aldoWan [1] filed a deletion request for wdt [2]: in last folly release https://github.com/facebook/folly/releases/tag/v2017.10.16.00 CheckSum.cpp has been moved to folly/hash/Checksum.cpp. This doesn't match with wdt v1.27.1612021 release in wich CmakeList.txt is looking for Checksum.cpp in folder: `"${FOLLY_SOURCE_DIR}/folly/Checksum.cpp"` instead of `"${FOLLY_SOURCE_DIR}/folly/hash/Checksum.cpp"` and the build failed with error ``` CMake Error at CMakeLists.txt:207 (add_library): Cannot find source file: /tmp/yaourt-tmp-aldo/aur-wdt/src/folly/folly/Checksum.cpp Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp .hxx .in .txx CMake Error: CMake can not determine linker language for target: folly4wdt CMake Error: Cannot determine link language for target "folly4wdt". ``` We have to replace `git checkout "$(git describe --abbrev=0 --always)"` by `git checkout "v2017.10.09.00"`. However the wdt aur build fail a bit after with this changes in my laptop. [1] https://aur.archlinux.org/account/aldoWan/ [2] https://aur.archlinux.org/pkgbase/wdt/