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?RCS: $Id: d_mmap.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_mmap.U,v $
?RCS: Revision 3.0.1.1 1993/12/15 08:19:12 ram
?RCS: patch15: created
?RCS:
?MAKE:d_mmap: Trylink cat i_sysmman
?MAKE: -pick add $@ %<
?S:d_mmap:
?S: This variable conditionally defines HAS_MMAP if mmap() is
?S: available to map a file into memory.
?S:.
?C:HAS_MMAP:
?C: This symbol, if defined, indicates that the mmap system call is
?C: available to map a file into memory.
?C:.
?H:#$d_mmap HAS_MMAP /**/
?H:.
?LINT:set d_mmap
: see if mmap exists
$cat >try.c <<EOC
#include <sys/types.h>
#$i_sysmman I_SYS_MMAN
#ifdef I_SYS_MMAN
#include <sys/mman.h>
#endif
int main(void)
{
static off_t offset;
static void *addr;
static size_t len;
static int flags, fd, prot;
void *p;
flags |= PROT_NONE;
flags |= PROT_READ;
flags |= PROT_WRITE;
flags |= PROT_EXEC;
p = mmap(addr, len, prot, flags, fd, offset);
return p ? 0 : 1;
}
EOC
cyn=mmap
set d_mmap
eval $trylink
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