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Date: Thu, 30 Nov 2006 20:10:24 -0800
From: Howard Chu <hyc AT highlandsun DOT com>
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To: Eric Blake <ebb9 AT byu DOT net>
CC: autoconf AT gnu DOT org, cygwin AT cygwin DOT com, bob_rossi AT cox DOT net
Subject: Re: cygwin -mno-cygwin AC_CHECK_SIZEOF
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Eric Blake wrote:
>> What is the best way to resolve something like this?
>>     
>
> Perhaps experiment with a cygwin text mount, so that cygwin cat will
> ignore the \r.  Or experiment with the recent add-on to cygwin's bash,
> where exporting SHELLOPTS with the cygwin-specific shell option igncr set
> will tell subsequent /bin/sh invocations to strip \r from command
> substitution.  Or rather than trying to cross-compile, with mixed results
> between mingw test binaries but cygwin build framework; just use the MSYS
> environment so that your entire build process is native.
>
> Actually, maybe it would work if you invoked configure properly - since
> - -mno-cygwin is requesting a cross-compiler, you REALLY should be invoking
> it like this:
> ./configure --host=i686-pc-mingw32 --build=i686-pc-cygwin \
>   CC='gcc -mno-cygwin'
> And the fact that you are now telling configure the truth that you are
> cross-compiling, even though the cross binaries are executable, may be
> enough for autoconf to try harder for discovering how AC_CHECK_SIZEOF
> should behave without tripping up on line endings (and if that is not the
> case, maybe we should consider patching autoconf to make it happen that way).
>   

I was with you up to the end. You should have no expectation that 
anything compiled for the target can execute reasonably on the build 
host in a cross-compiling environment.

As usual, I think just using MSYS is the best solution.

-- 
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/


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