[MPlayer-dev-eng] [PATCH] configure: much faster configure --help

[Alexander Strasser]

Diego Biurrun wrote:
> On Mon, Feb 11, 2013 at 05:40:53PM +0100, Erik Auerswald wrote:
> > 
> > MPlayer's configure does a lot of work before checking command line
> > options. This includes updating of an ffmpeg git repository before
> > producing help output, even when only asked for help.
> > 
> > The attached patch rearranges configure's help output code to be in
> > front of ffmpeg repo checks and updates and introduces a new check,
> > if the first command line option is --help or -h and prints the help
> > immediately.
> > 
> > This drastically speeds up checking for available configure options,
> > if done the common way of "./configure --help". If the --help resp.
> > -h option is somewhere else on configure's command line, the (kept)
> > existing check will find this after doing all the initial setup
> > work, taking much longer overall.
> 
> I'm not really convinced of the usefulness of this in the first place,
> but even then I consider it overkill.  Just check for --help/-h early.

  I do not understand your reasoning.

  The latest version Erik and I worked out:

  1. Detects the help option in every position
  2. Is consistent with current configure behaviour
  3. Does not duplicate the check for the help option


  Alexander