+ac_safe=`echo "libio.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for libio.h""... $ac_c" 1>&6
+echo "configure:2266: checking for libio.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 2271 "configure"
+#include "confdefs.h"
+#include <libio.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:2276: \"$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
+
+ cat > conftest.$ac_ext <<EOF
+#line 2294 "configure"
+#include "confdefs.h"
+#include <libio.h>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "_IO_write_ptr" >/dev/null 2>&1; then
+ rm -rf conftest*
+
+ cat >> confdefs.h <<\EOF
+#define LINUX_STDIO 1
+EOF
+
+fi
+rm -f conftest*
+
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+