From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Korsgaard Date: Wed, 13 May 2015 00:02:22 +0200 Subject: [Buildroot] [git commit] czmq: unbreak static linking In-Reply-To: <20150512223405.595a8139@free-electrons.com> (Thomas Petazzoni's message of "Tue, 12 May 2015 22:34:05 +0200") References: <20150512184711.BDF2381DA3@busybox.osuosl.org> <20150512210011.4ed7af1d@free-electrons.com> <87a8x9h9uw.fsf@dell.be.48ers.dk> <20150512223405.595a8139@free-electrons.com> Message-ID: <87617xh2tt.fsf@dell.be.48ers.dk> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net >>>>> "Thomas" == Thomas Petazzoni writes: Hi, >> I agree that it would be better if we could get this kind of fixes >> upstream. I don't know how receptive upstream will be as this doesn't >> affect "normal people" though. > Well, upstream zeromq should be able to accept patches making their .pc > file more correct. True. >> That is arguable correct, but things are a bit more complicated as: >> >> - libzerozmq is written in C++ and uses libstdc++ but exposes a C api >> - czmq is a higher level wrapper also written in C >> - Test program (czmq_selftest) is a C program linking against libczmq >> (and in term libzeromq) > Right, but that still doesn't answer whether using gcc to link a > C program against a C++ library is correct or not :-) I believe it is. How are people using E.G. libczmq to know that they need to link with g++ just because a library libczmq uses happens to use C++? >> > * Or using gcc to link with a C++ library is correct, and in this >> > case, libzmq.pc should be fixed to include -lstdc++ in Libs.private. >> >> While this is correct, it is not directly related to this. Czmq doesn't >> use its own .pc file to know how to link the selftest program. > I'm not talking about fixing the czmq .pc file, but the zeromq one. If > zeromq uses C++, then its .pc file should have -lstdc++, no? Ahh, now I get it. Yes, fixing libzmq.pc to have a Libs.privat: -lstdc++ should also work. I'll give it a try. czmq seems to be missing a dependency on host-pkgconf though. -- Venlig hilsen, Peter Korsgaard