问题
I was following Telegram's compile process at here and in the last step when compiling the app itself it gives me this error, to be brief the error's final lines are:
CMakeFiles/MetaLang.dir/build.make:189: recipe for target 'MetaLang' failed
make[2]: *** [MetaLang] Error 1
CMakeFiles/Makefile2:721: recipe for target 'CMakeFiles/MetaLang.dir/all' failed
make[1]: *** [CMakeFiles/MetaLang.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
P.S. my OS is Ubuntu 16.04 and the folder in which the process is going on is ~/Documents/Telegram/
来源：https://stackoverflow.com/questions/40286871/telegram-compilation-process-recipe-for-target-cmakefiles-metalang-dir-all-fa