From owner-freebsd-current  Thu Feb  7  1: 1:39 2002
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Date: Thu, 07 Feb 2002 01:00:19 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Max Khon <fjoe@iclub.nsu.ru>
Cc: Joe Kelsey <joe@zircon.seattle.wa.us>, obrien@freebsd.org,
	current@freebsd.org
Subject: Re: gcc3.x issues
References: <20020206160611.B181@dragon.nuxi.com> <200202070053.g170rjQ19592@aldan.algebra.com> <20020206170904.C181@dragon.nuxi.com> <15457.55061.55399.596297@zircon.zircon.seattle.wa.us> <20020206172554.A1999@dragon.nuxi.com> <15457.56475.172650.789685@zircon.zircon.seattle.wa.us> <20020207131144.A87654@iclub.nsu.ru>
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Max Khon wrote:
> please calm down. seems that you have never installed gcc from ports.
> 
> gcc 2.95 from ports is installed as gcc295/g++295
> and correctly gets its bits from /usr/local/lib/gcc-lib/xxx,
> gcc 3.0x from ports is named gcc30/g++30 and so on.
> There is no PATH issue. Switching between compilers is as easy as
> setting correct CC/CXX environment/Makefile variables.

And hacking the Makefile a lot to specify command line
arguments in the compiler program definition itself, so
that the /usr/include/g++ files that came with the old
compiler are not used for "make release" and other types
of make targets where DESTDIR is fairly mandatory.

See /usr/src/share/mk/bsd.prog.mk, ~line 14:

.if defined(DESTDIR) && !defined(BOOTSTRAPPING)
CFLAGS+= -I${DESTDIR}/usr/include
CXXINCLUDES+= -I${DESTDIR}/usr/include/g++
.endif


See also /usr/src/share/mk/bsd.lib.mk, ~line 40.

-- Terry

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