From 609b7b269d7146662990e390ab542ed383be1ac5 Mon Sep 17 00:00:00 2001
From: Enji Cooper <ngie@FreeBSD.org>
Date: Wed, 19 Apr 2017 20:45:46 +0000
Subject: [PATCH] Add a knob, WITH*_RPCBIND_WARMSTART_SUPPORT, to allow the
 end-user to build rpcbind(8) with/without warmstart support.

The knob defaults to off to preserve POLA for the feature.

See rpcbind(8) for more details about the warmstart feature.

MFC after:	7 weeks
Relnotes:	yes
Sponsored by:	Dell EMC Isilon
---
 share/mk/src.opts.mk                               | 1 +
 tools/build/options/WITH_RPCBIND_WARMSTART_SUPPORT | 4 ++++
 usr.sbin/rpcbind/Makefile                          | 4 ++++
 3 files changed, 9 insertions(+)
 create mode 100644 tools/build/options/WITH_RPCBIND_WARMSTART_SUPPORT

diff --git a/share/mk/src.opts.mk b/share/mk/src.opts.mk
index 820991328939..857061c8bfc8 100644
--- a/share/mk/src.opts.mk
+++ b/share/mk/src.opts.mk
@@ -186,6 +186,7 @@ __DEFAULT_NO_OPTIONS = \
     OFED \
     OPENLDAP \
     REPRODUCIBLE_BUILD \
+    RPCBIND_WARMSTART_SUPPORT \
     SHARED_TOOLCHAIN \
     SORT_THREADS \
     SVN \
diff --git a/tools/build/options/WITH_RPCBIND_WARMSTART_SUPPORT b/tools/build/options/WITH_RPCBIND_WARMSTART_SUPPORT
new file mode 100644
index 000000000000..e1209e88fe01
--- /dev/null
+++ b/tools/build/options/WITH_RPCBIND_WARMSTART_SUPPORT
@@ -0,0 +1,4 @@
+.\" $FreeBSD$
+Set to build
+.Xr rpcbind 8
+with warmstart support.
diff --git a/usr.sbin/rpcbind/Makefile b/usr.sbin/rpcbind/Makefile
index 0efb665b2a98..57907d3be871 100644
--- a/usr.sbin/rpcbind/Makefile
+++ b/usr.sbin/rpcbind/Makefile
@@ -14,6 +14,10 @@ CFLAGS+= -DPORTMAP
 CFLAGS+= -DINET6
 .endif
 
+.if ${MK_RPCBIND_WARMSTART_SUPPORT} != "no"
+CFLAGS+= -DWARMSTART
+.endif
+
 .if ${MK_TCP_WRAPPERS} != "no"
 CFLAGS+= -DLIBWRAP
 LIBADD+= wrap