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Date: Fri, 01 Dec 2006 07:06:06 -0700
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com, autoconf AT gnu DOT org
Subject: Re: cygwin -mno-cygwin AC_CHECK_SIZEOF
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According to Bob Rossi on 12/1/2006 6:57 AM:
> CPPFLAGS="-mno-cygwin" CFLAGS="-mno-cygwin -O0" 
> ./configure --build=mingw32 --enable-experimental-libtool 

EVIL.  --build is for the platform you are BUILDING on (ie. cygwin), NOT
the platform you are compiling for (ie. using -mno-cygwin says you are
cross-compiling for mingw).  By lying to configure, you are asking for
problems.  *Don't do that.*  Also, setting environment variables prior to
./configure is deprecated, because rerunning ./config.status won't
remember that you set those variables.  And since -mno-cygwin is changing
from a regular to a cross-compiler, you really should be setting it in CC
rather than CFLAGS, so that the change happens everywhere.

So, if you INSIST on using the cygwin environment to cross-compile mingw
binaries, you should use:

./configure --build=i686-pc-cygwin --host=i686-pc-mingw32 \
  CC='gcc -mno-cygwin' CXX='g++ -mno-cygwin'

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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