Ignore unknown warnings only in clang
Ignore unknown warnings only in clang

That flag is not implemented in gcc.

saisai/byebug,guilherme/byebug,miamiruby/byebug,miamiruby/byebug,icebreaker/byebug,k0kubun/byebug,yui-knk/byebug,ozydingo/byebug,saisai/byebug,k0kubun/byebug,scalp42/byebug,guilherme/byebug,icebreaker/byebug,os97673/byebug,scalp42/byebug,deivid-rodriguez/byebug,guilherme/byebug,deivid-rodriguez/byebug,deivid-rodriguez/byebug,yui-knk/byebug,ozydingo/byebug,k0kubun/byebug,yui-knk/byebug,os97673/byebug,webdev1001/byebug,webdev1001/byebug