Remove "install-includes: HsDirectoryConfig.h"

[mpickering]

This header file is not supposed to be installed for users, users are not supposed to use it. The file exists to be used interally (and this is explained by the "include-dirs" field in the cabal file.

It seems likely that this removal was overlooked in c87be99

[mpickering]

This is likely to have been broken for at least 6 years anyway due to this Cabal bug - haskell/cabal#10238

[juhp]

Ah, is this the cause of:

$ ghc-pkg check
Warning: include-dirs: /usr/lib64/ghc-9.6.6/lib/../lib/x86_64-linux-ghc-9.6.6/directory-1.3.8.5/include doesn't exist or isn't a directory

or is that unrelated? (also for 9.8)

I was wondering if include-dirs: . should also be removed from directory.cabal?

[mpickering]

Yes it is the cause of that warning @juhp, and no the include-dirs still needs to be there as the header needs to be found when building directory itself.