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From:	"edward" <tailbert AT yahoo DOT com>
To:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>,
	"Akim Demaille" <akim AT epita DOT fr>
Cc:	<cygwin-apps AT sources DOT redhat DOT com>, <autoconf AT gnu DOT org>
References:	<035401c0ac91$3ba21fd0$0200a8c0 AT lifelesswks><022001c0accf$29b724d0$0200a8c0 AT lifelesswks> <mv4vgpb5qtc DOT fsf AT nostromo DOT lrde DOT epita DOT fr> <009901c0ad30$edf3d7b0$0200a8c0 AT lifelesswks>
Subject:	Re: updated win32 macro
Date:	Thu, 15 Mar 2001 04:33:43 -0500
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----- Original Message -----
From: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To: "Akim Demaille" <akim AT epita DOT fr>
Cc: <cygwin-apps AT sources DOT redhat DOT com>; <autoconf AT gnu DOT org>
Sent: Thursday, March 15, 2001 4:18 AM
Subject: Re: updated win32 macro


> ----- Original Message -----
> From: "Akim Demaille" <akim AT epita DOT fr>
> To: "Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
> Cc: <cygwin-apps AT sources DOT redhat DOT com>; <autoconf AT gnu DOT org>
> Sent: Thursday, March 15, 2001 8:23 PM
> Subject: Re: updated win32 macro
>
>
> >
> > | Sample code to use it in configure.in, when the program _needs_ the
> > | win32 API:
> > |
> > | AC_CANONICAL_HOST
> > |
> > | case "${host}" in
> > | *-*-cygwin*)
> > |         AC_PROG_CC_WIN32
> > |         if $ac_cc_win32; then
> > |         dnl do nothing here - any header checks /library checks etc
> > | later in configure.in will now pass
> > |         else
> > |             echo "configure: error: Win32 API needed and no
> acceptable
> > | cc could be found" 1>&2;
> > |             exit 1;
> > |         fi        ;;
> > | esac
> >
> > My opinion is that AC_PROG_CC_WIN32 should contain an AC_REQUIRE of
> > AC_CANONICAL_HOST, and should ensure the case $host itself.
> >

that's my suggestion as well.

> Why? There is no side effect if it is tested for on platforms other than
> cygwin. And by being a little bit more generic less changes will be
> needed to work with (say) WINE. Or on a cross-compile chain.

you don't lose any generality. what you gain is assurance that you are
testing on a relevant platform.

> And the developer writing the configure test will still need to decide
> what to do if it fails && they are compiling on cygwin, so they still
> need a case statement.

ps. you might consider extending it to handle optional arguments, a-la

AC_PROG_CC_WIN32(HAVE_WIN32, [echo imma winnie], [echo imma no win])

implementation is left as an exercise to you =)

>
> Rob

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