Missing some information about the differences between v2 and v3 about argtable3 HOT 1 OPEN

Hi @claudix ,

From users' point of view, the major differences are:

• Change to 3-Clause BSD license.
• Provide amalgamation distribution.
• Add APIs to support subcommands.
• Add APIs to manage dynamic strings and make it easier to write Tcl commands.

I believe you can still use most of the v2 APIs in v3. However, v3 doesn't promise to be compatible with v2, so I can have more freedom to shape v3 APIs.

v3 is still based on getopt, so you're right, maybe it is not thread-safe. However, I never use Argtable3 in multi-thread scenarios, so I never think about making v3 a thread-safe library. If there's such a use case, maybe we can dedicate a thread to Argtable3, and all the other threads can call the service exposed by the Argtable3 thread to parse commands.

from argtable3.