Hi all, I have a few questions about the libc wrapper layer on FreeBSD, and its implementation of xf86shmat() and friends.
On FreeBSD, XFree86's libc wrapper is: xc/programs/Xserver/hw/xfree86/os-support/bsd/libc_wrapper.c which is a symlink to: xc/programs/Xserver/hw/xfree86/os-support/shared/libc_wrapper.c There are two implementations of xf86shmget(), xf86shmat(), xf86shmctl(), and xf86shmdt() in libc_wrapper.c: - an implementation that just calls into the C library via shmget(), shmat(), shmdt() and shmctl(); this implementation is protected by "#ifdef HAVE_SYSV_IPC" - an implementation that is used when HAVE_SYSV_IPC is not defined; in this case, the four functions each just return -1. It seems that HAVE_SYSV_IPC is not defined by default. Is there a more correct way to enable it, rather than just adding "-DHAVE_SYSV_IPC" to the DefaultCCOptions in my host.def? When I do define HAVE_SYSV_IPC, then I hit a problem with the implementation of xf86shmat(): char * xf86shmat(int id, char *addr, int xf86shmflg) { int shmflg = 0; if (xf86shmflg & XF86SHM_RDONLY) shmflg |= SHM_RDONLY; if (xf86shmflg & XF86SHM_RND) shmflg |= SHM_RND; if (xf86shmflg & XF86SHM_REMAP) shmflg |= SHM_REMAP; return shmat(id,addr,shmflg); } complaining that SHM_REMAP isn't defined. Grepping in /usr/include/, I couldn't find SHM_REMAP. Does anyone know if this doesn't exist on FreeBSD? I'm using FreeBSD-4.5 (haven't tried any of this on -CURRENT, yet). I'm a little confused how XFree86 could use shared memory with the current CVS code. Does anyone know anything about this? Thanks, - Andy Ritger _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert