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Date:      Fri, 26 Oct 2001 23:17:47 +0300
From:      Ruslan Ermilov <ru@FreeBSD.ORG>
To:        Terry Lambert <tlambert2@mindspring.com>
Cc:        Peter Wemm <peter@wemm.org>, alpha@FreeBSD.ORG, developers@FreeBSD.ORG
Subject:   Re: cvs commit: src Makefile.inc1
Message-ID:  <20011026231747.A33697@sunbay.com>
In-Reply-To: <3BD98E91.4FFBE52E@mindspring.com>; from tlambert2@mindspring.com on Fri, Oct 26, 2001 at 09:25:53AM -0700
References:  <20011025170119.509303808@overcee.netplex.com.au> <3BD90656.63D7EB89@mindspring.com> <20011026115148.B48208@sunbay.com> <3BD98E91.4FFBE52E@mindspring.com>

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On Fri, Oct 26, 2001 at 09:25:53AM -0700, Terry Lambert wrote:
> Ruslan Ermilov wrote:
> > 
> > On Thu, Oct 25, 2001 at 11:44:38PM -0700, Terry Lambert wrote:
> > > Peter Wemm wrote:
> > > > One thing that would be nice, and I have not had the patience to sit down
> > > > and figure it out yet, is find some way to specify and use an *external*
> > > > cross compiler and/or toolchain to do the cross build and exclude the
> > > > in-tree compiler and/or toolchain.
> > >
> > > Setting DESTDIR causes include and library path overrides
> > > that cause the system default paths to be used, instead of
> > > the correct paths for the cross compiler.  See /usr/share/mk
> > > for DESTDIR defined variant behaviour, for details...
> > >
> > Setting DESTDIR is OK since revision 1.219.
> 
> Please see the current version of bsd.lib.mk (1.99), which has:
> 
> 	.if defined(DESTDIR) && !defined(BOOTSTRAPPING)
> 	CFLAGS+= -I${DESTDIR}/usr/include
> 	CXXINCLUDES+= -I${DESTDIR}/usr/include/g++
> 	.endif
> 
> This precludes use of other than the system toolchain; in
> particular, you will get the wrong version of typeinfo and
> other headers when compiling C++ code, which are compiler
> specific (and even GCC version specific).
> 
> I think there are issues with the standard headers for C,
> as well, should the toolchain derived version be different
> than the one for the tools you are using (e.g. quad vs.
> long long, etc.).
> 
> The problem is that this jams the system include paths in
> front of the paths intended to override them.
> 
> As an exercise, try compiling what you can of FreeBSD
> using the TenDRA or the DEC (Compaq) Alpha compilers.
> 
Excuse me, but I thought Peter was talking about pre-compiled
toolchain in EXTERNAL_CROSS_TOOLS=/usr/local/ia64/bin.


Cheers,
-- 
Ruslan Ermilov		Oracle Developer/DBA,
ru@sunbay.com		Sunbay Software AG,
ru@FreeBSD.org		FreeBSD committer,
+380.652.512.251	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age

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