Add note that building from CVS requires bison and flex, whereas

building from a distribution tarball does not.

diff --git a/doc/src/sgml/cvs.sgml b/doc/src/sgml/cvs.sgml
index 8627444c76ba7efe21a9e3463dd7534bf34a83b6..36b59846e58df2942f81ea818762188162b04f94 100644 (file)
--- a/doc/src/sgml/cvs.sgml
+++ b/doc/src/sgml/cvs.sgml
@@ -1,4 +1,4 @@
-
+
 
 
  
@@ -157,11 +157,19 @@ cvs update
   
    CVS has deficiencies.  For example,
    generating diffs that add or remove files requires write access to the
-   CVS repository.  To work around such difficiencies, use
+   CVS repository.  To work around that deficiency, use
    cvsutils, which is packaged in several
    operating systems, and is available in source form at 
    url="http://www.red-bean.com/cvsutils/">.
   
+
+  
+   Note that building PostgreSQL from a CVS
+   pull requires reasonably up-to-date versions of bison
+   and flex, which are not needed to build from a distribution
+   tarball because the files made with them are pre-built in a tarball.
+   Otherwise the tool requirements are the same as building from source.
+