Update build system and packaging

Minimal changes required to integrate the SPL sources in to the
ZFS repository build infrastructure and packaging.

Build system and packaging:
  * Renamed SPL_* autoconf m4 macros to ZFS_*.
  * Removed redundant SPL_* autoconf m4 macros.
  * Updated the RPM spec files to remove SPL package dependency.
  * The zfs package obsoletes the spl package, and the zfs-kmod
    package obsoletes the spl-kmod package.
  * The zfs-kmod-devel* packages were updated to add compatibility
    symlinks under /usr/src/spl-x.y.z until all dependent packages
    can be updated.  They will be removed in a future release.
  * Updated copy-builtin script for in-kernel builds.
  * Updated DKMS package to include the spl.ko.
  * Updated stale AUTHORS file to include all contributors.
  * Updated stale COPYRIGHT and included the SPL as an exception.
  * Renamed README.markdown to README.md
  * Renamed OPENSOLARIS.LICENSE to LICENSE.
  * Renamed DISCLAIMER to NOTICE.

Required code changes:
  * Removed redundant HAVE_SPL macro.
  * Removed _BOOT from nvpairs since it doesn't apply for Linux.
  * Initial header cleanup (removal of empty headers, refactoring).
  * Remove SPL repository clone/build from zimport.sh.
  * Use of DEFINE_RATELIMIT_STATE and DEFINE_SPINLOCK removed due
    to build issues when forcing C99 compilation.
  * Replaced legacy ACCESS_ONCE with READ_ONCE.
  * Include needed headers for `current` and `EXPORT_SYMBOL`.

Reviewed-by: Tony Hutter <[email protected]>
Reviewed-by: Olaf Faaland <[email protected]>
Reviewed-by: Matthew Ahrens <[email protected]>
Reviewed-by: Pavel Zakharov <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
TEST_ZIMPORT_SKIP="yes"
Closes #7556

1 files changed, 19 insertions, 3 deletions

diff --git a/Makefile.am b/Makefile.am
index 20f790328..669231c07 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,17 +11,17 @@ endif
 if CONFIG_KERNEL
 SUBDIRS += module
 
-extradir = @prefix@/src/zfs-$(VERSION)
+extradir = $(prefix)/src/zfs-$(VERSION)
 extra_HEADERS = zfs.release.in zfs_config.h.in
 
-kerneldir = @prefix@/src/zfs-$(VERSION)/$(LINUX_VERSION)
+kerneldir = $(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION)
 nodist_kernel_HEADERS = zfs.release zfs_config.h module/$(LINUX_SYMBOLS)
 endif
 
 AUTOMAKE_OPTIONS = foreign
 EXTRA_DIST  = autogen.sh copy-builtin
 EXTRA_DIST += config/config.awk config/rpm.am config/deb.am config/tgz.am
-EXTRA_DIST += META DISCLAIMER COPYRIGHT README.markdown OPENSOLARIS.LICENSE
+EXTRA_DIST += META AUTHORS COPYRIGHT LICENSE NOTICE README.md
 
 @CODE_COVERAGE_RULES@
 
@@ -44,6 +44,22 @@ dist-hook:
 	sed -i 's/Release:[[:print:]]*/Release:      $(RELEASE)/' \
 		$(distdir)/META
 
+# For compatibility, create a matching spl-x.y.z directly which contains
+# symlinks to the updated header and object file locations.  These
+# compatibility links will be removed in the next major release.
+if CONFIG_KERNEL
+install-data-hook:
+	mkdir $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
+	cd $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
+	ln -s ../zfs-$(VERSION)/include/spl include && \
+	ln -s ../zfs-$(VERSION)/$(LINUX_VERSION) $(LINUX_VERSION) && \
+	ln -s ../zfs-$(VERSION)/zfs_config.h.in spl_config.h.in && \
+	ln -s ../zfs-$(VERSION)/zfs.release.in spl.release.in && \
+	cd $(DESTDIR)$(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION) && \
+	ln -s zfs_config.h spl_config.h && \
+	ln -s zfs.release spl.release
+endif
+
 checkstyle: cstyle shellcheck flake8 commitcheck mancheck testscheck
 
 commitcheck: