Linker option unused - Rebuild of the Debian archive with clang

"Linker option unused" build failure(s)
clang 9.0.1

Versions: 2.9 - 3.0 - 3.1 - 3.2 - 3.3 - 3.4 - 3.4.2 - 3.5.0 - 3.6.0 - 3.8.1 - 3.9.1 - 4.0.1 - 5.0 - 6.0 - 8.0.1 - 9.0.1 - 10.0.0 - 11.0.0 - 12.0.1 - 13.0.0

Package	Version	Supposed error message	Full log
elpa	2016.05.001-6	clang: error: src/mod_precision.f90: 'compiler' input unused in cpp mode [-Werror,-Wunused-command-line-argument]	Log
frozen-bubble	2.212-9	clang: error: -lglib-2.0: 'linker' input unused [-Werror,-Wunused-command-line-argument]	Log
libkiwix	3.1.1-1	clang: error: -Wl,--start-group: 'linker' input unused [-Werror,-Wunused-command-line-argument]	Log

3 errors

Debian Package rebuild