Re: git: 84ba2383e7be - main - games/openenroth: unbreak the port's build in pre-C++20 environments

In reply to: Jan Beich : "Re: git: 84ba2383e7be - main - games/openenroth: unbreak the port's build in pre-C++20 environments"
Go to: [ bottom of page ] [ top of archives ] [ this month ]

From: Alexey Dokuchaev <danfe_at_freebsd.org>
Date: Sun, 05 Feb 2023 02:56:59 UTC

On Sat, Feb 04, 2023 at 04:17:06PM +0100, Jan Beich wrote:
> Alexey Dokuchaev <danfe@FreeBSD.org> writes:
> ...
> > +.if !exists(/usr/include/c++/v1/concepts)
> > +BUILD_DEPENDS+=	${LOCALBASE}/include/boost/unordered_map.hpp:devel/boost-libs
> > +USES+=		llvm:13
> > +CXX=		${LLVM_PREFIX}/bin/clang++
> 
> Beware, setting CXX but not CC can break WITH_LTO. Compiler bitcode is
> generally not compatible between different compiler versions/vendors.

Interesting.  At first I've started to spell out all variables (CC, CPP,
CXX) but then decided to test how stable C ABI is. :-)

I don't know about LTO, but failure to link C code generated by different
compilers looks more like the bug in the compilers, no?

./danfe