-#ifndef MAP_VARIABLE
-#define MAP_VARIABLE 0
-#endif
-
-#ifndef MAP_FAILED
-#define MAP_FAILED -1
-#endif
-
-int main (int argc, char *argv[])
-{
- int fd = -1;
- caddr_t p;
-#ifndef MAP_ANONYMOUS
- fd = open ("/dev/zero", O_RDWR);
- if (fd < 0)
- return 1;
-#define MAP_ANONYMOUS 0
-#endif
- if (mmap(0, 1024, PROT_READ | PROT_WRITE,
- MAP_PRIVATE | MAP_VARIABLE | MAP_ANONYMOUS,
- fd, 0) != (void *) MAP_FAILED)
- return 0;
- perror ("conftest: mmap failed");
- return 1;
-}
-EOF
-if { (eval echo configure:9457: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit $?) 2>&5
-then
- have_mmap=yes
-else
- conftest_rc="$?"
- echo "configure: failed program was:" >&5
- cat conftest.$ac_ext >&5
- rm -fr conftest*
- have_mmap=no
-fi
-rm -fr conftest* ;;
-esac
-echo "$ac_t""$have_mmap" 1>&6
-test "$have_mmap" = "yes" && { test "$extra_verbose" = "yes" && cat << \EOF
- Defining HAVE_MMAP
-EOF
-cat >> confdefs.h <<\EOF
-#define HAVE_MMAP 1
-EOF
-}
-
-for ac_hdr in unistd.h
-do
-ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
-echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:9482: checking for $ac_hdr" >&5
-
-cat > conftest.$ac_ext <<EOF
-#line 9485 "configure"
-#include "confdefs.h"
-#include <$ac_hdr>
-EOF
-ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:9490: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
-ac_err=`grep -v '^ *+' conftest.out`
-if test -z "$ac_err"; then
- rm -rf conftest*
- eval "ac_cv_header_$ac_safe=yes"
-else
- echo "$ac_err" >&5
- echo "configure: failed program was:" >&5
- cat conftest.$ac_ext >&5
- rm -rf conftest*
- eval "ac_cv_header_$ac_safe=no"
-fi
-rm -f conftest*
-if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
- echo "$ac_t""yes" 1>&6
- ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
- { test "$extra_verbose" = "yes" && cat << EOF
- Defining $ac_tr_hdr
-EOF
-cat >> confdefs.h <<EOF
-#define $ac_tr_hdr 1
-EOF
-}
-
-else
- echo "$ac_t""no" 1>&6
-fi
-done
-
-for ac_func in getpagesize
-do
-echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:9522: checking for $ac_func" >&5
-
-cat > conftest.$ac_ext <<EOF
-#line 9525 "configure"
-#include "confdefs.h"
-/* System header to define __stub macros and hopefully few prototypes,
- which can conflict with char $ac_func(); below. */
-#include <assert.h>
-/* Override any gcc2 internal prototype to avoid an error. */
-/* We use char because int might match the return type of a gcc2
- builtin and then its argument prototype would still apply. */
-char $ac_func();
-
-int main() {
-
-/* The GNU C library defines this for functions which it implements
- to always fail with ENOSYS. Some functions are actually named
- something starting with __ and the normal name is an alias. */
-#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
-choke me
-#else
-$ac_func();
-#endif
-
-; return 0; }
-EOF
-if { (eval echo configure:9548: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
- rm -rf conftest*
- eval "ac_cv_func_$ac_func=yes"
-else
- echo "configure: failed program was:" >&5
- cat conftest.$ac_ext >&5
- rm -rf conftest*
- eval "ac_cv_func_$ac_func=no"
-fi
-rm -f conftest*
-
-if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
- echo "$ac_t""yes" 1>&6
- ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
- { test "$extra_verbose" = "yes" && cat << EOF
- Defining $ac_tr_func
-EOF
-cat >> confdefs.h <<EOF
-#define $ac_tr_func 1
-EOF
-}
-
-else
- echo "$ac_t""no" 1>&6
-fi
-done
-
-echo $ac_n "checking for working mmap""... $ac_c" 1>&6
-echo "configure:9576: checking for working mmap" >&5
-
-cat > conftest.$ac_ext <<EOF
-#line 9579 "configure"
-#include "confdefs.h"
-
-/* Thanks to Mike Haertel and Jim Avera for this test.
- Here is a matrix of mmap possibilities:
- mmap private not fixed
- mmap private fixed at somewhere currently unmapped
- mmap private fixed at somewhere already mapped
- mmap shared not fixed
- mmap shared fixed at somewhere currently unmapped
- mmap shared fixed at somewhere already mapped
- For private mappings, we should verify that changes cannot be read()
- back from the file, nor mmap's back from the file at a different
- address. (There have been systems where private was not correctly
- implemented like the infamous i386 svr4.0, and systems where the
- VM page cache was not coherent with the filesystem buffer cache
- like early versions of FreeBSD and possibly contemporary NetBSD.)
- For shared mappings, we should conversely verify that changes get
- propogated back to all the places they're supposed to be.
-
- Grep wants private fixed already mapped.
- The main things grep needs to know about mmap are:
- * does it exist and is it safe to write into the mmap'd area
- * how to use it (BSD variants) */
-#include <sys/types.h>
-#include <fcntl.h>
-#include <sys/mman.h>
-
-/* This mess was copied from the GNU getpagesize.h. */
-#ifndef HAVE_GETPAGESIZE
-# ifdef HAVE_UNISTD_H
-# include <unistd.h>
-# endif
-
-/* Assume that all systems that can run configure have sys/param.h. */
-# ifndef HAVE_SYS_PARAM_H
-# define HAVE_SYS_PARAM_H 1
-# endif
-
-# ifdef _SC_PAGESIZE
-# define getpagesize() sysconf(_SC_PAGESIZE)
-# else /* no _SC_PAGESIZE */
-# ifdef HAVE_SYS_PARAM_H
-# include <sys/param.h>
-# ifdef EXEC_PAGESIZE
-# define getpagesize() EXEC_PAGESIZE
-# else /* no EXEC_PAGESIZE */
-# ifdef NBPG
-# define getpagesize() NBPG * CLSIZE
-# ifndef CLSIZE
-# define CLSIZE 1
-# endif /* no CLSIZE */
-# else /* no NBPG */
-# ifdef NBPC
-# define getpagesize() NBPC
-# else /* no NBPC */
-# ifdef PAGESIZE
-# define getpagesize() PAGESIZE
-# endif /* PAGESIZE */
-# endif /* no NBPC */
-# endif /* no NBPG */
-# endif /* no EXEC_PAGESIZE */
-# else /* no HAVE_SYS_PARAM_H */
-# define getpagesize() 8192 /* punt totally */
-# endif /* no HAVE_SYS_PARAM_H */
-# endif /* no _SC_PAGESIZE */
-
-#endif /* no HAVE_GETPAGESIZE */