Can clang-format align a block of #defines for me?

[UPDATE]

The op's pull request finally went through and as of clang version 9.0.0 is live. The functionality is enabled by the AlignConsecutiveMacros: true option.

[ORIGINAL]

Weirdly enough this feature is yet to be implemented in clang; the formatting option for consecutive macros is currently missing.

Many developers are interested and there is a working pull request that has been waiting for approval for years: https://reviews.llvm.org/D28462?id=93341

You can integrate it or just wait whether they add it on the official branch, but at this point I doubt they will.