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+?RCS: $Id: d_msync.U 167 2013-05-08 17:58:00Z rmanfredi $
+?RCS:
+?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
+?RCS:
+?RCS: You may redistribute only under the terms of the Artistic License,
+?RCS: as specified in the README file that comes with the distribution.
+?RCS: You may reuse parts of this distribution only within the terms of
+?RCS: that same Artistic License; a copy of which may be found at the root
+?RCS: of the source tree for dist 4.0.
+?RCS:
+?RCS: $Log: d_msync.U,v $
+?RCS: Revision 3.0.1.1 1993/12/15 08:19:17 ram
+?RCS: patch15: created
+?RCS:
+?MAKE:d_msync: Trylink cat i_sysmman
+?MAKE: -pick add $@ %<
+?S:d_msync:
+?S: This variable conditionally defines HAS_MSYNC if msync() is
+?S: available to synchronize a mapped file.
+?S:.
+?C:HAS_MSYNC:
+?C: This symbol, if defined, indicates that the msync system call is
+?C: available to synchronize a mapped file.
+?C:.
+?H:#$d_msync HAS_MSYNC /**/
+?H:.
+?LINT:set d_msync
+: see if msync exists
+$cat >try.c <<EOC
+#$i_sysmman I_SYS_MMAN
+#ifdef I_SYS_MMAN
+#include <sys/mman.h>
+#endif
+int main(void)
+{
+ static int ret, flags;
+ static void *addr;
+ static size_t len;
+ flags |= MS_ASYNC;
+ flags |= MS_SYNC;
+ flags |= MS_INVALIDATE;
+ ret |= msync(addr, len, flags);
+ return ret ? 0 : 1;
+}
+EOC
+cyn=msync
+set d_msync
+eval $trylink
+