Document the EVAL_PREFIX (and the related <dirname>_DEFAULT) definitions.

1 files changed, 23 insertions, 1 deletions

diff --git a/Packages.txt b/Packages.txt
index 1c4f8e524b6..4aead84edee 100644
--- a/Packages.txt
+++ b/Packages.txt
@@ -1,4 +1,4 @@
-# $NetBSD: Packages.txt,v 1.147 2001/03/27 03:19:43 hubertf Exp $
+# $NetBSD: Packages.txt,v 1.148 2001/03/29 11:20:57 agc Exp $
 ###########################################################################
 
 			==========================
@@ -1080,6 +1080,28 @@ When choosing which of these variables to use, follow the following rules:
    package. X11PREFIX will be set to ${X11BASE} if xpkgwedge is not installed,
    and to ${LOCALBASE} if xpkgwedge is installed.
 
+ * If xpkgwedge is installed, it is possible to have some packages installed in
+   X11BASE and some in LOCALBASE. To determine the prefix of an installed
+   package, the EVAL_PREFIX definition can be used. It takes pairs in the
+   format DIRNAME=<package>, and the make(1) variable DIRNAME will be set
+   to the prefix of the installed package <package>, or ${X11PREFIX} if the
+   package is not installed.
+
+   This is best illustrated by example.
+
+   The following lines are taken from pkgsrc/wm/scwm/Makefile:
+
+	EVAL_PREFIX+=	GTKDIR=gtk+
+	CONFIGURE_ARGS+=	--with-guile-prefix=${LOCALBASE}	\
+				--with-gtk-prefix="${GTKDIR}"		\
+				--enable-multibyte
+
+   Specific defaults can be defined for the packages evaluated using
+   EVAL_PREFIX, by using a definition of the form:
+
+	GTKDIR_DEFAULT= ${LOCALBASE}
+
+   where "GTKDIR" corresponds to the first definition in the EVAL_PREFIX pair.
 
  7.2 Main targets
  ================