When comparing Tup vs Buck, the Slant community recommends Tup for most people. In the question“What are the best open-source build systems for C/C++?” Tup is ranked 5th while Buck is ranked 9th. The most important reason people chose Tup is:
It is very fast.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Speed
It is very fast.
Pro Tidy
It will automatically clean-up old files.
Pro General
Not bound to C/C++.
Pro Lua
Tup supports writing build definitions using Lua or Tupfiles.
Pro Cross platform
Supports Linux, OSX, and Windows.
Pro Can be integrated with IntelliJ and Xcode IDEs
Pro Fast parallel builds
Buck runs artifact builds in parallel to increase the speed in which build jobs are run and take full advantage of all the cores available.
Cons
Con Variants not working on Windows
The solution for having different build configuration (think Release/Debug) is broken on Windows.
Con Cannot incrementally modify or delete files
Cannot incrementally modify files (e.g. LaTeX PDF, VISing and LIGHTing Quake maps, which takes the same BSP file as input and output), and will not delete files (e.g. rm build/*.o).