klibc - Apr 2006 - ia64 build failure - no fork or ppoll syscalls in 2.6.16

klibc fails to build on ia64 because it has neither fork nor the ppoll
syscalls.  This patch marks the former in SYSCALLS.def, and puts a guard
wrapper around the ppoll definition in ppoll.c

Should these calls return ENOSYS rather than simply not existing on some
systems?  If yes, please apply this and I'll follow up with a patch
shortly that does ENOSYS for this and pselect at least.

Signed-off-by: Jeff Bailey <jbailey@ubuntu.com>

--- klibc-1.3.7.orig/klibc/ppoll.c
+++ klibc-1.3.7/klibc/ppoll.c
@@ -3,6 +3,9 @@
  */

 #include <sys/poll.h>
+#include <sys/syscall.h>
+
+#if defined(__NR_ppoll)

 __extern int __ppoll(struct pollfd *, nfds_t, struct timespec *,
                     const sigset_t *, size_t);
@@ -12,3 +15,5 @@
 {
   return __ppoll(ufds, nfds, timeout, sigmask, sizeof *sigmask);
 }
+
+#endif
--- klibc-1.3.7.orig/klibc/SYSCALLS.def
+++ klibc-1.3.7/klibc/SYSCALLS.def
@@ -21,7 +21,7 @@
 <?!ia64> pid_t clone::__clone(unsigned long, void *)
 <?ia64> pid_t clone::__clone2(unsigned long, void *, void *)
 # if ! _KLIBC_NO_MMU
-<!sparc> pid_t fork()
+<!sparc,ia64> pid_t fork()
 <sparc> pid_t fork@forkish()
 #endif
 #if _KLIBC_REAL_VFORK


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Jeff Bailey wrote:
> klibc fails to build on ia64 because it has neither fork nor the ppoll
> syscalls.  This patch marks the former in SYSCALLS.def, and puts a guard
> wrapper around the ppoll definition in ppoll.c
> 
> Should these calls return ENOSYS rather than simply not existing on some
> systems?  If yes, please apply this and I'll follow up with a patch
> shortly that does ENOSYS for this and pselect at least.
fork is a miss on my part, of course; IA64 has a way to fork, it's just 
weird.

Why doesn't IA64 have pselect/ppoll?  (And no, having them exist but 
returning ENOSYS is the absolutely worst thing you could do.)

	-hpa