On 7 April 2016 at 07:21, Don Morrison <d...@cmu.edu> wrote:
> However Roan's use of SQLite is not essential to Roan's usefulness (well, > it's probably not all that useful to most people anyway, only to those > interested in change ringing, a small audience). There's really only one, > tiny corner of functionality in Roan it supports. While sqlite3 is easily > obtained, it would seem polite to allow use of Roan without it, simply > disabling the two functions that depend upon it. The "disable if the > cl-sqlite stuff is not present" part I can easily do. What's causing me to > scratch my head is figuring out how to set things up so Roan will still > install whether or not the sqlite3 binary library is present. > I had a similar issue when I contributed GSSAPI support to Postmodern. I clearly did not want to have Postmodern depend on cl-gss, which will fail to load if the Kerberos client libraries are not installed on the machine (it will also completely fail on Windows). The solution I chose was to simply require the user to manually load cl-gss (using QL or whatever mechanism they feel like). When GSSAPI authentication is requested, Postmodern will check if the CL-GSS package is available, and then call the relevant functions through symbols looked up using FIND-SYMBOL. If the cl-gss system has not been loaded, Postmodern will issue a restartable error requesting the user to to load the system before continuing. Regards, Elias