This is patch for GSoC project, bash-completion for clang.
To use this on bash, please run source clang/utils/bash-autocomplete.sh.
bash-autocomplete.sh is code for bash-completion.
In this patch, Options.td was mainly changed in order to add value class in Options.inc. It adds initial support for auto-completing flag values in bash. The general idea is to make Options.td aware of all possible values for all flags, and then generate a lookup data structure in the clang driver.
From the bash side we call clang with --autocomplete like this clang --autocomplete=-stdlib=,l and then the clang driver returns all possible values which starts with "l" in -stdlib's Values class.