Re: How to provide header files for 0compile

On Thu, 2017-07-06 at 20:43 +0100, Thomas Leonard wrote:
> On 5 July 2017 at 14:57, Eric Duhamel <[email protected]> wrote:
> > I've gotten pretty handy with 0install when it comes to packaging
> > binaries
> > with required libraries, but I don't yet know how to do the same
> > for
> > 0compile.
> > 
> > Documentation for 0compile says "For header files (-dev packages),
> > there
> > will often be a source implementation that generates the header
> > files...".
> > In my case I don't think there is a source implementation and I'm
> > not sure
> > how to make one.
> > 
> > I want to write a feed that can tell 0compile how to build a
> > program from
> > source. The program source uses Make, but it requires several -dev
> > packages.
> > I have access to said packages and the header files inside. How do
> > I tell
> > 0compile to use the header files when compiling from source?
> 
> Just use <requires> as for any other dependency, and depend on the
> interface that provides the header files. You can either add the
> headers to the include path directly with an environment variable or,
> if the header files use pkg-config, add the .pc file to the pkg-
> config
> path. Make sure you use relative paths in the .pc files in that case
> (e.g. ${pcfiledir}/../../include).

Thank you. After a lot of digging I found some of the environment
variables I need to insert to are CPATH and LIBRARY_PATH (not
LD_LIBRARY_PATH). pkg-config sounds automagical which would be great,
but I haven't tried it yet.

For this particular program (Eureka 1.21) I couldn't get 0compile to
build it. The applicable error line returned was

[code]make: *** No rule to make target 'obj_linux/e_basis.o', needed by
'eureka'.  Stop.[/code]

I was able to make it compile without using 0install by adding the
appropriate paths to CPATH and LIBRARY_PATH and calling make, so don't
know why 0compile would fail.

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