function-declaration
839 # Additional custom CFLAGS as requested.
840 m4_ifval($2, [echo "ccflags-y += $2" >>$file], [])
843 echo "obj-m := $1.o" >>$file
844 echo "obj-m += $1/" >>${TEST_DIR}/Makefile
848 # LB2_LINUX_TEST_COMPILE
850 # Perform a full compile excluding the final modpost phase.
854 AC_DEFUN([LB2_LINUX_TEST_COMPILE], [
857 J=${TEST_JOBS:-$(nproc)}
859 AC_MSG_NOTICE([Making $1 in $D])
860 AC_MSG_NOTICE([KBUILD_MODPOST_NOFINAL="yes" make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV])
862 AC_TRY_COMMAND([KBUILD_MODPOST_NOFINAL="yes"
863 make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} $MAKE_KMOD_ENV >${L} 2>&1])
864 AS_IF([test -f ${L}],
865 [AS_IF([test -f $2/Makefile],
866 [mv $2/Makefile $2/Makefile.compile.$1])],
867 [AC_MSG_ERROR([*** Unable to compile test source ... $3])
872 # Perform the compilation of the test cases in two phases.
874 # Phase 1) attempt to build the object files for all of the tests
875 # defined by the LB2_LINUX_TEST_SRC macro.
877 # Phase 2) disable all tests which failed the initial compilation.
879 # This allows us efficiently build the test cases in parallel while
880 # remaining resilient to build failures which are expected when
881 # detecting the available kernel interfaces.
883 # The maximum allowed parallelism can be controlled by setting the
884 # TEST_JOBS environment variable which defaults to $(nproc).
886 AC_DEFUN([LB2_LINUX_TEST_COMPILE_ALL], [
887 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
888 # Phase 1 - Compilation only, final linking is skipped.
889 LB2_LINUX_TEST_COMPILE([$1], [${TEST_DIR}], [$2])
890 for dir in $(awk '/^obj-m/ { print [$]3 }' \
891 ${TEST_DIR}/Makefile.compile.$1); do
893 touch ${TEST_DIR}/$name/$name.tested
904 # $5 - external include paths
905 # $6 - fake symvers entry
907 # NOTICE as all of the test cases are compiled in parallel tests may not
908 # depend on the results other tests.
909 # Each test needs resolve any external dependencies at the time the program
910 # source is generated.
912 AC_DEFUN([LB2_LINUX_TEST_SRC], [
913 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
914 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$1])
915 # Skip test write and build steps if the result is already known.
916 LB2_LINUX_CONFTEST_C([LB_LANG_PROGRAM([[$2]], [[$3]])], [$1_pc])
917 LB2_LINUX_CONFTEST_MAKEFILE([$1_pc], [$4], [$5], [$6])
918 AS_VAR_POPDEF([lb_test])
922 # LB2_LINUX_TEST_RESULT
924 # $1 - *unique* name matching the LB2_LINUX_TEST_SRC macro
925 # $2 - run on success (valid .ko generated)
926 # $3 - run on failure (unable to compile)
929 AC_DEFUN([LB2_LINUX_TEST_RESULT],[
930 TEST_DIR=${TEST_DIR:-${ac_pwd}/_lpb}
931 AS_VAR_PUSHDEF([lb_test], [lb_cv_test_$1])
932 D="$(realpath ${TEST_DIR})"
935 AS_IF([test -d ${T}], [
936 # test source exists, was the compile test run?
937 AS_IF([test -f ${O}.tested],[
938 # compile test was run.
940 # compile test was NOT run. Re-compile everything.
941 AC_MSG_NOTICE([** Rebuilding all tests **])
943 J=${TEST_JOBS:-$(nproc)}
944 for mf in $(ls -1 ${TEST_DIR}/Makefile.compile.*); do
945 ln -sf $mf ${D}/Makefile
946 KBUILD_MODPOST_NOFINAL="yes"
947 make modules CC="$CC" -k -j${J} -C $LINUX_OBJ $ARCH_UM M=${D} >> rebuild.log 2>&1
949 for dir in $(awk '/^obj-m/ { print [$]3 }' ${D}/$mf); do
951 AC_MSG_NOTICE([touch ${D}/$name/$name.tested])
952 touch ${D}/$name/$name.tested
956 # compile test was NOT run. Re-compile everything.
959 # test source does not exist:
961 *** No matching source for the "$1" test, check that
962 *** both the test source and result macros refer to the same name.
965 # Abort if key does not exist
966 AS_IF([test -f ${O}.tested], [],
967 [AC_MSG_ERROR([*** Compile test for $1 was not run.])])
968 # Default is to expect only the <module>.o be generated.
970 # Require the <module>.ko file when "module" is passed
971 AS_IF([test "X'$4'" == "X'module'"], [NEED_KO=1])
972 # If test was compiled and if we got an object ...
973 AS_IF([test ${NEED_KO} -eq 0], [AS_IF([test ! -f ${O}.ko], [AS_IF(
974 [test -f ${O}.o], [touch ${O}.ko])])])
975 # key is valid. Cache should be valid, set the variable
976 AC_CACHE_CHECK([for $1], lb_test,
977 AS_IF([test -f ${O}.ko],
978 AS_VAR_SET([lb_test], [yes]),
979 AS_VAR_SET([lb_test], [no])))
980 # Read the variable and run the caller's actions for yes (arg2) or no (arg3)
981 AS_VAR_IF([lb_test], [yes], $2, $3)
982 AS_VAR_POPDEF([lb_test])
983 ]) # LB2_LINUX_TEST_RESULT
986 # LB2_SRC_CHECK_CONFIG
988 # generate source to check if a given config option is defined
992 AC_DEFUN([LB2_SRC_CHECK_CONFIG], [
993 LB2_LINUX_TEST_SRC([config_$1], [
994 #include <$AUTOCONF_HDIR/autoconf.h>
997 #error CONFIG_$1 not #defined
1000 ]) # LB2_SRC_CHECK_CONFIG
1003 # LB2_TEST_CHECK_CONFIG
1005 # test result compile test from LB2_SRC_CHECK_CONFIG
1007 # $1 - CONFIG_<name>
1011 AC_DEFUN([LB2_TEST_CHECK_CONFIG], [
1012 AC_MSG_CHECKING([if Linux kernel was built with CONFIG_$1])
1013 LB2_LINUX_TEST_RESULT([config_$1], [
1018 ]) # LB2_TEST_CHECK_CONFIG
1021 # LB2_SRC_CHECK_CONFIG_IM
1023 # generate source to check if a given config option is defined as built-in
1026 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
1028 AC_DEFUN([LB2_SRC_CHECK_CONFIG_IM], [
1029 LB2_LINUX_TEST_SRC([config_im_$1], [
1030 #include <$AUTOCONF_HDIR/autoconf.h>
1032 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
1033 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
1036 ]) # LB2_SRC_CHECK_CONFIG_IM
1040 # LB2_TEST_CHECK_CONFIG_IM
1042 # test result compile test from LB2_SRC_CHECK_CONFIG_IM
1044 # $1 - CONFIG_<name>
1048 AC_DEFUN([LB2_TEST_CHECK_CONFIG_IM], [
1049 AC_MSG_CHECKING([if Linux kernel enabled CONFIG_$1 as built-in or module])
1050 LB2_LINUX_TEST_RESULT([config_im_$1], [
1055 ]) # LB2_TEST_CHECK_CONFIG_IM