Index: tools/build/options/WITHOUT_SCTP_SUPPORT
===================================================================
--- /dev/null
+++ tools/build/options/WITHOUT_SCTP_SUPPORT
@@ -0,0 +1,4 @@
+Disable support for the
+.Xr sctp 4
+Stream Control Transmission Protocol
+loadable kernel module.
Index: tools/build/options/WITH_LIB32
===================================================================
--- /dev/null
+++ tools/build/options/WITH_LIB32
@@ -0,0 +1,3 @@
+On 64-bit platforms, build the 32-bit library set and a
+.Nm ld-elf32.so.1
+runtime linker.
Index: tools/build/options/WITH_OFED
===================================================================
--- /dev/null
+++ tools/build/options/WITH_OFED
@@ -0,0 +1,3 @@
+Build the
+.Dq "OpenFabrics Enterprise Distribution"
+Infiniband software stack, including kernel modules and userspace libraries.
Index: tools/build/options/WITH_ZFS
===================================================================
--- /dev/null
+++ tools/build/options/WITH_ZFS
@@ -0,0 +1,3 @@
+Build the ZFS file system kernel module, libraries, and user commands.
+Also enable ZFS support in utilities and libraries which implement
+ZFS-specific functionality.