[swift-dev] hmap files

Daniel Dunbar daniel_dunbar at apple.com
Tue Apr 26 13:52:51 CDT 2016

Yes, you should avoid passing header map files.

They should only be used when trying to integrate with existing Xcode projects, when invoking swiftc yourself you should use the simpler header search path options (-I, -F).

 - Daniel

> On Apr 26, 2016, at 11:51 AM, Rafkind, Jon <jon.rafkind at hpe.com> wrote:
> Well I'm wondering what to do with them since I am writing a program
> that directly invokes the swift compiler code. Meaning, I create a
> swift::Module*, call swift::parseIntoSourceFile,
> swift::performTypeChecking, etc. So far it doesn't seem that I need to
> pass along the hmap files to anything in the swift codebase, perhaps the
> hmap files I see xcode adding to the swiftc lines so far are all
> superfluous.
> On 04/26/2016 11:46 AM, Daniel Dunbar wrote:
>> They are "header map" files and you are right they are very poorly documented.
>> Xcode uses them to provide the compiler with a mapping of textual include names to actual file paths.
>> What are you specifically looking into?
>> - Daniel
>>> On Apr 26, 2016, at 11:42 AM, Rafkind, Jon via swift-dev <swift-dev at swift.org> wrote:
>>> What are hmap files and how do they relate to the swift compilation
>>> process? It seems that they are a clang thing, but I can't find any
>>> documentation on them.
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