Hi, Emacs team.

I got the build error of Emacs v26.3.50 on macOS v10.15.4 with Xcode 11.4.1.
Using the attached diff.patch, you would get success build Emacs v26.3.50.

The reproduction procedure, error log and workarounds are summarized below.
https://github.com/hiroakit/emacs-on-apple/issues/1

Would you be able to check it?

Best regards,
Hiroaki ENDOH