docs/install.texi: document --enable-numeric-version

Document the configure option to strip non-numeric characters from
the version string.

Testing done:

Build alpine packages in docker, run texinfo on the doc apk package.

Issue: https://github.com/FRRouting/frr/issues/1859
Signed-off-by: Arthur Jones <arthur.jones@riverbed.com>

diff --git a/doc/install.texi b/doc/install.texi
index d0d56804b059ffb54dc92c9c553ff83a29c907fe..e6d4be61dd1fd5be75db9223fa378176ea48454c 100644 (file)
--- a/doc/install.texi
+++ b/doc/install.texi
@@ -109,6 +109,10 @@ of grammar sandbox.
 Turn on some compile options to allow you to run fuzzing tools
 against the system.  This tools is intended as a developer
 only tool and should not be used for normal operations
+@item --enable-numeric-version
+Alpine Linux does not allow non-numeric characters in the version
+string.  With this option, we provide a way to strip out these
+characters for apk dev package builds.
 @end table
 
 You may specify any combination of the above options to the configure