[frogs] Make, make test and make doc

["Trevor Daniels" <t.daniels@xxxxxxxxxxx>]

As I'm fairly new to LilyPond development I'm still learning how 
best to use some of the basic tools.  In particular, make with 
various targets takes ages to run, but it is essential for checking 
if your mods are going to cause any un-anticipated problems.  I am 
wondering if there are any short-cuts to speed up the process.

For example, make [default] has to be used frequently during code 
development just to check for C++ compile and linkage errors. 
Granted this takes only a few minutes to run, but it is still 
annoying to see it visiting all the Documentation directories to 
check no snippet has been changed when I know none of them has been 
touched.  I've found temporarily renaming the Documentation folder 
short-circuits some of this, but is there a better way?

The most time-consuming is make doc after make doc-clean.  To check 
whether your mods have changed anything all we really need to do is 
make sure all the snippets compile without error and the Internals 
Reference builds correctly.  There's no need to generate html and 
pdf versions of all the manuals in several languages, and since they 
generate so many errors anyway picking up any new error is quite 
impossible.  Can this process be short-circuited in any way?

Trevor




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