site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com I have written an implementation of read(int, void*, size_t) that I am trying to use via DYLD_INSERT_LIBRARIES. I have this working fine on 10.4, but not on 10.5. Thanks Stephen, I tried and no dice. I am compiling with … Do I need to add something to that? The thing that's killing you is you are using -mmacosx-version-min=10.4 -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... On Mar 13, 2008, at 5:00 PM, Luke Daley wrote: On 13/03/2008, at 5:19 PM, stephen joseph butler wrote: I have read http://lists.apple.com/archives/Darwin-dev/2007/Nov/ msg00061.html but am still not clear on what I need to do. A follow up to that post mentions including a header. I can't seem to find any detail on this header. Look at the function prototype declaration in <unistd.h> on 10.5. You have to do yours the same way. Macros are defined in <sys/ cdefs.h>. gcc -dynamiclib -o mylib.dylib -fno-common -framework CoreFoundation -mmacosx-version-min=10.4 mysource.c Specifically, I think I need to provide all 3 symbols (_read, _read $UNIX2003 and _read$NOCANCEL$UNIX2003) for this to work. When we compile Libc, we compile it three times in order to get the three versions of the symbols, once each with different definitions. You'll never get the $NOCANCEL version of the symb (the one that avoids the _thread_testcancel() at the start of the system call in the kernel) on a 10.4 deployment target. This email sent to site_archiver@lists.apple.com