It's deprecated and gives this warning when running bundler.
NOTE: Gem::Specification#has_rdoc= is deprecated with no replacement. It will be removed on or after 2018-12-01.
Gem::Specification#has_rdoc= called from /mnt/RAID/Projekti/Git/ffi-compiler/ffi-compiler.gemspec:12.
NOTE: Gem::Specification#has_rdoc= is deprecated with no replacement. It will be removed on or after 2018-12-01.
Gem::Specification#has_rdoc= called from /mnt/RAID/Projekti/Git/ffi-compiler/example/example.gemspec:10.
It's deprecated and gives this warning when running bundler.