Bug#939833: default-d-compiler pointing to gdc doesn't understand the "-main" option

[Matthias Klose]

Package: default-d-compiler
Version: 0.6.3
Severity: serious
Tags: sid bullseye
default-d-compiler pointing to gdc doesn't understand the "-main" option, 
causing build failures on at least, armhf and s390x during the link step with 
the gdc command.