"Cannot use -o use multiple output" build failure(s) — clang 11.0.0

This command is failing under clang (with a wrong error message) while it is working with gcc.
clang main.c plop3.h -o main
PackageVersionSupposed error messageFull log Bug report
dascrubber 1.1-2: error: cannot specify -o when generating multiple output files Log
dazzdb 1.0+git20200727.d22ae58-1: error: cannot specify -o when generating multiple output files Log
genometester 4.0+git20200511.91cecb5+dfsg-1clang: error: cannot specify -o when generating multiple output files Log
langford 0.0.20130228-6clang: error: cannot specify -o when generating multiple output files Log
libssw 1.1-11clang: error: cannot specify -o when generating multiple output files Log
liferea 1.13.3-1clang: error: cannot specify -o when generating multiple output files Log 746610
princeprocessor 0.22-1clang: error: cannot specify -o when generating multiple output files Log
tennix 1.1-3.2clang: error: cannot specify -o when generating multiple output files Log

8 errors