Uncaught exception of type CLI::CallForHelp

[samuelpmish]

Hi, I've used CLI11 in a handful of projects and was recently surprised to see this error message when passing --help to a CLI app:

libc++abi: terminating due to uncaught exception of type CLI::CallForHelp: This should be caught in your main function, see examples

After some investigating, it seems that the cause may be related to a previous issue I had when developing on my mac, where the linker would emit error messages to the tune of ld: warning: could not create compact unwind for .... To suppress these messages, I absent-mindedly added a flag to my CMake target

target_link_options(my_target PUBLIC -Wl,-no_compact_unwind)

Now, it seems that the uncaught exception error message appears when this no_compact_unwind flag is set. Here's a minimal reproducer for a CLI example project with and without that flag:

CLI11_example_project.zip

The same results occur (i.e. no_compact_unwind -> uncaught exception of type CLI::CallForHelp) when compiling with clang 17.0, apple-clang 15.0, and gcc 13.2 on a mac running sonoma.

Has anybody seen this before and know a potential workaround?