Add FreeBSD support to OpenZFS

Add the FreeBSD platform code to the OpenZFS repository.  As of this
commit the source can be compiled and tested on FreeBSD 11 and 12.
Subsequent commits are now required to compile on FreeBSD and Linux.
Additionally, they must pass the ZFS Test Suite on FreeBSD which is
being run by the CI.  As of this commit 1230 tests pass on FreeBSD
and there are no unexpected failures.

Reviewed-by: Sean Eric Fagan <[email protected]>
Reviewed-by: Jorgen Lundman <[email protected]>
Reviewed-by: Richard Laager <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Co-authored-by: Ryan Moeller <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Signed-off-by: Ryan Moeller <[email protected]>
Closes #898 
Closes #8987 

1 files changed, 14 insertions, 1 deletions

diff --git a/lib/libzfs/Makefile.am b/lib/libzfs/Makefile.am
index 2747a7e9b..0e1e0a53e 100644
--- a/lib/libzfs/Makefile.am
+++ b/lib/libzfs/Makefile.am
@@ -27,6 +27,15 @@ USER_C = \
 	libzfs_status.c \
 	libzfs_util.c
 
+
+if BUILD_FREEBSD
+USER_C += \
+	os/freebsd/libzfs_fsshare.c \
+	os/freebsd/libzfs_compat.c \
+	os/freebsd/libzfs_ioctl_compat.c \
+	os/freebsd/libzfs_zmount.c
+endif
+
 if BUILD_LINUX
 USER_C += \
 	os/linux/libzfs_mount_os.c \
@@ -35,7 +44,6 @@ USER_C += \
 	os/linux/libzfs_util_os.c
 endif
 
-
 KERNEL_C = \
 	algs/sha2/sha2.c \
 	cityhash.c \
@@ -70,7 +78,12 @@ libzfs_la_LIBADD += \
 	$(top_builddir)/lib/libshare/libshare.la
 endif
 
+if BUILD_FREEBSD
+libzfs_la_LIBADD += -lutil -lgeom
+libzfs_la_LDFLAGS = -version-info 4:0:0
+else
 libzfs_la_LDFLAGS = -version-info 2:0:0
+endif
 
 libzfs_la_LIBADD += -lm $(LIBSSL)