Message-Id:	<3.0.1.16.19970612222210.50efed78@hal.nt.tuwien.ac.at>
Date:	Thu, 12 Jun 1997 22:22:10
To:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
From:	Anton Helm <tony AT nt DOT tuwien DOT ac DOT at>
Subject:	Re: Strange behavior of GNU-make (WinNT 4.0)
Cc:	djgpp AT delorie DOT com
In-Reply-To:	<Pine.SUN.3.91.970605111248.5841J-100000@is>
References:	<3 DOT 0 DOT 1 DOT 16 DOT 19970604172045 DOT 2a97752c AT hal DOT nt DOT tuwien DOT ac DOT at>
Mime-Version:	1.0

At 11:13 1997-06-05 +0300, you wrote:
>
>On Wed, 4 Jun 1997, Anton Helm wrote:
>
>> I have been using these makefiles for more than a year with several
>> versions of GNU-make on various UNIX platforms and MS-DOS without
>> problems.
>> 
>> What's happening in WinNT 4.0 ?
>
>Are you saying that these same Makefiles worked with that same
>Make 3.75 on MS-DOS, but fail as you describe on NT?  

Yes.

>If so, please
>run Make on both platforms with -d and -p switches, redirect the
>output to a file and examine the log for the differences.  This should
>unlock the problem.

Hmmm. As I stated before it acts like there would be a file named 'all'
which is up to date. Meanwhile I have also detected some strange behavior
of gunzip (tells me that the output file already exists...) which gave me a
hint where to search for a bug, and....... BINGO !

From the gzip sources I got that piece of source code that is testing files
and created a little test program (available upon request). 

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!! I found out that when running WinNT4.0 the stat() function  is returning 0 !!
!! for non-existing files (no matter if file system is FAT or NTFS).          !!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Here is a dump of the returned stat structure for a non-existing file:

st_dev   = 3
st_ino   = 0
st_dmode = 0
st_uid   = 42
st_gid   = 42
st_rdev  = 0
st_size  = 0
st_atime = 312768000

Due to the functionality of a make utility I strongly suspect that it is using 
stat() or one of the related functions for checking files. This would explain 
the misbehavior of make.

As I have neither knowledge of how the stat() function is implemented nor detailed
knowledge of WinNT, I would like to ask if someone out there could have a look at
the libc source to fix this. Maybe the other related functions are buggy too.

Tony






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Dipl.-Ing. Anton HELM            * mailto:tony AT nt DOT tuwien DOT ac DOT at
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