X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=config%2Fkernel.m4;h=74ce22ce634d424ad7b813dec86ec3d53904e0e7;hb=0f37d0c8bed442dd0d2c1b1dddd68653fa6eec66;hp=a146a5f088e1bd9d9f5ca5d40fbb8feb21677e9c;hpb=62b749c8c846442f37f41c8ae5c612d75308c046;p=zfs.git diff --git a/config/kernel.m4 b/config/kernel.m4 index a146a5f..74ce22c 100644 --- a/config/kernel.m4 +++ b/config/kernel.m4 @@ -2,61 +2,602 @@ dnl # dnl # Default ZFS kernel configuration dnl # AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [ - dnl # Kernel build make options - dnl # KERNELMAKE_PARAMS="V=1" # Enable verbose module build - KERNELMAKE_PARAMS= - - dnl # Kernel build cpp flags - KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL " - KERNELCPPFLAGS="$KERNELCPPFLAGS -I$splsrc -I$splsrc/include -I$TOPDIR" - - dnl # Required for pread() functionality an other GNU goodness - HOSTCFLAGS="$HOSTCFLAGS -ggdb -O2 -std=c99 " - HOSTCFLAGS="$HOSTCFLAGS -D_GNU_SOURCE -D__EXTENSIONS__ " - - dnl # XXX: Quiet warnings not covered by the gcc-* patches - dnl # XXX: Remove once all the warnings are resolved - HOSTCFLAGS="$HOSTCFLAGS -Wno-switch -Wno-unused -Wno-missing-braces " - HOSTCFLAGS="$HOSTCFLAGS -Wno-parentheses " - HOSTCFLAGS="$HOSTCFLAGS -Wno-uninitialized -fno-strict-aliasing " - - dnl # Expected defines not covered by zfs_config.h or spl_config.h - HOSTCFLAGS="$HOSTCFLAGS -DHAVE_SPL -D_POSIX_PTHREAD_SEMANTICS " - HOSTCFLAGS="$HOSTCFLAGS -D_FILE_OFFSET_BITS=64 " - HOSTCFLAGS="$HOSTCFLAGS -D_LARGEFILE64_SOURCE -D_REENTRANT " - HOSTCFLAGS="$HOSTCFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\" " - - dnl # Expected default include path - HOSTCFLAGS="$HOSTCFLAGS -I$TOPDIR " - - if test "$kernelbuild" != "$kernelsrc"; then - KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$kernelbuild" + ZFS_AC_KERNEL + ZFS_AC_SPL + ZFS_AC_TEST_MODULE + ZFS_AC_KERNEL_CONFIG + ZFS_AC_KERNEL_BDEV_BLOCK_DEVICE_OPERATIONS + ZFS_AC_KERNEL_BLOCK_DEVICE_OPERATIONS_RELEASE_VOID + ZFS_AC_KERNEL_TYPE_FMODE_T + ZFS_AC_KERNEL_KOBJ_NAME_LEN + ZFS_AC_KERNEL_3ARG_BLKDEV_GET + ZFS_AC_KERNEL_BLKDEV_GET_BY_PATH + ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE + ZFS_AC_KERNEL_LOOKUP_BDEV + ZFS_AC_KERNEL_INVALIDATE_BDEV_ARGS + ZFS_AC_KERNEL_BDEV_LOGICAL_BLOCK_SIZE + ZFS_AC_KERNEL_BDEV_PHYSICAL_BLOCK_SIZE + ZFS_AC_KERNEL_BIO_FAILFAST + ZFS_AC_KERNEL_BIO_FAILFAST_DTD + ZFS_AC_KERNEL_REQ_FAILFAST_MASK + ZFS_AC_KERNEL_BIO_END_IO_T_ARGS + ZFS_AC_KERNEL_BIO_RW_SYNC + ZFS_AC_KERNEL_BIO_RW_SYNCIO + ZFS_AC_KERNEL_REQ_SYNC + ZFS_AC_KERNEL_BLK_END_REQUEST + ZFS_AC_KERNEL_BLK_QUEUE_FLUSH + ZFS_AC_KERNEL_BLK_QUEUE_MAX_HW_SECTORS + ZFS_AC_KERNEL_BLK_QUEUE_MAX_SEGMENTS + ZFS_AC_KERNEL_BLK_QUEUE_PHYSICAL_BLOCK_SIZE + ZFS_AC_KERNEL_BLK_QUEUE_IO_OPT + ZFS_AC_KERNEL_BLK_QUEUE_NONROT + ZFS_AC_KERNEL_BLK_QUEUE_DISCARD + ZFS_AC_KERNEL_BLK_FETCH_REQUEST + ZFS_AC_KERNEL_BLK_REQUEUE_REQUEST + ZFS_AC_KERNEL_BLK_RQ_BYTES + ZFS_AC_KERNEL_BLK_RQ_POS + ZFS_AC_KERNEL_BLK_RQ_SECTORS + ZFS_AC_KERNEL_GET_DISK_RO + ZFS_AC_KERNEL_GET_GENDISK + ZFS_AC_KERNEL_RQ_IS_SYNC + ZFS_AC_KERNEL_RQ_FOR_EACH_SEGMENT + ZFS_AC_KERNEL_DISCARD_GRANULARITY + ZFS_AC_KERNEL_CONST_XATTR_HANDLER + ZFS_AC_KERNEL_XATTR_HANDLER_GET + ZFS_AC_KERNEL_XATTR_HANDLER_SET + ZFS_AC_KERNEL_SHOW_OPTIONS + ZFS_AC_KERNEL_FSYNC + ZFS_AC_KERNEL_EVICT_INODE + ZFS_AC_KERNEL_DIRTY_INODE_WITH_FLAGS + ZFS_AC_KERNEL_NR_CACHED_OBJECTS + ZFS_AC_KERNEL_FREE_CACHED_OBJECTS + ZFS_AC_KERNEL_FALLOCATE + ZFS_AC_KERNEL_MKDIR_UMODE_T + ZFS_AC_KERNEL_LOOKUP_NAMEIDATA + ZFS_AC_KERNEL_CREATE_NAMEIDATA + ZFS_AC_KERNEL_TRUNCATE_RANGE + ZFS_AC_KERNEL_AUTOMOUNT + ZFS_AC_KERNEL_ENCODE_FH_WITH_INODE + ZFS_AC_KERNEL_COMMIT_METADATA + ZFS_AC_KERNEL_CLEAR_INODE + ZFS_AC_KERNEL_INSERT_INODE_LOCKED + ZFS_AC_KERNEL_D_MAKE_ROOT + ZFS_AC_KERNEL_D_OBTAIN_ALIAS + ZFS_AC_KERNEL_D_SET_D_OP + ZFS_AC_KERNEL_D_REVALIDATE_NAMEIDATA + ZFS_AC_KERNEL_CONST_DENTRY_OPERATIONS + ZFS_AC_KERNEL_CHECK_DISK_SIZE_CHANGE + ZFS_AC_KERNEL_TRUNCATE_SETSIZE + ZFS_AC_KERNEL_6ARGS_SECURITY_INODE_INIT_SECURITY + ZFS_AC_KERNEL_CALLBACK_SECURITY_INODE_INIT_SECURITY + ZFS_AC_KERNEL_MOUNT_NODEV + ZFS_AC_KERNEL_SHRINK + ZFS_AC_KERNEL_S_INSTANCES_LIST_HEAD + ZFS_AC_KERNEL_S_D_OP + ZFS_AC_KERNEL_BDI + ZFS_AC_KERNEL_BDI_SETUP_AND_REGISTER + ZFS_AC_KERNEL_SET_NLINK + ZFS_AC_KERNEL_ELEVATOR_CHANGE + ZFS_AC_KERNEL_5ARG_SGET + ZFS_AC_KERNEL_LSEEK_EXECUTE + ZFS_AC_KERNEL_VFS_ITERATE + + AS_IF([test "$LINUX_OBJ" != "$LINUX"], [ + KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ" + ]) + AC_SUBST(KERNELMAKE_PARAMS) + + + dnl # -Wall -fno-strict-aliasing -Wstrict-prototypes and other + dnl # compiler options are added by the kernel build system. + KERNELCPPFLAGS="$KERNELCPPFLAGS $NO_UNUSED_BUT_SET_VARIABLE" + KERNELCPPFLAGS="$KERNELCPPFLAGS -DHAVE_SPL -D_KERNEL" + KERNELCPPFLAGS="$KERNELCPPFLAGS -DTEXT_DOMAIN=\\\"zfs-linux-kernel\\\"" + + AC_SUBST(KERNELCPPFLAGS) +]) + +dnl # +dnl # Detect name used for Module.symvers file in kernel +dnl # +AC_DEFUN([ZFS_AC_MODULE_SYMVERS], [ + modpost=$LINUX/scripts/Makefile.modpost + AC_MSG_CHECKING([kernel file name for module symbols]) + AS_IF([test "x$enable_linux_builtin" != xyes -a -f "$modpost"], [ + AS_IF([grep -q Modules.symvers $modpost], [ + LINUX_SYMBOLS=Modules.symvers + ], [ + LINUX_SYMBOLS=Module.symvers + ]) + + AS_IF([test ! -f "$LINUX_OBJ/$LINUX_SYMBOLS"], [ + AC_MSG_ERROR([ + *** Please make sure the kernel devel package for your distribution + *** is installed. If you are building with a custom kernel, make sure the + *** kernel is configured, built, and the '--with-linux=PATH' configure + *** option refers to the location of the kernel source.]) + ]) + ], [ + LINUX_SYMBOLS=NONE + ]) + AC_MSG_RESULT($LINUX_SYMBOLS) + AC_SUBST(LINUX_SYMBOLS) +]) + +dnl # +dnl # Detect the kernel to be built against +dnl # +AC_DEFUN([ZFS_AC_KERNEL], [ + AC_ARG_WITH([linux], + AS_HELP_STRING([--with-linux=PATH], + [Path to kernel source]), + [kernelsrc="$withval"]) + + AC_ARG_WITH(linux-obj, + AS_HELP_STRING([--with-linux-obj=PATH], + [Path to kernel build objects]), + [kernelbuild="$withval"]) + + AC_MSG_CHECKING([kernel source directory]) + AS_IF([test -z "$kernelsrc"], [ + AS_IF([test -e "/lib/modules/$(uname -r)/source"], [ + headersdir="/lib/modules/$(uname -r)/source" + sourcelink=$(readlink -f "$headersdir") + ], [test -e "/lib/modules/$(uname -r)/build"], [ + headersdir="/lib/modules/$(uname -r)/build" + sourcelink=$(readlink -f "$headersdir") + ], [ + sourcelink=$(ls -1d /usr/src/kernels/* \ + /usr/src/linux-* \ + 2>/dev/null | grep -v obj | tail -1) + ]) + + AS_IF([test -n "$sourcelink" && test -e ${sourcelink}], [ + kernelsrc=`readlink -f ${sourcelink}` + ], [ + kernelsrc="[Not found]" + ]) + ], [ + AS_IF([test "$kernelsrc" = "NONE"], [ + kernsrcver=NONE + ]) + ]) + + AC_MSG_RESULT([$kernelsrc]) + AS_IF([test ! -d "$kernelsrc"], [ + AC_MSG_ERROR([ + *** Please make sure the kernel devel package for your distribution + *** is installed and then try again. If that fails, you can specify the + *** location of the kernel source with the '--with-linux=PATH' option.]) + ]) + + AC_MSG_CHECKING([kernel build directory]) + AS_IF([test -z "$kernelbuild"], [ + AS_IF([test -e "/lib/modules/$(uname -r)/build"], [ + kernelbuild=`readlink -f /lib/modules/$(uname -r)/build` + ], [test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}], [ + kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu} + ], [test -d ${kernelsrc}-obj/${target_cpu}/default], [ + kernelbuild=${kernelsrc}-obj/${target_cpu}/default + ], [test -d `dirname ${kernelsrc}`/build-${target_cpu}], [ + kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu} + ], [ + kernelbuild=${kernelsrc} + ]) + ]) + AC_MSG_RESULT([$kernelbuild]) + + AC_MSG_CHECKING([kernel source version]) + utsrelease1=$kernelbuild/include/linux/version.h + utsrelease2=$kernelbuild/include/linux/utsrelease.h + utsrelease3=$kernelbuild/include/generated/utsrelease.h + AS_IF([test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1], [ + utsrelease=linux/version.h + ], [test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2], [ + utsrelease=linux/utsrelease.h + ], [test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3], [ + utsrelease=generated/utsrelease.h + ]) + + AS_IF([test "$utsrelease"], [ + kernsrcver=`(echo "#include <$utsrelease>"; + echo "kernsrcver=UTS_RELEASE") | + cpp -I $kernelbuild/include | + grep "^kernsrcver=" | cut -d \" -f 2` + + AS_IF([test -z "$kernsrcver"], [ + AC_MSG_RESULT([Not found]) + AC_MSG_ERROR([*** Cannot determine kernel version.]) + ]) + ], [ + AC_MSG_RESULT([Not found]) + if test "x$enable_linux_builtin" != xyes; then + AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.]) + else + AC_MSG_ERROR([ + *** Cannot find UTS_RELEASE definition. + *** Please run 'make prepare' inside the kernel source tree.]) + fi + ]) + + AC_MSG_RESULT([$kernsrcver]) + + LINUX=${kernelsrc} + LINUX_OBJ=${kernelbuild} + LINUX_VERSION=${kernsrcver} + + AC_SUBST(LINUX) + AC_SUBST(LINUX_OBJ) + AC_SUBST(LINUX_VERSION) + + ZFS_AC_MODULE_SYMVERS +]) + + +dnl # +dnl # Detect the SPL module to be built against +dnl # +AC_DEFUN([ZFS_AC_SPL], [ + AC_ARG_WITH([spl], + AS_HELP_STRING([--with-spl=PATH], + [Path to spl source]), + [splsrc="$withval"]) + + AC_ARG_WITH([spl-obj], + AS_HELP_STRING([--with-spl-obj=PATH], + [Path to spl build objects]), + [splbuild="$withval"]) + + AC_ARG_WITH([spl-timeout], + AS_HELP_STRING([--with-spl-timeout=SECS], + [Wait SECS for SPL header and symver file @<:@default=0@:>@]), + [timeout="$withval"], [timeout=0]) + + dnl # + dnl # The existence of spl.release.in is used to identify a valid + dnl # source directory. In order of preference: + dnl # + splsrc0="/var/lib/dkms/spl/${VERSION}/build" + splsrc1="/usr/src/spl-${VERSION}/${LINUX_VERSION}" + splsrc2="/usr/src/spl-${VERSION}" + splsrc3="../spl/" + splsrc4="$LINUX" + + AC_MSG_CHECKING([spl source directory]) + AS_IF([test -z "${splsrc}"], [ + AS_IF([ test -e "${splsrc0}/spl.release.in"], [ + splsrc=${splsrc0} + ], [ test -e "${splsrc1}/spl.release.in"], [ + splsrc=${splsrc1} + ], [ test -e "${splsrc2}/spl.release.in"], [ + splsrc=${splsrc2} + ], [ test -e "${splsrc3}/spl.release.in"], [ + splsrc=$(readlink -f "${splsrc3}") + ], [ test -e "${splsrc4}/spl.release.in" ], [ + splsrc=${splsrc4} + ], [ + splsrc="[Not found]" + ]) + ], [ + AS_IF([test "$splsrc" = "NONE"], [ + splbuild=NONE + splsrcver=NONE + ]) + ]) + + AC_MSG_RESULT([$splsrc]) + AS_IF([ test ! -e "$splsrc/spl.release.in"], [ + AC_MSG_ERROR([ + *** Please make sure the kmod spl devel package for your distribution + *** is installed then try again. If that fails you can specify the + *** location of the spl source with the '--with-spl=PATH' option.]) + ]) + + dnl # + dnl # The existence of the spl_config.h is used to identify a valid + dnl # spl object directory. In many cases the object and source + dnl # directory are the same, however the objects may also reside + dnl # is a subdirectory named after the kernel version. + dnl # + dnl # This file is supposed to be available after DKMS finishes + dnl # building the SPL kernel module for the target kernel. The + dnl # '--with-spl-timeout' option can be passed to pause here, + dnl # waiting for the file to appear from a concurrently building + dnl # SPL package. + dnl # + AC_MSG_CHECKING([spl build directory]) + while true; do + AS_IF([test -z "$splbuild"], [ + AS_IF([ test -e "${splsrc}/${LINUX_VERSION}/spl_config.h" ], [ + splbuild="${splsrc}/${LINUX_VERSION}" + ], [ test -e "${splsrc}/spl_config.h" ], [ + splbuild="${splsrc}" + ], [ + splbuild="[Not found]" + ]) + ]) + AS_IF([test -e "$splbuild/spl_config.h" -o $timeout -le 0], [ + break; + ], [ + sleep 1 + timeout=$((timeout-1)) + ]) + done + + AC_MSG_RESULT([$splbuild]) + AS_IF([ ! test -e "$splbuild/spl_config.h"], [ + AC_MSG_ERROR([ + *** Please make sure the kmod spl devel package for your + *** distribution is installed then try again. If that fails you + *** can specify the location of the spl objects with the + *** '--with-spl-obj=PATH' option.]) + ]) + + AC_MSG_CHECKING([spl source version]) + AS_IF([test -r $splbuild/spl_config.h && + fgrep -q SPL_META_VERSION $splbuild/spl_config.h], [ + + splsrcver=`(echo "#include "; + echo "splsrcver=SPL_META_VERSION-SPL_META_RELEASE") | + cpp -I $splbuild | + grep "^splsrcver=" | tr -d \" | cut -d= -f2` + ]) + + AS_IF([test -z "$splsrcver"], [ + AC_MSG_RESULT([Not found]) + AC_MSG_ERROR([ + *** Cannot determine the version of the spl source. + *** Please prepare the spl source before running this script]) + ]) + + AC_MSG_RESULT([$splsrcver]) + + SPL=${splsrc} + SPL_OBJ=${splbuild} + SPL_VERSION=${splsrcver} + + AC_SUBST(SPL) + AC_SUBST(SPL_OBJ) + AC_SUBST(SPL_VERSION) + + dnl # + dnl # Detect the name used for the SPL Module.symvers file. If one + dnl # does not exist this is likely because the SPL has been configured + dnl # but not built. The '--with-spl-timeout' option can be passed + dnl # to pause here, waiting for the file to appear from a concurrently + dnl # building SPL package. If the file does not appear in time, a good + dnl # guess is made as to what this file will be named based on what it + dnl # is named in the kernel build products. This file will first be + dnl # used at link time so if the guess is wrong the build will fail + dnl # then. This unfortunately means the ZFS package does not contain a + dnl # reliable mechanism to detect symbols exported by the SPL at + dnl # configure time. + dnl # + AC_MSG_CHECKING([spl file name for module symbols]) + SPL_SYMBOLS=NONE + + while true; do + AS_IF([test -r $SPL_OBJ/Module.symvers], [ + SPL_SYMBOLS=Module.symvers + ], [test -r $SPL_OBJ/Modules.symvers], [ + SPL_SYMBOLS=Modules.symvers + ], [test -r $SPL_OBJ/module/Module.symvers], [ + SPL_SYMBOLS=Module.symvers + ], [test -r $SPL_OBJ/module/Modules.symvers], [ + SPL_SYMBOLS=Modules.symvers + ]) + + AS_IF([test $SPL_SYMBOLS != NONE -o $timeout -le 0], [ + break; + ], [ + sleep 1 + timeout=$((timeout-1)) + ]) + done + + AS_IF([test "$SPL_SYMBOLS" = NONE], [ + SPL_SYMBOLS=$LINUX_SYMBOLS + ]) + + AC_MSG_RESULT([$SPL_SYMBOLS]) + AC_SUBST(SPL_SYMBOLS) +]) + +dnl # +dnl # Basic toolchain sanity check. +dnl # +AC_DEFUN([ZFS_AC_TEST_MODULE], + [AC_MSG_CHECKING([whether modules can be built]) + ZFS_LINUX_TRY_COMPILE([],[],[ + AC_MSG_RESULT([yes]) + ],[ + AC_MSG_RESULT([no]) + if test "x$enable_linux_builtin" != xyes; then + AC_MSG_ERROR([*** Unable to build an empty module.]) + else + AC_MSG_ERROR([ + *** Unable to build an empty module. + *** Please run 'make scripts' inside the kernel source tree.]) + fi + ]) +]) + +dnl # +dnl # Certain kernel build options are not supported. These must be +dnl # detected at configure time and cause a build failure. Otherwise +dnl # modules may be successfully built that behave incorrectly. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_CONFIG], [ + + AS_IF([test "$ZFS_META_LICENSE" = GPL], [ + AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1], + [Define to 1 if licensed under the GPL]) + ]) + + ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC +]) + +dnl # +dnl # Check CONFIG_DEBUG_LOCK_ALLOC +dnl # +dnl # This is typically only set for debug kernels because it comes with +dnl # a performance penalty. However, when it is set it maps the non-GPL +dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol. +dnl # This will cause a failure at link time which we'd rather know about +dnl # at compile time. +dnl # +dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol +dnl # with the upstream community we add a check to detect this case. +dnl # +AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [ + + ZFS_LINUX_CONFIG([DEBUG_LOCK_ALLOC], [ + AC_MSG_CHECKING([whether mutex_lock() is GPL-only]) + tmp_flags="$EXTRA_KCFLAGS" + ZFS_LINUX_TRY_COMPILE([ + #include + #include + + MODULE_LICENSE("$ZFS_META_LICENSE"); + ],[ + struct mutex lock; + + mutex_init(&lock); + mutex_lock(&lock); + mutex_unlock(&lock); + ],[ + AC_MSG_RESULT(no) + ],[ + AC_MSG_RESULT(yes) + AC_MSG_ERROR([ + *** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible + *** with the CDDL license and will prevent the module linking stage + *** from succeeding. You must rebuild your kernel without this + *** option enabled.]) + ]) + EXTRA_KCFLAGS="$tmp_flags" + ], []) +]) + +dnl # +dnl # ZFS_LINUX_CONFTEST +dnl # +AC_DEFUN([ZFS_LINUX_CONFTEST], [ +cat confdefs.h - <<_ACEOF >conftest.c +$1 +_ACEOF +]) + +dnl # +dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY]) +dnl # +m4_define([ZFS_LANG_PROGRAM], [ +$1 +int +main (void) +{ +dnl Do *not* indent the following line: there may be CPP directives. +dnl Don't move the `;' right after for the same reason. +$2 + ; + return 0; +} +]) + +dnl # +dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE +dnl # +AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [ + m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])]) + rm -Rf build && mkdir -p build && touch build/conftest.mod.c + echo "obj-m := conftest.o" >build/Makefile + modpost_flag='' + test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage + AS_IF( + [AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])], + [$4], + [_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])] + ) + rm -Rf build +]) + +dnl # +dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE +dnl # +AC_DEFUN([ZFS_LINUX_TRY_COMPILE], + [ZFS_LINUX_COMPILE_IFELSE( + [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])], + [modules], + [test -s build/conftest.o], + [$3], [$4]) +]) + +dnl # +dnl # ZFS_LINUX_CONFIG +dnl # +AC_DEFUN([ZFS_LINUX_CONFIG], + [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1]) + ZFS_LINUX_TRY_COMPILE([ + #include + ],[ + #ifndef CONFIG_$1 + #error CONFIG_$1 not #defined + #endif + ],[ + AC_MSG_RESULT([yes]) + $2 + ],[ + AC_MSG_RESULT([no]) + $3 + ]) +]) + +dnl # +dnl # ZFS_CHECK_SYMBOL_EXPORT +dnl # check symbol exported or not +dnl # +AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT], [ + grep -q -E '[[[:space:]]]$1[[[:space:]]]' \ + $LINUX_OBJ/$LINUX_SYMBOLS 2>/dev/null + rc=$? + if test $rc -ne 0; then + export=0 + for file in $2; do + grep -q -E "EXPORT_SYMBOL.*($1)" \ + "$LINUX/$file" 2>/dev/null + rc=$? + if test $rc -eq 0; then + export=1 + break; + fi + done + if test $export -eq 0; then : + $4 + else : + $3 + fi + else : + $3 fi +]) - AC_SUBST(KERNELMAKE_PARAMS) - AC_SUBST(KERNELCPPFLAGS) - AC_SUBST(HOSTCFLAGS) - - dnl # XXX: I really, really hate this... but to ensure the kernel - dnl # build system compiles C files shared between a library and a - dnl # kernel module, we need to ensure each file has a unique make - dnl # target. To do that I'm creating symlinks for each shared - dnl # file at configure time. It may be possible something better - dnl # can be done in the Makefile but it will take some serious - dnl # investigation and I don't have the time now. - - echo "creating symlinks for additional kernel make targets" - ln -f -s $LIBDIR/libport/u8_textprep.c $LIBDIR/libport/ku8_textprep.c - ln -f -s $LIBDIR/libavl/avl.c $LIBDIR/libavl/kavl.c - ln -f -s $LIBDIR/libavl/avl.c $LIBDIR/libavl/uavl.c - ln -f -s $LIBDIR/libnvpair/nvpair.c $LIBDIR/libnvpair/knvpair.c - ln -f -s $LIBDIR/libnvpair/nvpair.c $LIBDIR/libnvpair/unvpair.c - ln -f -s $LIBDIR/libzcommon/zfs_deleg.c $LIBDIR/libzcommon/kzfs_deleg.c - ln -f -s $LIBDIR/libzcommon/zfs_prop.c $LIBDIR/libzcommon/kzfs_prop.c - ln -f -s $LIBDIR/libzcommon/zprop_common.c $LIBDIR/libzcommon/kzprop_common.c - ln -f -s $LIBDIR/libzcommon/compress.c $LIBDIR/libzcommon/kcompress.c - ln -f -s $LIBDIR/libzcommon/list.c $LIBDIR/libzcommon/klist.c - ln -f -s $LIBDIR/libzcommon/zfs_namecheck.c $LIBDIR/libzcommon/kzfs_namecheck.c - ln -f -s $LIBDIR/libzcommon/zfs_comutil.c $LIBDIR/libzcommon/kzfs_comutil.c - ln -f -s $LIBDIR/libzcommon/zpool_prop.c $LIBDIR/libzcommon/kzpool_prop.c +dnl # +dnl # ZFS_LINUX_TRY_COMPILE_SYMBOL +dnl # like ZFS_LINUX_TRY_COMPILE, except ZFS_CHECK_SYMBOL_EXPORT +dnl # is called if not compiling for builtin +dnl # +AC_DEFUN([ZFS_LINUX_TRY_COMPILE_SYMBOL], [ + ZFS_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1]) + if test $rc -ne 0; then : + $6 + else + if test "x$enable_linux_builtin" != xyes; then + ZFS_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1]) + fi + if test $rc -ne 0; then : + $6 + else : + $5 + fi + fi ])