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Re: cygwin -mno-cygwin AC_CHECK_SIZEOF

From: Howard Chu
Subject: Re: cygwin -mno-cygwin AC_CHECK_SIZEOF
Date: Thu, 30 Nov 2006 20:10:24 -0800
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20061116 Netscape/7.2 (ax) Firefox/1.5 SeaMonkey/1.5a

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.
 Director, Highland Sun
 OpenLDAP Core Team  

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