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'checking ... result' configure lines (was: what is $ac_t ?)
From: |
Ralf Wildenhues |
Subject: |
'checking ... result' configure lines (was: what is $ac_t ?) |
Date: |
Fri, 17 Sep 2010 19:59:24 +0200 |
User-agent: |
Mutt/1.5.20 (2010-08-04) |
* Eric Blake wrote on Fri, Sep 17, 2010 at 07:01:07PM CEST:
> By the way, the use of "$ac_t" alongside cache results seems to be
> weird. The whole idea was that there used to be setups where there
> was no portable way of printing text without a trailing newline, so
> for those shells, you'd get:
>
> 'checking for ...
> ', delay, '<tab>result'
>
> for a visual appearance of
>
> checking for ...
> result
>
> which is the best you can do, compared to better shells that do
>
> 'checking for... ', delay, 'result'
>
> resulting in the more visually appealing
>
> checking for ... result
By the way, there are packages (like GCC) which allow to run multiple
configure scripts in parallel (by means other than AC_CONFIG_SUBDIRS).
For them, it would be nice if configure provided a means to delay the
"checking for ..." part and print the whole line at once after the test,
making interspersed stdout output a bit more readable. (You wouldn't
be able to spot a hanging configure test from the output either way
anyway ...)
I had half a patch for this in some old branch, lemme see if I can find
the time to finish it eventually.
Cheers,
Ralf