Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Thu, 17 Oct 2002 14:16:43 +1000 From: Anurag Sharma To: cygwin@cygwin.com Subject: errno reset when using thread enabled gcc Message-Id: <20021017141643.0356fc8a.anurag@proximity.com.au> Organization: Proximity Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Hi All, I have come across a strange behaviour using native gcc on cygwin. I understand that this issue is not 100% relevant to this list, but I am hoping some one might have come across this issue before. Apologies for any incovinience. I have posted the same on newlib mailing list too. Consider this short code: int fd = ::open("/tmp/errnotest", O_RDONLY | O_BINARY); if (fd == -1) { std::cerr << "open failed, errno=" << errno << ", strerror=" << strerror(errno) << std::endl; std::cerr << "open failed, errno=" << errno << ", strerror=" << strerror(errno) << std::endl; } If I build the gcc compiler by providing --enable-threads=single option in the configure stage, following is the output : open failed, errno=2, strerror=No such file or directory open failed, errno=2, strerror=No such file or directory This is of course expected. Hoewever if I build the compiler by providing --enable-threads=posix option in the configure stage, the output is as follows : open failed, errno=2, strerror=No such file or directory open failed, errno=0, strerror=No error That is , after the first call to errno, it is reset!! Has anyone else experiened this before? Can anyone please help find out what exactly is going wrong? Regards, Anurag -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/