bugfix: some old version of "cp" does not support trailing slashes in the destination argument and could break the ./configure script. thanks Weibin Yao for reporting it.

util/configure

@@ -401,14 +401,14 @@ _END_
     }
 
     if (-d 'build') {
-        system("rm -rf build");
+        system("rm -rf build") == 0 or
+            die "failed to remove directory build/.\n";
     }
 
     if (-f 'build') {
-        die "build/ directory already exists\n";
+        die "file \"build\" already exists. please remove it first.\n";
     }
-
-    shell "cp -rp bundle/ build/";
+    shell "cp -rp bundle/ build";
 
     cd 'build';
 

util/ver

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 main_ver=1.0.10
-minor_ver=25
+minor_ver=27
 version=$main_ver.$minor_ver
 echo $version