On Tue, Sep 27, 2016 at 4:03 PM, Phillip Seaver <phil@apago.com> wrote:
On 9/27/16 7:10 AM, Rene Rivera wrote:
> On Mon, Sep 26, 2016 at 2:49 PM, Phillip Seaver <phil@apago.com
> <mailto:phil@apago.com>> wrote:
>     I'm compiling FreeType with boost-build.  It has many includes
>     like this
>     "#include FT_ERRORS_H"  There's a file that defines those macros.  It
>     looks like the underlying bjam code has support for it (in
>     hdrmacro.c &
>     headers.c), but I don't see a way to make use of it in boost-build.
>     Am I missing something or is it just not exposed in a boost-build way?
> Well.. Had to go investigate that one since I didn't remember where it
> came from and is not used/exposed. Best explanation I found is from
> where the extension came from, FTJam
> <http://freetype.sourceforge.net/jam/changes.html#builtin-hdrmacro>.

It would be really helpful if I could use it.  boost-build doesn't
recognize that it needs to rebuild files when one of those header
changes, so we have to rebuild it manually.

Any suggestions on a work-around or a way to use that feature?

I guess I wasn't obvious enough about it.. You should be able to use it as is. Just call HDRMACRO some place in your Jamfiles like:

HDRMACRO /some/absolute/path/to/header/defs.h ;

Before anything else. And the regular include header scanning will use the defs in that file to replace the scanned files auto-magically (probably -- have never done it myself but that's what I see from reading the engine code).

-- Rene Rivera
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