document SUBST_CMD

1 files changed, 22 insertions, 2 deletions

diff --git a/share/man/man5/bsd.port.mk.5 b/share/man/man5/bsd.port.mk.5
index aaca4352069..130e52cb5f4 100644
--- a/share/man/man5/bsd.port.mk.5
+++ b/share/man/man5/bsd.port.mk.5
@@ -1,4 +1,4 @@
-.\" $OpenBSD: bsd.port.mk.5,v 1.209 2008/03/24 14:41:35 ajacoutot Exp $
+.\" $OpenBSD: bsd.port.mk.5,v 1.210 2008/04/07 11:19:40 espie Exp $
 .\"
 .\" Copyright (c) 2000 Marc Espie
 .\"
@@ -24,7 +24,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: March 24 2008 $
+.Dd $Mdocdate: April 7 2008 $
 .Dt BSD.PORT.MK 5
 .Os
 .Sh NAME
@@ -1614,6 +1614,26 @@ if port can only be built on architectures with shared libraries.
 Set to the sub package suffix when building a package in a multi-package port.
 Read-only.
 Used to test for dependencies or to adjust the package name.
+.It Ev SUBST_CMD
+A command that can be used to perform
+.Ev VAR_SUBST
+substitution on arbitrary files.
+In normal mode,
+.Pp
+.Dl ${SUBST_CMD} file1 file2 ...
+.Pp
+will substitute files in place, creating backup copies of them.
+In copy mode,
+.Pp
+.Dl ${SUBST_CMD} -c src1 dest1 src2 dest2
+.Pp
+will copy files over while performing the substitution, as suitable for
+copying template files over from
+.Pa ${FILESDIR}
+to
+.Pa ${PREFIX} ,
+for instance.
+Read-only.
 .It Ev SUBST_VARS
 Make variables whole values get substituted to create the actual package
 information.