I'm digging out of my list backlog, and I noticed you didn't get a reply. So, this is just in case you haven't figured it out yet.
On Wed, 14 Jan 2004 [EMAIL PROTECTED] wrote: > I have a program that uses shared memory functions shmget() and shmat() and > that works fine under Linux. > > My problem is that I couldn't find how to link it with Cygwin, although I > installed le last full package, cygwin1.dll is in the PATH, any other > compilations and linkages works fine. > > All the info I could find is the thread starting at > http://www.cygwin.com/ml/cygwin/2002-08/msg01296.html, and the links to > cygipc and cygserver. But this info does not address this (supposed to be > trivial) linkage problem. > > Where is the relevant info ? > At the time you wrote this, your best option was cygipc. You could have read: /usr/share/doc/Cygwin/cygipc-*.README for details Five days later, cygwin-1.5.6 was released with System V shm, sem, msg handling in cygserver. It then became the prefered option. But, cygserver and the documentation was accidentally left out of that release. On the last day of January, cygwin-1.5.7 was released and included the missing files. See /usr/share/doc/Cygwin/cygserver.README for details. Finally, on February 09, cygipc was updated to happily cooexist with the cygserver implementation. </end history lesson> So, get Cygwin 1.5.7 or newer and read its docs listed above. > Thanks, > Claude Barrouil > > --------------- the relevant part of the codee ----------------- > ... > #include <cygwin/shm.h> > ... > ShmId = shmget(ShmKey, ShmSiz, 0666) > ... > SharedData = shmat(ShmId,NULL,0) > ... > --------------- the linkage failure----------------------------- > gcc myprog.c -lm -o myprog.exe > {}/Temp/ccj8s9oV.o(.text+0x67):myprog.c: undefined reference to `_shmget' > {}/Temp/ccj8s9oV.o(.text+0xa3):myprog.c: undefined reference to `_shmat' > collect2: ld returned 1 exit status > ---------------- the end --------------------------------------- > -- Brian Ford Senior Realtime Software Engineer VITAL - Visual Simulation Systems FlightSafety International Phone: 314-551-8460 Fax: 314-551-8444 -- 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/