Re: [PATCH] libtool: minimise forks per invocation on cygwin and mingw.

[Peter O'Gorman]

On 12/08/2011 04:21 AM, Gary V. Vaughan wrote:
> The recently pushed series of patches included the controversial
> introduction of an additional 3 forks per invocation, which might
> add a minute or two of wall-clock time to giant builds on windows.
> By assuming that windows will run shell scripts on some shell with
> all the modern optional features that libtool wants, this patch
> eliminates even those 3 new forks.
>
> Okay to push?

Hi Gary,

The whole reason these checks were done in configure and not in libtool 
was to avoid these forks, and the slow down involved. We did a lot of 
work at speeding up libtool so that non-portable tools such as dolt 
would not be necessary, including moving large chunks of compile mode 
script closer the the top of libtool so that it would execute faster.

Any additional forks will slow down the script and should be avoided on 
all platforms.

Simply removing $(SHELL) from the LIBTOOL variable should fix the bug 
that this is attempting to fix, without slowing down libtool.

Peter