See section 20 in <u>[the CLI doc](https://sqlite.org/cli.html)</u>, where you will see how to build the shell. The makefiles mentioned there are included in the source amalgamations whose link text resembles 'sqlite-autoconf-\#\#\#\#\#\#\#.tar.gz'. To get a 64-bit executable with GNU's gcc, you need a '-m64' option. To get a 64-bit executable with Microsoft's CL.exe, you need to have run the batch file (provided with the compiler installation) which selects that target and associated system libraries.