X-Spam-Check-By: sourceware.org Date: Fri, 6 Jan 2006 13:09:14 +0100 From: "Gerrit P. Haase" Reply-To: "Gerrit P. Haase" Message-ID: <1061381307525.20060106130914@familiehaase.de> To: Ilia Mirkin CC: cygwin AT cygwin DOT com Subject: Re: std::string across DLL boundaries In-Reply-To: <1136353916.11293.416.camel@localhost> References: <1136353916 DOT 11293 DOT 416 DOT camel AT localhost> MIME-Version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm Precedence: bulk List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Ilia wrote: > Hi, > I've run into a problem passing a string ref to a dll: > testdll.C: (I've tried adding __declspec(dllimport/export) too) > void f(std::string& a) { a = "asdf"; } > test.C: > int main(void) { std::string a; f(a); std::cout << a << std::endl; } > If I compile it with static linking, the program works as expected. If f > is in a dll, then I can't get it to work -- different setups either go > into an infinite loop at a = "asdf", or dump core. > If, on the other hand, I do std::string a = "qwer", then it will work > fine -- it seems as though there may be a problem with the allocator in > libg++, though I may just be supplying the wrong flags to gcc. > Could someone either confirm that this is a problem, or, preferably, > provide instructions for getting this to compile "correctly"? (And if > this is a problem, are there known workarounds, is there a PR open > somewhere, etc) Yes, there was already some related discussion and I opened a PR: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24196 > Thanks, > Ilia > P.S. This works fine with MinGW, so it's not some huge windows dll > limitation. Gerrit -- =^..^= http://nyckelpiga.de/donate.html -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/