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stand: Add comments on ZFS build

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Add comments describing the weird nesting things we have to do to live
inside the ZFS world. Also fix a stale comment by moving nvlist.c to an
early user.

Sponsored by:		Netflix
This commit is contained in:
Warner Losh 2022-07-08 17:35:11 -06:00
parent 75ad24775b
commit 4773d3425e
1 changed files with 20 additions and 3 deletions
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23
stand/libsa/zfs/Makefile.inc
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@ -27,11 +27,27 @@ CFLAGS+= -I${LDRSRC}
CFLAGS+= -I${SYSDIR}/cddl/boot/zfs
CFLAGS+= -I${SYSDIR}/crypto/skein
#
# Any file that needs the FreeBSD overrides that are in
# include/os/freebssd/spl/XXX needs to have these added to
# CFLAGS_EARLY.file.c. In general, we try to build out of the OpenZFS tree
# unaltered. There's a problem, though, that since we're building for a
# standalone environment that's neither userland nor kernel, we sometimes need
# special code and that's handled by the 'nested' includes where we either setup
# something just-so before we include the include/XXX file, or if we need to
# tweak something defined in that file.
#
ZFS_EARLY= -I${ZFSSRC}/spl \
-I${ZFSOSINC} \
-I${ZFSOSINC}/spl \
-I${ZFSOSINC}/zfs
#
# For all files, though, we prepend the sys/ccompile.h file to the build which
# has a bunch of defines that are present in OpenSolaris / Illumos, but missing
# from FreeBSD.
#
.for i in ${ZFS_SRC} ${ZSTD_SRC}
CFLAGS.$i+= -include ${ZFSOSINC}/spl/sys/ccompile.h -Wformat -Wall -I${OZFS}/include \
-DNEED_SOLARIS_BOOLEAN
@ -42,11 +58,12 @@ CFLAGS_EARLY.blake3_generic.c+= ${ZFS_EARLY}
CFLAGS_EARLY.blake3_impl_hack.c+= ${ZFS_EARLY}
CFLAGS_EARLY.list.c+= ${ZFS_EARLY}
CFLAGS_EARLY.zfs_zstd.c+= ${ZFS_EARLY}
CFLAGS_EARLY.nvlist.c+= ${ZFS_EARLY}
# Can't use the early flags because there's two conflicting definitions of boolean_t in
# the zfs code that need to be unified.
CFLAGS.nvlist.c+= -I${ZFSOSINC}/spl
CFLAGS.zfs.c+= -I${ZFSOSINC}/spl \
# the zfs code that need to be unified, as well as a number of other hacks for pre-openzfs
# code still in the tree that needs to be fixed.
CFLAGS.zfs.c+= -I${ZFSOSINC}/spl \
-I${SRCTOP}/sys/cddl/contrib/opensolaris/common/lz4 \
-I${ZFSOSINC}/zfs \
-I${OZFS}/include