My build was broken in cli_ure with following errors.

...
Microsoft (R) Visual C# .NET Compiler version 7.10.6001.4
for Microsoft (R) .NET Framework version 1.1.4322
Copyright (C) Microsoft Corporation 2001-2002. All rights reserved.

fatal error CS2007: Unrecognized command-line option:
        '-keyfile:..\..\wntmsci11.pro\bin\cliuno.snk'
dmake:  Error code 1, while making '../../wntmsci11.pro/bin/cli_basetypes.dll'
...

(As you can see from the error message) The C# compiler for .NET 1.1 was used,
but the version has no idea about 'keyfile' option which was introduced from
.NET 2.0. After reconfiguring with '--with-csc-path' to .NET Framework 2.0 SDK,
cli_ure could be built successfully.

To fix this issue, the configure script needs to enforce C# compiler for .NET
2.0 or above, and to add .NET 2.0 SDK path to PATH variable (instead of .NET 1.1
SDK path) when no '--with-csc-path' specified.