Refine README how to build the library source from the repository

* README.md (Installation and Usage): Add information that autogen.sh
should be launched first if building from the development repository.

diff --git a/README.md b/README.md
index 38fbd32..8c06f9e 100644 (file)
--- a/README.md
+++ b/README.md
@@ -42,7 +42,8 @@ Please address bug reports to [mailing list](mailto:bdwgc@lists.opendylan.org).
 The configuration and build scripts for this package were generated by
 Automake/Autoconf.  "./configure; make; sudo make install" in this
 directory should work.  For a more customized build, see the output of
-"./configure --help".
+"./configure --help".  To build it from the development repository,
+"./autogen.sh" should be executed first.
 
 Note that much of the content of this library is in the header files.
 However, two small libraries are built and installed: