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410287f7f8
META lists the maximum kernel version we consider to be fully supported. However, we don't enforce this. Sometimes we ship experimental patches for a newer kernel than we're ready to support or, less often, we compile just fine against a newer kernel. Invariably, something doesn't quite work properly, and it's difficult for users to understand that they're actually running against a kernel that we're not yet ready to support. This commit tries to improve this situation. First, it simply enforces Linux-Maximum, by having configure bail out if you try to compile against a newer version that. Then, it adds the --enable-linux-experimental switch to configure. When supplied, this disables enforcing the maximum version, allowing the user to attempt to build against a kernel with version higher than Linux-Maximum. Finally, if the switch is supplied _and_ configure is run against a higher kernel version, it shows a big warning message when configure finishes, and defines HAVE_LINUX_EXPERIMENTAL for the build. This allows us to add code to modify runtime behaviour as well. Reviewed-by: Robert Evans <evansr@google.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Rob Norris <robn@despairlabs.com> Sponsored-by: https://despairlabs.com/sponsor/ Closes #15986
92 lines
2.5 KiB
Plaintext
92 lines
2.5 KiB
Plaintext
/*
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* This file is part of OpenZFS.
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*
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* Copyright (c) 2009 Lawrence Livermore National Security, LLC.
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* Produced at Lawrence Livermore National Laboratory
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* Written by:
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* Brian Behlendorf <behlendorf1@llnl.gov>,
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* Herb Wartens <wartens2@llnl.gov>,
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* Jim Garlick <garlick@llnl.gov>
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* LLNL-CODE-403049
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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AC_INIT(m4_esyscmd(awk '/^Name:/ {printf $2}' META),
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m4_esyscmd(awk '/^Version:/ {printf $2}' META))
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CFGOPTS="$*"
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AC_LANG(C)
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ZFS_AC_META
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AC_CONFIG_AUX_DIR([config])
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AC_CONFIG_MACRO_DIR([config])
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AC_CANONICAL_TARGET
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AM_MAINTAINER_MODE
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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
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AM_INIT_AUTOMAKE([subdir-objects foreign])
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# Remove default macros from config.h:
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# PACKAGE, PACKAGE_{BUGREPORT,NAME,STRING,TARNAME,VERSION}, STDC_HEADERS, VERSION
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AC_CONFIG_HEADERS([zfs_config.h], [
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$SED -nri~ -e '/^$/be' -e 'N;N;/#define (PACKAGE|VERSION|STDC_HEADERS)/d' -e ':e' -e 'p' zfs_config.h && rm zfs_config.h~ || exit])
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LT_INIT
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AC_PROG_INSTALL
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AC_PROG_CC
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AC_PROG_LN_S
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PKG_PROG_PKG_CONFIG
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AM_PROG_AS
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AM_PROG_CC_C_O
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AX_CODE_COVERAGE
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_AM_PROG_TAR(pax)
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ZFS_AC_LICENSE
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ZFS_AC_CONFIG
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ZFS_AC_PACKAGE
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ZFS_AC_DEBUG
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ZFS_AC_DEBUGINFO
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ZFS_AC_DEBUG_KMEM
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ZFS_AC_DEBUG_KMEM_TRACKING
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ZFS_AC_DEBUG_INVARIANTS
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AC_CONFIG_FILES([
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contrib/debian/rules
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contrib/debian/changelog
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Makefile
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include/Makefile
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lib/libzfs/libzfs.pc
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lib/libzfs_core/libzfs_core.pc
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lib/libzfsbootenv/libzfsbootenv.pc
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module/Kbuild
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module/Makefile
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rpm/generic/zfs-dkms.spec
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rpm/generic/zfs-kmod.spec
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rpm/generic/zfs.spec
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rpm/redhat/zfs-dkms.spec
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rpm/redhat/zfs-kmod.spec
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rpm/redhat/zfs.spec
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tests/zfs-tests/tests/Makefile
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zfs.release
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])
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AC_OUTPUT
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ZFS_AC_KERNEL_VERSION_WARNING
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