+ fi
+ echo "$ac_t""$bfd_cv_have_sys_procfs_type_prgregset_t" 1>&6
+
+ echo $ac_n "checking for prfpregset_t in sys/procfs.h""... $ac_c" 1>&6
+echo "configure:4471: checking for prfpregset_t in sys/procfs.h" >&5
+ if eval "test \"`echo '$''{'bfd_cv_have_sys_procfs_type_prfpregset_t'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4476 "configure"
+#include "confdefs.h"
+#include <sys/procfs.h>
+int main() {
+prfpregset_t avar
+; return 0; }
+EOF
+if { (eval echo configure:4483: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_prfpregset_t=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_prfpregset_t=no
+
+fi
+rm -f conftest*
+fi
+
+ if test $bfd_cv_have_sys_procfs_type_prfpregset_t = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_PRFPREGSET_T 1
+EOF
+
+ fi
+ echo "$ac_t""$bfd_cv_have_sys_procfs_type_prfpregset_t" 1>&6
+
+ echo $ac_n "checking for lwpid_t in sys/procfs.h""... $ac_c" 1>&6
+echo "configure:4505: checking for lwpid_t in sys/procfs.h" >&5
+ if eval "test \"`echo '$''{'bfd_cv_have_sys_procfs_type_lwpid_t'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4510 "configure"
+#include "confdefs.h"
+#include <sys/procfs.h>
+int main() {
+lwpid_t avar
+; return 0; }
+EOF
+if { (eval echo configure:4517: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_lwpid_t=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_lwpid_t=no
+
+fi
+rm -f conftest*
+fi
+
+ if test $bfd_cv_have_sys_procfs_type_lwpid_t = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_LWPID_T 1
+EOF
+
+ fi
+ echo "$ac_t""$bfd_cv_have_sys_procfs_type_lwpid_t" 1>&6
+
+ echo $ac_n "checking for psaddr_t in sys/procfs.h""... $ac_c" 1>&6
+echo "configure:4539: checking for psaddr_t in sys/procfs.h" >&5
+ if eval "test \"`echo '$''{'bfd_cv_have_sys_procfs_type_psaddr_t'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4544 "configure"
+#include "confdefs.h"
+#include <sys/procfs.h>
+int main() {
+psaddr_t avar
+; return 0; }
+EOF
+if { (eval echo configure:4551: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_psaddr_t=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ bfd_cv_have_sys_procfs_type_psaddr_t=no
+
+fi
+rm -f conftest*
+fi
+
+ if test $bfd_cv_have_sys_procfs_type_psaddr_t = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_PSADDR_T 1
+EOF
+
+ fi
+ echo "$ac_t""$bfd_cv_have_sys_procfs_type_psaddr_t" 1>&6
+
+
+
+
+ if test $bfd_cv_have_sys_procfs_type_prfpregset_t = yes; then
+ echo $ac_n "checking whether prfpregset_t type is broken""... $ac_c" 1>&6
+echo "configure:4577: checking whether prfpregset_t type is broken" >&5
+ if eval "test \"`echo '$''{'gdb_cv_prfpregset_t_broken'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test "$cross_compiling" = yes; then
+ gdb_cv_prfpregset_t_broken=yes
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4585 "configure"
+#include "confdefs.h"
+#include <sys/procfs.h>
+ int main ()
+ {
+ if (sizeof (prfpregset_t) == sizeof (void *))
+ return 1;
+ return 0;
+ }
+EOF
+if { (eval echo configure:4595: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+then
+ gdb_cv_prfpregset_t_broken=no
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ gdb_cv_prfpregset_t_broken=yes
+fi
+rm -fr conftest*
+fi
+
+fi
+
+ echo "$ac_t""$gdb_cv_prfpregset_t_broken" 1>&6
+ if test $gdb_cv_prfpregset_t_broken = yes; then
+ cat >> confdefs.h <<\EOF
+#define PRFPREGSET_T_BROKEN 1
+EOF
+
+ fi
+ fi
+
+
+ echo $ac_n "checking for PIOCSET ioctl entry in sys/procfs.h""... $ac_c" 1>&6
+echo "configure:4620: checking for PIOCSET ioctl entry in sys/procfs.h" >&5
+ if eval "test \"`echo '$''{'gdb_cv_have_procfs_piocset'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4625 "configure"
+#include "confdefs.h"
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/procfs.h>
+
+int main() {
+
+ int dummy;;
+ dummy = ioctl(0, PIOCSET, &dummy);
+
+; return 0; }
+EOF
+if { (eval echo configure:4638: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ gdb_cv_have_procfs_piocset=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ gdb_cv_have_procfs_piocset=no
+fi
+rm -f conftest*
+fi
+
+ echo "$ac_t""$gdb_cv_have_procfs_piocset" 1>&6
+ if test $gdb_cv_have_procfs_piocset = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_PROCFS_PIOCSET 1
+EOF
+
+ fi
+fi
+
+echo $ac_n "checking for main in -lm""... $ac_c" 1>&6
+echo "configure:4660: checking for main in -lm" >&5
+ac_lib_var=`echo m'_'main | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lm $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 4668 "configure"
+#include "confdefs.h"
+
+int main() {
+main()
+; return 0; }
+EOF
+if { (eval echo configure:4675: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ ac_tr_lib=HAVE_LIB`echo m | sed -e 's/[^a-zA-Z0-9_]/_/g' \
+ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
+ cat >> confdefs.h <<EOF
+#define $ac_tr_lib 1
+EOF
+
+ LIBS="-lm $LIBS"
+
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+
+echo $ac_n "checking for wctype in -lc""... $ac_c" 1>&6
+echo "configure:4704: checking for wctype in -lc" >&5
+ac_lib_var=`echo c'_'wctype | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lc $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 4712 "configure"
+#include "confdefs.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 wctype();
+
+int main() {
+wctype()
+; return 0; }
+EOF
+if { (eval echo configure:4723: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ :
+else
+ echo "$ac_t""no" 1>&6
+echo $ac_n "checking for wctype in -lw""... $ac_c" 1>&6
+echo "configure:4742: checking for wctype in -lw" >&5
+ac_lib_var=`echo w'_'wctype | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lw $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 4750 "configure"
+#include "confdefs.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 wctype();
+
+int main() {
+wctype()
+; return 0; }
+EOF
+if { (eval echo configure:4761: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ ac_tr_lib=HAVE_LIB`echo w | sed -e 's/^a-zA-Z0-9_/_/g' \
+ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'`
+ cat >> confdefs.h <<EOF
+#define $ac_tr_lib 1
+EOF
+
+ LIBS="-lw $LIBS"
+
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+fi
+
+
+
+echo $ac_n "checking for long long support in compiler""... $ac_c" 1>&6
+echo "configure:4793: checking for long long support in compiler" >&5
+if eval "test \"`echo '$''{'gdb_cv_c_long_long'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4798 "configure"
+#include "confdefs.h"
+
+int main() {
+
+ extern long long foo;
+ switch (foo & 2) { case 0: return 1; }
+
+; return 0; }
+EOF
+if { (eval echo configure:4808: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ gdb_cv_c_long_long=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ gdb_cv_c_long_long=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$gdb_cv_c_long_long" 1>&6
+if test $gdb_cv_c_long_long = yes; then
+ cat >> confdefs.h <<\EOF
+#define CC_HAS_LONG_LONG 1
+EOF
+
+fi
+
+
+echo $ac_n "checking for long long support in printf""... $ac_c" 1>&6
+echo "configure:4830: checking for long long support in printf" >&5
+if eval "test \"`echo '$''{'gdb_cv_printf_has_long_long'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test "$cross_compiling" = yes; then
+ gdb_cv_printf_has_long_long=no
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4838 "configure"
+#include "confdefs.h"
+
+int main () {
+ char buf[32];
+ long long l = 0;
+ l = (l << 16) + 0x0123;
+ l = (l << 16) + 0x4567;
+ l = (l << 16) + 0x89ab;
+ l = (l << 16) + 0xcdef;
+ sprintf (buf, "0x%016llx", l);
+ return (strcmp ("0x0123456789abcdef", buf));
+}
+EOF
+if { (eval echo configure:4852: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+then
+ gdb_cv_printf_has_long_long=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ gdb_cv_printf_has_long_long=no
+fi
+rm -fr conftest*
+fi
+
+fi
+
+if test $gdb_cv_printf_has_long_long = yes; then
+ cat >> confdefs.h <<\EOF
+#define PRINTF_HAS_LONG_LONG 1
+EOF
+
+fi
+echo "$ac_t""$gdb_cv_printf_has_long_long" 1>&6
+
+
+echo $ac_n "checking for long double support in compiler""... $ac_c" 1>&6
+echo "configure:4876: checking for long double support in compiler" >&5
+if eval "test \"`echo '$''{'ac_cv_c_long_double'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4881 "configure"
+#include "confdefs.h"
+
+int main() {
+long double foo;
+; return 0; }
+EOF
+if { (eval echo configure:4888: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ ac_cv_c_long_double=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ ac_cv_c_long_double=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$ac_cv_c_long_double" 1>&6
+if test $ac_cv_c_long_double = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_LONG_DOUBLE 1
+EOF
+
+fi
+
+
+echo $ac_n "checking for long double support in printf""... $ac_c" 1>&6
+echo "configure:4910: checking for long double support in printf" >&5
+if eval "test \"`echo '$''{'gdb_cv_printf_has_long_double'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test "$cross_compiling" = yes; then
+ gdb_cv_printf_has_long_double=no
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4918 "configure"
+#include "confdefs.h"
+
+int main () {
+ char buf[16];
+ long double f = 3.141592653;
+ sprintf (buf, "%Lg", f);
+ return (strncmp ("3.14159", buf, 7));
+}
+EOF
+if { (eval echo configure:4928: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+then
+ gdb_cv_printf_has_long_double=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ gdb_cv_printf_has_long_double=no
+fi
+rm -fr conftest*
+fi
+
+fi
+
+if test $gdb_cv_printf_has_long_double = yes; then
+ cat >> confdefs.h <<\EOF
+#define PRINTF_HAS_LONG_DOUBLE 1
+EOF
+
+fi
+echo "$ac_t""$gdb_cv_printf_has_long_double" 1>&6
+
+
+echo $ac_n "checking for long double support in scanf""... $ac_c" 1>&6
+echo "configure:4952: checking for long double support in scanf" >&5
+if eval "test \"`echo '$''{'gdb_cv_scanf_has_long_double'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test "$cross_compiling" = yes; then
+ gdb_cv_scanf_has_long_double=no
+else
+ cat > conftest.$ac_ext <<EOF
+#line 4960 "configure"
+#include "confdefs.h"
+
+int main () {
+ char *buf = "3.141592653";
+ long double f = 0;
+ sscanf (buf, "%Lg", &f);
+ return !(f > 3.14159 && f < 3.14160);
+}
+EOF
+if { (eval echo configure:4970: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+then
+ gdb_cv_scanf_has_long_double=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ gdb_cv_scanf_has_long_double=no
+fi
+rm -fr conftest*
+fi
+
+fi
+
+if test $gdb_cv_scanf_has_long_double = yes; then
+ cat >> confdefs.h <<\EOF
+#define SCANF_HAS_LONG_DOUBLE 1
+EOF
+
+fi
+echo "$ac_t""$gdb_cv_scanf_has_long_double" 1>&6
+
+for ac_hdr in unistd.h
+do
+ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
+echo "configure:4996: checking for $ac_hdr" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 5001 "configure"
+#include "confdefs.h"
+#include <$ac_hdr>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:5006: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
+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_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
+ 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:5035: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 5040 "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:5063: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; 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_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+ 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""... $ac_c" 1>&6
+echo "configure:5088: checking for working mmap" >&5
+if eval "test \"`echo '$''{'ac_cv_func_mmap_fixed_mapped'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test "$cross_compiling" = yes; then
+ ac_cv_func_mmap_fixed_mapped=no
+else
+ cat > conftest.$ac_ext <<EOF
+#line 5096 "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 */