Document the reasoning behind the c_d directory variable

bk: 4728200cEKY2mcyQFu0naq8qdBDDMQ

diff --git a/flock-build b/flock-build
index 5d96b8851bf6fa195f6b18eb96974dd83d962968..5b2a5bbeffa573c677056b64018f38a12fc5102d 100755 (executable)
--- a/flock-build
+++ b/flock-build
@@ -24,6 +24,8 @@ STD="--enable-simulator"
 # * pogo          sparc-sun-solaris2.10
 # * rackety       freebsd-6.1
 
+# HMS: we need $PWD because solaris produces /deacon/backroom when
+# we are in /backroom and in general there is no /deacon/backroom.
 c_d=${PWD:-`pwd`}
 
 SIG=`perl -e 'print rand'`