--- configure.orig	2017-01-05 01:07:49.029440284 +0100
+++ configure	2017-01-08 19:42:47.704475698 +0100
@@ -7,7 +7,7 @@
 my $version     = "1.1.1";
 my $cxx         = "g++";
 my @cxxflags    = ("-O6");
-my @ldflags     = ("-lpthread");
+my @ldflags     = ("-ldl", "-lpthread");
 my @libs        = ();
 my $configh     = "config.h";
 my $configmake  = "config.make";
@@ -16,6 +16,7 @@
 my $manprefix   = '';
 #my $dgt         = 1;
 
+
 # ------------
 
 sub usage;
@@ -640,7 +641,20 @@
  #   print CONFIGH "#define WITH_DGT_BOARD 1\n";
  # }
 #}
+ #
 
+@envcxxflags = split(/ /, $ENV{CXXFLAGS});
+for (@envcxxflags) {
+	if ($_ ne "") {
+		push @cxxflags, "$_";
+}
+}
+@envldflags = split(/ /, $ENV{LDFLAGS});
+for (@envldflags) {
+	if ($_ ne "") {
+		push @ldflags, "$_";
+}
+}
 
 # end
 
@@ -649,7 +663,7 @@
 }
 
 if ($manprefix eq '') {
-  $manprefix = "$prefix/man";
+  $manprefix = "$prefix/share/man";
 }
 
 print CONFIGH "#define DATADIR \"$dataprefix\"\n";
@@ -666,7 +680,6 @@
 close CONFIGH;
 print "wrote $configh\n";
 
-print CONFIGMAKE "CXX       = $cxx\n";
 print CONFIGMAKE "CXXFLAGS  = @cxxflags\n";
 print CONFIGMAKE "LDFLAGS   = @ldflags\n";