I complained a few months ago about
makedepend not picking up dependencies, and gave a recipe for avoiding makedepend.
I'm stuck with it for a project, and a couple of times I've gotten a makedepend failure, with only this useless warning:
makedepend: error: failed to read [some directory name]
The problem ended up being an
#includesomewhere, where the opening double-quote (
") was missing. One time I accidentally had a single-quote at the beginning, closed with a double-quote; the other time a co-worker left off the opening quote, but did have the closing quote.
No help from makedepend on which file has the faulty include: it just gives up on the whole directory. Thanks, makedepend. Notice that if you leave off both quotes, or have both as single-quotes, makedepend is kind enough to give you a meaningful message. Or, if you open with a double-quote, and forget the closing quote, it exits without an error! Though I'm not sure if it gets the dependencies right in that case.
Do yourself a favor, use gcc's dependency-generating scheme, and never use makedepend again.