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+
+The 'pkgs' subdirectory of the Tcl source code distribution is meant to be
+a place where the source code distribution of Tcl packages may be placed so
+that they are built, installed, and tested along with Tcl. As originally
+distributed, Tcl re-distributes a number of packages in this location. The
+build systems for Tcl are written so that additional packages may be added,
+or the original packages removed in any number and still have all packages
+present get built, installed, and tested along with Tcl.
+
+In order for a package to work properly under the pkgs subdirectory, it
+needs to conform to the following conventions.
+
+ All files of the package need to be contained in (subdirs of ...) a
+ single subdirectory of the "pkgs" directrory.
+
+ In that subdirectory of "pkgs" there must be an executable file named
+ "configure". When the program "configure" is run, it should generate
+ a file "Makefile" in the current working directory. The "configure"
+ program should be able to accept as command line arguments all the
+ arguments that can be passed to the master unix/configure program. It
+ should also accept the --with-tcl= and --with-tclinclude= options in
+ the conventional way.
+
+ The generated "Makefile" must be one suitable for controlling the operations
+ of a `make` program. The following targets must be defined:
+
+ <default>: Perform a build of the runtime components of the
+ package from sources.
+
+ install: Copy the runtime components of the package into their
+ installed location. Must respect the DESTDIR variable
+ for determining the installation location.
+
+ test: Run the test suite of the package. Must respect the
+ TCLSH_PROG, TESTFLAGS variables.
+
+ clean: Delete all files generated by the default build target.
+
+ distclean: Delete all generated files.
+
+ dist: Produce a copy of the package's source code distribution.
+ Must respect the DIST_ROOT variable determining where to
+ write the generated directory.
+
+Packages that are written to make use of the Tcl Extension Architecture (TEA)
+and that make use of the tclconfig collection of support files, should
+conform to these conventions without further efforts.
+
+These conventions are subject to revision and refinement over time to
+better support the needs of the build system. Efforts will be made to
+keep the TEA support scripts consistent with the demands of this system.
+
+In addition, it is requested that packages also support building with
+Microsoft Visual Studio tools. This means the file win/makefile.vc
+should be included, suitable for use by the nmake program, defining the
+targets <default>, install, test, and clean.
+