Date: Sat, 31 Jan 2015 06:00:35 +0100
From: Jan Beich <jbeich@vfemail.net>
To: Don Lewis <truckman@FreeBSD.org>
Cc: ports@FreeBSD.org
Subject: Re: testing the value of ${CXX} in ports Makefile
Message-ID: <fvar-v91o-wny@vfemail.net>
References: <201501300345.t0U3jHwb008745@gw.catspoiler.org>
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Don Lewis <truckman@FreeBSD.org> writes:
> PORTNAME= junk
> PORTVERSION= 0.0.0
> CATEGORIES= devel
> DISTFILES=
>
> MAINTAINER= truckman@FreeBSD.org
> COMMENT= junk
>
> USE_GCC= 4.9+
>
> .include <bsd.port.pre.mk>
>
> post-patch:
> echo CXX=${CXX}
> .if ${CXX} == g++49
This idiom may lead to crashes. According to the wiki[1] mixing
libstdc++ and libc++ is only supported when both are linked against
libcxxrt. lang/gcc by default use libsupc++, so you'd have to add
USES= compiler:gcc-c++11-lib
to force the port use devel/libc++. Also, the following wouldn't work
.if ${CHOSEN_COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} == 49
because COMPILER_VERSION or COMPILER_FEATURES are evaluated against
COMPILER_TYPE, not CHOSEN_COMPILER_TYPE.
[1] https://wiki.freebsd.org/NewC++Stack#Mixing_Libraries_using_Libc.2B-.2B-_and_Libstdc.2B-.2B-
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