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 MODULE_TARGET="SUBDIRS"
15 rm -f build/conftest.i
16 LB_LINUX_TRY_MAKE([], [],
17 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
18 [test -s build/conftest.i],
19 [lb_cv_module_target="SUBDIRS"],[
21 makerule="$PWD/build/"
22 LB_LINUX_TRY_MAKE([], [],
23 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
24 [test -s build/conftest.i],
25 [lb_cv_module_target="M54"], [
27 makerule="_module_$PWD/build"
28 LB_LINUX_TRY_MAKE([], [],
29 [$makerule LUSTRE_KERNEL_TEST=conftest.i],
30 [test -s build/conftest.i],
31 [lb_cv_module_target="M"], [
32 AC_MSG_ERROR([kernel module make failed; check config.log for details])
35 AS_IF([test -z "$lb_cv_module_target"],
36 [AC_MSG_ERROR([unknown external module build target])],
37 [test "x$lb_cv_module_target" = "xM54"],
38 [makerule="$PWD/build"
39 lb_cv_module_target="M"],
40 [test "x$lb_cv_module_target" = "xM"],
41 [makerule="_module_$PWD/build"])
42 MODULE_TARGET=$lb_cv_module_target
43 AC_SUBST(MODULE_TARGET)
49 # Determine the Linux kernel version string from the utsrelease
51 AC_DEFUN([LB_LINUX_UTSRELEASE], [
52 AC_CACHE_CHECK([for Linux kernel utsrelease], lb_cv_utsrelease, [
54 utsrelease1=$LINUX_OBJ/include/generated/utsrelease.h
55 utsrelease2=$LINUX_OBJ/include/linux/utsrelease.h
56 utsrelease3=$LINUX_OBJ/include/linux/version.h
57 AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1],
58 [utsrelease=$utsrelease1],
59 [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2],
60 [utsrelease=$utsrelease2],
61 [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3],
62 [utsrelease=$utsrelease3])
63 AS_IF([test -n "$utsrelease"],
64 [lb_cv_utsrelease=$(awk -F \" '/ UTS_RELEASE / { print [$]2 }' $utsrelease)],
67 Cannot find UTS_RELEASE definition.
69 This is often provided by the kernel-devel package.
73 AS_IF([test -z "$lb_cv_utsrelease"],
74 [AC_MSG_ERROR([Cannot determine Linux kernel version.])])
75 LINUXRELEASE=$lb_cv_utsrelease
76 AC_SUBST(LINUXRELEASE)
82 # get the release version of linux
84 AC_DEFUN([LB_LINUX_RELEASE], [
87 # Define default states
92 # And if any of the above kernels has been detected yet
95 # Check for RedHat first (no need to check KERNEL_FOUND
96 AC_CACHE_CHECK([for RedHat kernel release number], lb_cv_rhel_kernel_version, [
97 lb_cv_rhel_kernel_version=""
98 AS_IF([fgrep -q RHEL_RELEASE $LINUX_OBJ/include/$VERSION_HDIR/version.h], [
99 lb_cv_rhel_kernel_version=$(awk '/ RHEL_MAJOR / { print [$]3 }' \
100 $LINUX_OBJ/include/$VERSION_HDIR/version.h)$(awk \
101 '/ RHEL_MINOR / { print [$]3 }' \
102 $LINUX_OBJ/include/$VERSION_HDIR/version.h)
105 AS_IF([test -n "$lb_cv_rhel_kernel_version"], [
108 RHEL_RELEASE_NO=$lb_cv_rhel_kernel_version
112 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
113 LB_CHECK_CONFIG([SUSE_KERNEL], [
120 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
121 AC_CACHE_CHECK([for Ubuntu kernel signature], lb_cv_ubuntu_kernel_sig, [
122 lb_cv_ubuntu_kernel_sig="no"
123 AS_IF([fgrep -q "CONFIG_VERSION_SIGNATURE \"Ubuntu" $LINUX_OBJ/include/generated/autoconf.h], [
124 lb_cv_ubuntu_kernel_sig="yes"
127 AS_IF([test "x$lb_cv_ubuntu_kernel_sig" = "xyes"], [
134 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
135 AC_CACHE_CHECK([for Debian kernel signature], lb_cv_debian_kernel_sig, [
136 lb_cv_debian_kernel_sig="no"
137 AS_IF([grep -q "LINUX_PACKAGE_ID\s*\"\s*Debian" $LINUX_OBJ/include/generated/package.h], [
138 lb_cv_debian_kernel_sig="yes"
141 AS_IF([test "x$lb_cv_debian_kernel_sig" = "xyes"], [
147 # Check for a ELRepo -ml kernel on RHEL 7/8
148 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
149 AC_CACHE_CHECK([for ELRepo -ml kernel signature on CentOS],
150 lb_cv_mainline_kernel_sig, [
151 lb_cv_mainline_kernel_sig="no"
152 AS_IF([fgrep -q '.el7.' $LINUX_OBJ/include/generated/utsrelease.h], [
153 lb_cv_mainline_kernel_sig="yes"
155 AS_IF([fgrep -q '.el8.' $LINUX_OBJ/include/generated/utsrelease.h], [
156 lb_cv_mainline_kernel_sig="yes"
159 AS_IF([test "x$lb_cv_mainline_kernel_sig" = "xyes"], [
165 # If still no kernel was found, a warning is issued
166 AS_IF([test "x$KERNEL_FOUND" = "xno"], [
167 AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, Ubuntu nor Debian])
170 AC_MSG_CHECKING([for Linux kernel module package directory])
171 AC_ARG_WITH([kmp-moddir],
172 AC_HELP_STRING([--with-kmp-moddir=string],
173 [set the kmod updates or extra directory]),
176 AS_IF([test x$RHEL_KERNEL = xyes], [KMP_MODDIR="extra/kernel"],
177 [test x$SUSE_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
178 [test x$UBUNTU_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
179 [test x$DEBIAN_KERNEL = xyes], [KMP_MODDIR="updates/kernel"],
180 [AC_MSG_WARN([Kernel Distro seems to be neither RedHat, SuSE, Ubuntu nor Debian])]
182 IN_KERNEL="${PACKAGE}"])
183 AC_MSG_RESULT($KMP_MODDIR)
185 moduledir="/lib/modules/${LINUXRELEASE}/${KMP_MODDIR}"
187 modulefsdir="${moduledir}/fs/${IN_KERNEL}"
188 AC_SUBST(modulefsdir)
190 modulenetdir="${moduledir}/net/${IN_KERNEL}"
191 AC_SUBST(modulenetdir)
197 # LB_LINUX_SYMVERFILE
199 # SLES 9 uses a different name for this file - unsure about vanilla kernels
200 # around this version, but it matters for servers only.
201 AC_DEFUN([LB_LINUX_SYMVERFILE], [
202 AC_CACHE_CHECK([for the name of module symbol version file], lb_cv_module_symvers, [
203 AS_IF([grep -q Modules.symvers $LINUX/scripts/Makefile.modpost],
204 [lb_cv_module_symvers=Modules.symvers],
205 [lb_cv_module_symvers=Module.symvers])
207 SYMVERFILE=$lb_cv_module_symvers
212 # LB_ARG_REPLACE_PATH(PACKAGE, PATH)
214 AC_DEFUN([LB_ARG_REPLACE_PATH], [
216 eval set -- $ac_configure_args
220 arg=--with-[$1]=[$2] ;;
222 arg=$(printf %s\n ["$arg"] | sed "s/'/'\\\\\\\\''/g") ;;
224 dnl AS_VAR_APPEND([new_configure_args], [" '$arg'"])
225 new_configure_args="$new_configure_args '$arg'"
227 ac_configure_args=$new_configure_args
231 # __LB_ARG_CANON_PATH
233 # this is the work-horse of the next function
235 AC_DEFUN([__LB_ARG_CANON_PATH], [
236 [$3]=$(readlink -f $with_$2)
237 LB_ARG_REPLACE_PATH([$1], $[$3])
243 # a front-end for the above function that transforms - and . in the
244 # PACKAGE portion of --with-PACKAGE into _ suitable for variable names
246 AC_DEFUN([LB_ARG_CANON_PATH], [
247 __LB_ARG_CANON_PATH([$1], m4_translit([$1], [-.], [__]), [$2])
253 # Find paths for linux, handling kernel-source rpms
255 AC_DEFUN([LB_LINUX_PATH], [
256 for DEFAULT_LINUX in /usr/src/linux-source-* /lib/modules/$(uname -r)/{source,build} /usr/src/linux* $(find /usr/src/kernels/ -maxdepth 1 -name @<:@0-9@:>@\* | xargs -r ls -d | tail -n 1); do
257 AS_IF([readlink -q -e $DEFAULT_LINUX >/dev/null], [break])
259 if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
260 PATHS="/lib/modules/$(uname -r)/build"
262 PATHS="/usr/src/linux-headers-$(uname -r)"
264 PATHS+=" $DEFAULT_LINUX"
265 for DEFAULT_LINUX_OBJ in $PATHS; do
266 AS_IF([readlink -q -e $DEFAULT_LINUX_OBJ >/dev/null], [break])
269 AC_MSG_CHECKING([for Linux sources])
271 AC_HELP_STRING([--with-linux=path],
272 [set path to Linux source (default=/lib/modules/$(uname -r)/{source,build},/usr/src/linux)]),
273 [LB_ARG_CANON_PATH([linux], [LINUX])
274 DEFAULT_LINUX_OBJ=$LINUX],
275 [LINUX=$DEFAULT_LINUX])
276 AC_MSG_RESULT([$LINUX])
279 # -------- check for linux --------
280 LB_CHECK_FILE([$LINUX], [],
281 [AC_MSG_ERROR([Kernel source $LINUX could not be found.])])
283 # -------- linux objects (for 2.6) --
284 AC_MSG_CHECKING([for Linux objects])
285 AC_ARG_WITH([linux-obj],
286 AC_HELP_STRING([--with-linux-obj=path],
287 [set path to Linux objects (default=/lib/modules/$(uname -r)/build,/usr/src/linux)]),
288 [LB_ARG_CANON_PATH([linux-obj], [LINUX_OBJ])],
289 [LINUX_OBJ=$DEFAULT_LINUX_OBJ])
290 AC_MSG_RESULT([$LINUX_OBJ])
293 # -------- check for .config --------
294 AC_ARG_WITH([linux-config],
295 [AC_HELP_STRING([--with-linux-config=path],
296 [set path to Linux .conf (default=$LINUX_OBJ/.config)])],
297 [LB_ARG_CANON_PATH([linux-config], [LINUX_CONFIG])],
298 [LINUX_CONFIG=$LINUX_OBJ/.config])
300 # -------- check if .config exists --
301 LB_CHECK_FILE([$LINUX_CONFIG], [],
304 Kernel config could not be found.
307 AC_SUBST(LINUX_CONFIG)
309 LB_CHECK_FILE([/boot/kernel.h],
310 [KERNEL_SOURCE_HEADER='/boot/kernel.h'],
311 [LB_CHECK_FILE([/var/adm/running-kernel.h],
312 [KERNEL_SOURCE_HEADER='/var/adm/running-kernel.h'])])
314 AC_ARG_WITH([kernel-source-header],
315 AC_HELP_STRING([--with-kernel-source-header=path],
316 [Use a different kernel version header.]),
317 [LB_ARG_CANON_PATH([kernel-source-header], [KERNEL_SOURCE_HEADER])])
319 # ----------- make dep run? ------------------
320 # at 2.6.19 # $LINUX/include/linux/config.h is removed
321 # and at more old has only one line include <autoconf.h>
323 LB_CHECK_FILE([$LINUX_OBJ/include/generated/autoconf.h],
324 [AUTOCONF_HDIR=generated],
325 [LB_CHECK_FILE([$LINUX_OBJ/include/linux/autoconf.h],
326 [AUTOCONF_HDIR=linux],
327 [AC_MSG_ERROR([Run make config in $LINUX.])])])
328 AC_SUBST(AUTOCONF_HDIR)
330 LB_CHECK_FILE([$LINUX_OBJ/include/linux/version.h],
331 [VERSION_HDIR=linux],
332 [LB_CHECK_FILE([$LINUX_OBJ/include/generated/uapi/linux/version.h],
333 [VERSION_HDIR=generated/uapi/linux],
334 [AC_MSG_ERROR([Run make config in $LINUX.])])])
335 AC_SUBST(VERSION_HDIR)
337 # ----------- kconfig.h exists ---------------
338 # kernel 3.1, $LINUX/include/linux/kconfig.h is added
339 # see kernel commit 2a11c8ea20bf850b3a2c60db8c2e7497d28aba99
341 LB_CHECK_FILE([$LINUX/include/linux/kconfig.h],
342 [CONFIG_INCLUDE=$LINUX/include/linux/kconfig.h],
343 [CONFIG_INCLUDE=include/$AUTOCONF_HDIR/autoconf.h])
344 AC_SUBST(CONFIG_INCLUDE)
346 # ------------ rhconfig.h includes runtime-generated bits --
347 # RedHat kernel-source checks
349 # we know this exists after the check above. if the user
350 # tarred up the tree and ran make dep etc. in it, then
351 # version.h gets overwritten with a standard linux one.
353 AS_IF([grep rhconfig $LINUX_OBJ/include/$VERSION_HDIR/version.h >/dev/null], [
354 # This is a clean kernel-source tree, we need to
355 # enable extensive workarounds to get this to build modules
356 LB_CHECK_FILE([$KERNEL_SOURCE_HEADER], [
357 AS_IF([test $KERNEL_SOURCE_HEADER = '/boot/kernel.h'],
360 Using /boot/kernel.h from RUNNING kernel.
362 If this is not what you want, use --with-kernel-source-header.
363 Consult build/README.kernel-source for details.
368 $KERNEL_SOURCE_HEADER not found.
370 Consult build/README.kernel-source for details.
373 EXTRA_KCFLAGS="-include $KERNEL_SOURCE_HEADER $EXTRA_KCFLAGS"
376 # this is needed before we can build modules
379 # --- check that we can build modules at all
380 LB_CHECK_COMPILE([that modules can be built at all], build_modules,
384 Kernel modules cannot be built. Consult config.log for details.
386 If you are trying to build with a kernel-source rpm,
387 consult build/README.kernel-source
392 ]) # end of LB_LINUX_PATH
397 # after 2.6.28 CONFIG_KMOD is removed, and only CONFIG_MODULES remains
398 # so we test if request_module is implemented or not
399 AC_DEFUN([LC_MODULE_LOADING], [
400 AC_CACHE_CHECK([if Linux kernel module loading is possible], lb_cv_module_loading, [
402 #include <linux/kmod.h>
404 int myretval=ENOSYS ;
407 $makerule LUSTRE_KERNEL_TEST=conftest.i
409 grep request_module build/conftest.i |dnl
410 grep -v `grep "int myretval=" build/conftest.i |dnl
411 cut -d= -f2 | cut -d" " -f1`dnl
413 ], [lb_cv_module_loading="yes"], [lb_cv_module_loading="no"])
415 AS_IF([test "$lb_cv_module_loading" = yes],
416 [AC_DEFINE(HAVE_MODULE_LOADING_SUPPORT, 1,
417 [kernel module loading is possible])],
420 Kernel module loading support is highly recommended.
431 AC_DEFUN([LB_PROG_LINUX], [
435 LB_CHECK_CONFIG([MODULES], [], [
438 module support is required to build Lustre kernel modules.
442 LB_CHECK_CONFIG([MODVERSIONS])
444 LB_CHECK_CONFIG([KALLSYMS], [], [
447 Lustre requires that CONFIG_KALLSYMS is enabled in your kernel.
458 # Determine if the target is a dpkg system or rpm
460 AC_DEFUN([LB_USES_DPKG], [
461 AC_CACHE_CHECK([if this distro uses dpkg], lb_cv_uses_dpkg, [
463 AS_CASE([$(which dpkg 2>/dev/null)],[*/dpkg], [lb_cv_uses_dpkg="yes"])
465 uses_dpkg=$lb_cv_uses_dpkg
471 # check symbol exported or not
473 # $2 - file(s) for find.
477 # 2.6 based kernels - put modversion info into $LINUX/Module.modvers or check
479 AC_DEFUN([LB_CHECK_EXPORT], [
480 AS_VAR_PUSHDEF([lb_export], [lb_cv_export_$1])dnl
481 AC_CACHE_CHECK([if Linux kernel exports '$1'], lb_export, [
482 AS_VAR_SET([lb_export], [no])
483 AS_IF([grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX_OBJ/$SYMVERFILE 2>/dev/null],
484 [AS_VAR_SET([lb_export], [yes])],
486 AS_IF([grep -q -E "EXPORT_SYMBOL.*\($1\)" "$LINUX/$file" 2>/dev/null], [
487 AS_VAR_SET([lb_export], [yes])
492 AS_VAR_IF([lb_export], [yes], [$3], [$4])[]dnl
493 AS_VAR_POPDEF([lb_export])dnl
499 # check if a given config option is defined
504 AC_DEFUN([LB_CHECK_CONFIG], [
505 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1],
507 #include <$AUTOCONF_HDIR/autoconf.h>
510 #error CONFIG_$1 not #defined
518 # check if a given config option is builtin or as module
519 # $1 - CONFIG_<name> or CONFIG_<name>_MODULE
523 AC_DEFUN([LB_CHECK_CONFIG_IM], [
524 LB_CHECK_COMPILE([if Linux kernel was built with CONFIG_$1 in or as module],
526 #include <$AUTOCONF_HDIR/autoconf.h>
528 #if !(defined(CONFIG_$1) || defined(CONFIG_$1_MODULE))
529 #error CONFIG_$1 and CONFIG_$1_MODULE not #defined
532 ]) # LB_CHECK_CONFIG_IM
535 # these are like AC_TRY_COMPILE, but try to build modules against the
536 # kernel, inside the build directory
540 # LB_LANG_PROGRAM(C)([PROLOGUE], [BODY])
541 # --------------------------------------
543 m4_define([LB_LANG_PROGRAM],
545 #include <linux/kernel.h>
546 #include <linux/module.h>
548 #if defined(NEED_LOCKDEP_IS_HELD_DISCARD_CONST) \
549 && defined(CONFIG_LOCKDEP) \
550 && defined(lockdep_is_held)
551 #undef lockdep_is_held
552 #define lockdep_is_held(lock) \
553 lock_is_held((struct lockdep_map *)&(lock)->dep_map)
560 dnl Do *not* indent the following line: there may be CPP directives.
561 dnl Don't move the `;' right after for the same reason.
566 MODULE_LICENSE("GPL");])
569 # LB_LINUX_COMPILE_IFELSE
571 # like AC_COMPILE_IFELSE
573 # $1 - AC_LANG_SOURCE()
579 AC_DEFUN([LB_LINUX_COMPILE_IFELSE],
580 [m4_ifvaln([$1], [AC_LANG_CONFTEST([AC_LANG_SOURCE([$1])])])dnl
581 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko
582 SUBARCH=$(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/')
583 AS_IF([AC_TRY_COMMAND(cp conftest.c build && make -d [$2] 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$ZFS/include -I${SPL:-$ZFS/include/spl}} -include $CONFIG_INCLUDE" KBUILD_EXTRA_SYMBOLS=${ZFS_OBJ:+$ZFS_OBJ/Module.symvers} -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])],
585 [_AC_MSG_LOG_CONFTEST
586 m4_ifvaln([$5],[$5])dnl])
587 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
591 # LB_LINUX_TRY_COMPILE
593 # like AC_TRY_COMPILE
595 AC_DEFUN([LB_LINUX_TRY_COMPILE], [
596 LB_LINUX_COMPILE_IFELSE(
597 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
598 [modules], [test -s build/conftest.o],
605 # like LB_LINUX_TRY_COMPILE, but with different arguments
607 AC_DEFUN([LB_LINUX_TRY_MAKE], [
608 LB_LINUX_COMPILE_IFELSE(
609 [AC_LANG_SOURCE([LB_LANG_PROGRAM([[$1]], [[$2]])])],
610 [$3], [$4], [$5], [$6])
615 # $1 - checking message
622 AC_DEFUN([LB_CHECK_COMPILE], [
623 AS_VAR_PUSHDEF([lb_compile], [lb_cv_compile_$2])dnl
624 AC_CACHE_CHECK([$1], lb_compile, [
625 LB_LINUX_TRY_COMPILE([$3], [$4],
626 [AS_VAR_SET([lb_compile], [yes])],
627 [AS_VAR_SET([lb_compile], [no])])
629 AS_VAR_IF([lb_compile], [yes], [$5], [$6])[]dnl
630 AS_VAR_POPDEF([lb_compile])dnl
631 ]) # LB_CHECK_COMPILE
634 # LB_CHECK_LINUX_HEADER
636 # Like AC_CHECK_HEADER but checks for a kernel-space header
638 m4_define([LB_CHECK_LINUX_HEADER], [
639 AS_VAR_PUSHDEF([lb_header], [lb_cv_header_$1])dnl
640 AC_CACHE_CHECK([for $1], lb_header, [
641 LB_LINUX_COMPILE_IFELSE([LB_LANG_PROGRAM([@%:@include <$1>])],
642 [modules], [test -s build/conftest.o],
643 [AS_VAR_SET([lb_header], [yes])],
644 [AS_VAR_SET([lb_header], [no])])
646 AS_VAR_IF([lb_header], [yes], [$2], [$3])[]dnl
647 AS_VAR_POPDEF([lb_header])dnl
648 ]) # LB_CHECK_LINUX_HEADER
650 # ------------------------------------------------------------------------------
651 # Support 2 stage: parallel compile then checked test results
652 # Heavily inspired by OpenZFS
654 AC_DEFUN([LB2_LINUX_CONFTEST_C], [
655 test -d ${TEST_DIR}/$2 || mkdir -p ${TEST_DIR}/$2
656 cat confdefs.h - <<_EOF >${TEST_DIR}/$2/$2.c
662 # LB2_LINUX_CONFTEST_MAKEFILE
664 # $1 - *unique* test case name
665 # $2 - additional build flags (ccflags)
666 # $3 - external kernel includes for lnet o2ib|gni
668 AC_DEFUN([LB2_LINUX_CONFTEST_MAKEFILE], [
669 test -d ${TEST_DIR} || mkdir -p ${TEST_DIR}
670 test -d ${TEST_DIR}/$1 || mkdir -p ${TEST_DIR}/$1
672 file=${TEST_DIR}/$1/Makefile
676 # Example command line to manually build source
677 # make modules -C $LINUX_OBJ $ARCH_UM M=${TEST_DIR}/$1
686 LINUXINCLUDE = $EXT_INCLUDE
687 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include
688 LINUXINCLUDE += -Iinclude -Iarch/$SUBARCH/include/generated
689 LINUXINCLUDE += -I$LINUX/include
690 LINUXINCLUDE += -Iinclude2
691 LINUXINCLUDE += -I$LINUX/include/uapi
692 LINUXINCLUDE += -Iinclude/generated
693 LINUXINCLUDE += -I$LINUX/arch/$SUBARCH/include/uapi
694 LINUXINCLUDE += -Iarch/$SUBARCH/include/generated/uapi
695 LINUXINCLUDE += -I$LINUX/include/uapi -Iinclude/generated/uapi
697 LINUXINCLUDE += -include \$(SOBJ)/spl_config.h
700 LINUXINCLUDE += -include \$(ZOBJ)/zfs_config.h
703 LINUXINCLUDE += -I\$(SINC)/include
706 LINUXINCLUDE += -I\$(ZINC) -I\$(ZINC)/include
708 LINUXINCLUDE += -I\$(SINC)
710 LINUXINCLUDE += -I\$(ZINC)/include/spl
713 LINUXINCLUDE += -include $CONFIG_INCLUDE
714 KBUILD_EXTRA_SYMBOLS=${ZFS_OBJ:+$ZFS_OBJ/Module.symvers}
716 ccflags-y := -Werror-implicit-function-declaration
719 # Additional custom CFLAGS as requested.
720 m4_ifval($2, [echo "ccflags-y += $2" >>$file], [])
723 echo "obj-m := $1.o" >>$file
724 echo "obj-m += $1/" >>${TEST_DIR}/Makefile
736 # Used internally by LB2_LINUX_TEST_COMPILE
738 AC_DEFUN([LB2_LINUX_COMPILE], [
740 KBUILD_MODPOST_NOFINAL="yes"
741 make modules -k -j$TEST_JOBS -C $LINUX_OBJ $ARCH_UM
742 M=$1 >$1/build.log 2>&1])
743 AS_IF([AC_TRY_COMMAND([$2])], [$3], [$4])
747 # LB2_LINUX_TEST_COMPILE
749 # Perform a full compile excluding the final modpost phase.
753 AC_DEFUN([LB2_LINUX_TEST_COMPILE], [
754 LB2_LINUX_COMPILE([$2], [test -f $2/build.log], [
755 mv $2/Makefile $2/Makefile.compile.$1
756 mv $2/build.log $2/build.log.$1
759 *** Unable to compile test source to determine kernel interfaces.])
764 # Perform the compilation of the test cases in two phases.
766 # Phase 1) attempt to build the object files for all of the tests
767 # defined by the LB2_LINUX_TEST_SRC macro.
769 # Phase 2) disable all tests which failed the initial compilation.
771 # This allows us efficiently build the test cases in parallel while
772 # remaining resilient to build failures which are expected when
773 # detecting the available kernel interfaces.
775 # The maximum allowed parallelism can be controlled by setting the
776 # TEST_JOBS environment variable which defaults to $(nproc).
778 AC_DEFUN([LB2_LINUX_TEST_COMPILE_ALL], [
779 # Phase 1 - Compilation only, final linking is skipped.
780 LB2_LINUX_TEST_COMPILE([$1], [${TEST_DIR}])
782 for dir in $(awk '/^obj-m/ { print [$]3 }' \
783 ${TEST_DIR}/Makefile.compile.$1); do
785 AS_IF([test -f ${TEST_DIR}/$name/$name.o], [
786 touch ${TEST_DIR}/$name/$name.ko
798 # $5 - external include paths
800 # NOTICE as all of the test cases are compiled in parallel tests may not
801 # depend on the results other tests.
802 # Each test needs resolve any external dependencies at the time the program
803 # source is generated.
805 AC_DEFUN([LB2_LINUX_TEST_SRC], [
806 LB2_LINUX_CONFTEST_C([LB_LANG_PROGRAM([[$2]], [[$3]])], [$1_pc])
807 LB2_LINUX_CONFTEST_MAKEFILE([$1_pc], [$4], [$5])
811 # LB2_LINUX_TEST_RESULT
813 # $1 - *unique* name matching the LB2_LINUX_TEST_SRC macro
814 # $2 - run on success (valid .ko generated)
815 # $3 - run on failure (unable to compile)
817 AC_DEFUN([LB2_LINUX_TEST_RESULT], [
818 AS_IF([test -d ${TEST_DIR}/$1_pc], [
819 AS_IF([test -f ${TEST_DIR}/$1_pc/$1_pc.ko], [$2], [$3])
822 *** No matching source for the "$1" test, check that
823 *** both the test source and result macros refer to the same name.