GNU bug report logs - #8031
feature request: slow "make clean"

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ralf Hemmecke <hemmecke <at> gmail.com>
To: bug-automake <at> gnu.org
Subject: feature request: slow "make clean"
Date: Sun, 13 Feb 2011 20:52:03 +0100

This is a copy of
http://lists.gnu.org/archive/html/automake/2011-02/msg00017.html
It's not really a bug, but rather a feature request.

Ralf

-------- Original Message --------
Subject: slow "make clean"
Date: Sat, 12 Feb 2011 23:46:55 +0100
From: Ralf Hemmecke <hemmecke <at> gmail.com>
To: automake <at> gnu.org

I've a project that must use subdir-objects, because of filename clashes 
in subdirectories (non-recursive build).

AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])

I just have

lib_LTLIBRARIES = libfoo.la
check_PROGRAMS = ${TESTSUITE_TESTS} ${TESTSUITE_XFAIL_TESTS}

but quite a lot of files.

The generated Makefile contains a target "mostlyclean-compile" which has
about 1500 lines that look like

  -rm -f src/foo/foo.$(OBJEXT)
  -rm -f src/foo/foo.lo
  ...

Of course it takes ages to say "make clean". About 10 sec.

Wouldn't it be faster if there were just one call to rm or at least
block the number of arguments to rm so that the maximal argument lenght
is not exceeded?

Any idea how I can speed that up?

Ralf

Message #8 received at 8031 <at> debbugs.gnu.org (full text, mbox):

From: Stefano Lattarini <stefano.lattarini <at> gmail.com>
To: Ralf Hemmecke <hemmecke <at> gmail.com>
Cc: 8031 <at> debbugs.gnu.org
Subject: Re: bug#8031: feature request: slow "make clean"
Date: Mon, 25 Jun 2012 11:48:57 +0200

forcemerge 10697 8031
close 8031
thanks

On 02/13/2011 08:52 PM, Ralf Hemmecke wrote:
> This is a copy of
> http://lists.gnu.org/archive/html/automake/2011-02/msg00017.html
> It's not really a bug, but rather a feature request.
> 
> Ralf
> 
> -------- Original Message --------
> Subject: slow "make clean"
> Date: Sat, 12 Feb 2011 23:46:55 +0100
> From: Ralf Hemmecke <hemmecke <at> gmail.com>
> To: automake <at> gnu.org
> 
> I've a project that must use subdir-objects, because of filename clashes in subdirectories (non-recursive build).
> 
> AM_INIT_AUTOMAKE([-Wall -Werror foreign subdir-objects])
> 
> I just have
> 
> lib_LTLIBRARIES = libfoo.la
> check_PROGRAMS = ${TESTSUITE_TESTS} ${TESTSUITE_XFAIL_TESTS}
> 
> but quite a lot of files.
> 
> The generated Makefile contains a target "mostlyclean-compile" which has
> about 1500 lines that look like
> 
>   -rm -f src/foo/foo.$(OBJEXT)
>   -rm -f src/foo/foo.lo
>   ...
> 
> Of course it takes ages to say "make clean". About 10 sec.
> 
> Wouldn't it be faster if there were just one call to rm or at least
> block the number of arguments to rm so that the maximal argument lenght
> is not exceeded?
> 
> Any idea how I can speed that up?
> 
> Ralf
> 
This issue has been solved addressing this later bug report:
<http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10697>

I'm thus merging the present bug#8031 with that, and closing it.

Regards,
  Stefano

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