[Users] Listing dependencies

[coderaptor]

I am trying to build a homebrew formula for claws-mail for macOS, and
was wondering if there is an easy way to list its mandatory
dependencies. I can look through configure and try to figure it out,
but if there is an easy way, please let me know.

A partial list that I could put together is gtk+2, glib2, pkg-config,
libcairo, libarchive, libetpan, based on the first successful build on
macOS 10.15.1.

Thanks in advance.

-Amarendra