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Re: [bug-patch] Building on mingw

From: Andreas Gruenbacher
Subject: Re: [bug-patch] Building on mingw
Date: Sat, 6 Jun 2009 01:27:21 +0200
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thank you very much for your feedback.

On Sunday, 17 May 2009 8:20:51 Martin Panter wrote:
> I've just successfully built the alpha release from
> ftp://alpha.gnu.org/gnu/patch/patch-2.5.9-109-g70df4e4.tar.gz
> but there were a few issues to sort out. At least the first few of
> these I think you might want to fix in the code.
> 1. The gnulib getopt stuff seemed to be missing getopt_int.h. I seem
> to have fixed this by copying the file straight from gnulib.
> 2. Also in the gnulib stuff, the xstrndup function needs strndup, but
> I don't think this is present on Windows. I just made the code use
> strdup and truncate the string, but perhaps you can get a better
> strndup from gnulib?

I have added the missing files from gnulib now.

> 3. The makefile seemed to want getopt.h to exist in the current
> directory. If I supplied GETOPT_H=gl/lib/getopt.h it fixed the
> problem.

Fixed in the Makefile.in.

> 4. You can't assign stderr into stdout! I guess it works with the gnu
> C library but apparently not with other C libraries. I just removed
> the assignment to get it to compile, because I'm not interested in
> patched output going to stdout for the moment. But I guess the proper
> fix would be to set a variable somewhere to either stdout or stderr,
> and change all the message printouts to use it rather than blindly use
> stdout.

I would prefer to dup/dup2 the file descriptors as needed. Does the latest 
alpha version work for you?

> 5. The "rename" function in Mingw, which uses an MS C runtime library,
> doesn't work if the destination file already exists, so I added
> "remove (target)" calls before it. This is a special Win32 only
> workaround though. Perhaps it would be appropriate to use the "rename"
> stuff out of the gnulib?

Also added from gnulib.

> I also made some changes (in patch-seekable.diff attached) to avoid
> problems with reading LF newline files in Windows text mode (CRLF).

This also looks good, but I still need to check more carefully, and so this 
isn't included in the latest snapshot, yet.

I have uploaded the latest alpha version here:


Are there any remaining problems (aside from the seek issue)?


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