Update configure

Author: yvoinov

Diff for: configure

@@ -5132,48 +5132,7 @@ fi
   MAINT=$MAINTAINER_MODE_TRUE
 
 
-# Check whether --enable-silent-rules was given.
-if test ${enable_silent_rules+y}
-then :
-  enableval=$enable_silent_rules;
-fi
-
-case $enable_silent_rules in # (((
-  yes) AM_DEFAULT_VERBOSITY=0;;
-   no) AM_DEFAULT_VERBOSITY=1;;
-    *) AM_DEFAULT_VERBOSITY=0;;
-esac
-am_make=${MAKE-make}
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
-printf %s "checking whether $am_make supports nested variables... " >&6; }
-if test ${am_cv_make_support_nested_variables+y}
-then :
-  printf %s "(cached) " >&6
-else case e in #(
-  e) if printf "%s\n" 'TRUE=$(BAR$(V))
-BAR0=false
-BAR1=true
-V=1
-am__doit:
-	@$(TRUE)
-.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
-  am_cv_make_support_nested_variables=yes
-else
-  am_cv_make_support_nested_variables=no
-fi ;;
-esac
-fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
-printf "%s\n" "$am_cv_make_support_nested_variables" >&6; }
-if test $am_cv_make_support_nested_variables = yes; then
-    AM_V='$(V)'
-  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
-else
-  AM_V=$AM_DEFAULT_VERBOSITY
-  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
-fi
-AM_BACKSLASH='\'
-
+#AM_SILENT_RULES([yes])
 
 # ===========================================================================
 #  https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
@@ -18748,6 +18707,20 @@ esac
 fi
 
 
+       for ac_header in sys/mman.h
+do :
+  ac_fn_cxx_check_header_compile "$LINENO" "sys/mman.h" "ac_cv_header_sys_mman_h" "$ac_includes_default"
+if test "x$ac_cv_header_sys_mman_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_SYS_MMAN_H 1" >>confdefs.h
+
+else case e in #(
+  e) as_fn_error $? "Require sys/mman.h to build" "$LINENO" 5 ;;
+esac
+fi
+
+done
+
 
 
 cat >confcache <<\_ACEOF