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Date:	Wed, 09 Jan 2013 17:02:59 +0400
From:	Fedin Pavel <p DOT fedin AT samsung DOT com>
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Subject:	Re: Rebuilding make
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On 09.01.2013 14:57, Fedin Pavel wrote:
> 1. doc/fdl.texi and doc/make-stds.texi files are missing from the 
> archive.
> 2. configure seems to incorrectly determine HAVE_DOS_PATHS as true. 
> This breaks $abspath() function.
>
>  I solved (1) by adding these files from the original UNIX archive. Of 
> course i can solve (2) by tweaking config/dospaths.m4, however perhaps 
> i don't know something ? How do you build make ?
  Just FYI: i have tweaked dospaths.m4 and built a working make. After 
this i successfully patched it to use spawn(). For benchmarking i used 
'all' then 'clean' targets on make's own source code.
--- cut ---
p DOT fedin AT fedinw7x64 /usr/src/make-3.82.90-1
$ time make.old

[skip]

real    0m45.759s
user    0m23.206s
sys     0m19.410s

p DOT fedin AT fedinw7x64 /usr/src/make-3.82.90-1
$ time make.old clean

[skip]

real    0m7.520s
user    0m2.767s
sys     0m4.268s

p DOT fedin AT fedinw7x64 /usr/src/make-3.82.90-1
$ time make

[skip]

real    0m31.869s
user    0m16.470s
sys     0m14.061s

p DOT fedin AT fedinw7x64 /usr/src/make-3.82.90-1
$ time make clean

[skip]

real    0m2.740s
user    0m0.748s
sys     0m1.643s

p DOT fedin AT fedinw7x64 /usr/src/make-3.82.90-1
$
--- cut ---
  'clean' target runs especially faster, you see the difference with a 
naked eye. I believe in case of gcc there's disk access factor.

-- 
  Kind regards
  Pavel Fedin
  Expert engineer, Samsung Moscow research center


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