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, 26 insertions, 12 deletions

diff --git a/config/zfs-build.m4 b/config/zfs-build.m4
index 2ee9b8eb9..016c0fc09 100644
--- a/config/zfs-build.m4
+++ b/config/zfs-build.m4
@@ -157,6 +157,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_BOOL_COMPARE
 	ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION
+	ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_ZERO_LENGTH
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_OMIT_FRAME_POINTER
 	ZFS_AC_CONFIG_ALWAYS_CC_NO_IPA_SRA
 	ZFS_AC_CONFIG_ALWAYS_CC_ASAN
@@ -173,13 +174,6 @@ AC_DEFUN([ZFS_AC_CONFIG], [
         dnl # Remove the previous build test directory.
         rm -Rf build
 
-	AC_ARG_VAR([TEST_JOBS],
-	    [simultaneous jobs during configure (defaults to $(nproc))])
-	if test "x$ac_cv_env_TEST_JOBS_set" != "xset"; then
-		TEST_JOBS=$(nproc)
-	fi
-	AC_SUBST(TEST_JOBS)
-
 	ZFS_CONFIG=all
 	AC_ARG_WITH([config],
 		AS_HELP_STRING([--with-config=CONFIG],
@@ -197,6 +191,16 @@ AC_DEFUN([ZFS_AC_CONFIG], [
 
 	ZFS_AC_CONFIG_ALWAYS
 
+
+	AM_COND_IF([BUILD_LINUX], [
+		AC_ARG_VAR([TEST_JOBS],
+		    [simultaneous jobs during configure (defaults to $(nproc))])
+		if test "x$ac_cv_env_TEST_JOBS_set" != "xset"; then
+			TEST_JOBS=$(nproc)
+		fi
+		AC_SUBST(TEST_JOBS)
+	])
+
 	case "$ZFS_CONFIG" in
 		kernel) ZFS_AC_CONFIG_KERNEL ;;
 		user)	ZFS_AC_CONFIG_USER   ;;
@@ -405,7 +409,7 @@ dnl # Using the VENDOR tag from config.guess set the default
 dnl # package type for 'make pkg': (rpm | deb | tgz)
 dnl #
 AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
-	AC_MSG_CHECKING([linux distribution])
+	AC_MSG_CHECKING([os distribution])
 	if test -f /etc/toss-release ; then
 		VENDOR=toss ;
 	elif test -f /etc/fedora-release ; then
@@ -428,6 +432,8 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 		VENDOR=debian ;
 	elif test -f /etc/alpine-release ; then
 		VENDOR=alpine ;
+	elif test -f /bin/freebsd-version ; then
+		VENDOR=freebsd ;
 	else
 		VENDOR= ;
 	fi
@@ -447,13 +453,17 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 		lunar)      DEFAULT_PACKAGE=tgz  ;;
 		ubuntu)     DEFAULT_PACKAGE=deb  ;;
 		debian)     DEFAULT_PACKAGE=deb  ;;
+		freebsd)    DEFAULT_PACKAGE=pkg  ;;
 		*)          DEFAULT_PACKAGE=rpm  ;;
 	esac
 	AC_MSG_RESULT([$DEFAULT_PACKAGE])
 	AC_SUBST(DEFAULT_PACKAGE)
 
-	DEFAULT_INIT_DIR=$sysconfdir/init.d
 	AC_MSG_CHECKING([default init directory])
+	case "$VENDOR" in
+		freebsd)    DEFAULT_INIT_DIR=$sysconfdir/rc.d  ;;
+		*)          DEFAULT_INIT_DIR=$sysconfdir/init.d;;
+	esac
 	AC_MSG_RESULT([$DEFAULT_INIT_DIR])
 	AC_SUBST(DEFAULT_INIT_DIR)
 
@@ -470,6 +480,7 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 		lunar)      DEFAULT_INIT_SCRIPT=lunar  ;;
 		ubuntu)     DEFAULT_INIT_SCRIPT=lsb    ;;
 		debian)     DEFAULT_INIT_SCRIPT=lsb    ;;
+		freebsd)    DEFAULT_INIT_SCRIPT=freebsd;;
 		*)          DEFAULT_INIT_SCRIPT=lsb    ;;
 	esac
 	AC_MSG_RESULT([$DEFAULT_INIT_SCRIPT])
@@ -485,6 +496,7 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 		sles)       DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
 		ubuntu)     DEFAULT_INITCONF_DIR=/etc/default   ;;
 		debian)     DEFAULT_INITCONF_DIR=/etc/default   ;;
+		freebsd)    DEFAULT_INITCONF_DIR=$sysconfdir/rc.conf.d;;
 		*)          DEFAULT_INITCONF_DIR=/etc/default   ;;
 	esac
 	AC_MSG_RESULT([$DEFAULT_INITCONF_DIR])
@@ -506,7 +518,9 @@ dnl # Default ZFS package configuration
 dnl #
 AC_DEFUN([ZFS_AC_PACKAGE], [
 	ZFS_AC_DEFAULT_PACKAGE
-	ZFS_AC_RPM
-	ZFS_AC_DPKG
-	ZFS_AC_ALIEN
+	AS_IF([test x$VENDOR != xfreebsd], [
+		ZFS_AC_RPM
+		ZFS_AC_DPKG
+		ZFS_AC_ALIEN
+	])
 ])