+cf_trim_CFLAGS=`echo "$cf_save_CFLAGS" | \
+ sed -e 's/-[UD]'"_POSIX_C_SOURCE"'\(=[^ ]*\)\?[ ]/ /g' \
+ -e 's/-[UD]'"_POSIX_C_SOURCE"'\(=[^ ]*\)\?$//g'`
+
+cf_trim_CPPFLAGS=`echo "$cf_save_CPPFLAGS" | \
+ sed -e 's/-[UD]'"_POSIX_C_SOURCE"'\(=[^ ]*\)\?[ ]/ /g' \
+ -e 's/-[UD]'"_POSIX_C_SOURCE"'\(=[^ ]*\)\?$//g'`
+
+echo "$as_me:3419: checking if we should define _POSIX_C_SOURCE" >&5
+echo $ECHO_N "checking if we should define _POSIX_C_SOURCE... $ECHO_C" >&6
+if test "${cf_cv_posix_c_source+set}" = set; then
+ echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+
+echo "${as_me:-configure}:3425: testing if the symbol is already defined go no further ..." 1>&5
+
+ cat >conftest.$ac_ext <<_ACEOF
+#line 3428 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main (void)
+{
+
+#ifndef _POSIX_C_SOURCE
+make an error
+#endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:3443: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:3446: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:3449: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:3452: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ cf_cv_posix_c_source=no
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_want_posix_source=no
+ case .$cf_POSIX_C_SOURCE in
+ (.[12]??*)
+ cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
+ ;;
+ (.2)
+ cf_cv_posix_c_source="-D_POSIX_C_SOURCE=$cf_POSIX_C_SOURCE"
+ cf_want_posix_source=yes
+ ;;
+ (.*)
+ cf_want_posix_source=yes
+ ;;
+ esac
+ if test "$cf_want_posix_source" = yes ; then
+ cat >conftest.$ac_ext <<_ACEOF
+#line 3473 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main (void)
+{
+
+#ifdef _POSIX_SOURCE
+make an error
+#endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:3488: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:3491: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:3494: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:3497: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ :
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_cv_posix_c_source="$cf_cv_posix_c_source -D_POSIX_SOURCE"
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ fi
+
+echo "${as_me:-configure}:3508: testing ifdef from value $cf_POSIX_C_SOURCE ..." 1>&5
+
+ CFLAGS="$cf_trim_CFLAGS"
+ CPPFLAGS="$cf_trim_CPPFLAGS $cf_cv_posix_c_source"
+
+echo "${as_me:-configure}:3513: testing if the second compile does not leave our definition intact error ..." 1>&5
+
+ cat >conftest.$ac_ext <<_ACEOF
+#line 3516 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+int
+main (void)
+{
+
+#ifndef _POSIX_C_SOURCE
+make an error
+#endif
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:3531: \"$ac_compile\"") >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ echo "$as_me:3534: \$? = $ac_status" >&5
+ (exit $ac_status); } &&
+ { ac_try='test -s conftest.$ac_objext'
+ { (eval echo "$as_me:3537: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ echo "$as_me:3540: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+ :
+else
+ echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+cf_cv_posix_c_source=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+ CFLAGS="$cf_save_CFLAGS"
+ CPPFLAGS="$cf_save_CPPFLAGS"
+
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+
+fi
+echo "$as_me:3556: result: $cf_cv_posix_c_source" >&5
+echo "${ECHO_T}$cf_cv_posix_c_source" >&6
+
+if test "$cf_cv_posix_c_source" != no ; then
+ CFLAGS="$cf_trim_CFLAGS"
+ CPPFLAGS="$cf_trim_CPPFLAGS"
+
+cf_fix_cppflags=no
+cf_new_cflags=
+cf_new_cppflags=
+cf_new_extra_cppflags=
+
+for cf_add_cflags in $cf_cv_posix_c_source
+do
+case $cf_fix_cppflags in
+(no)
+ case $cf_add_cflags in
+ (-undef|-nostdinc*|-I*|-D*|-U*|-E|-P|-C)
+ case $cf_add_cflags in
+ (-D*)
+ cf_tst_cflags=`echo ${cf_add_cflags} |sed -e 's/^-D[^=]*='\''\"[^"]*//'`
+
+ test "x${cf_add_cflags}" != "x${cf_tst_cflags}" \