Re: Unikraft makefile - how to copy files in Makefile.uk

[Sharan Santhanam <sharan.santhanam@xxxxxxxxx>]

Hello,

Please find the comment inline:

On 7/7/20 1:20 PM, felix nasch wrote:
> Hi,
>
> I was hanging out in the IRC channel, but it seems inactive, so I am
> asking here, hope that's ok. :)
> I am trying to port a library to Unikraft, and as part of the build process I
> want to copy around a few files after extracting the source files.
> This is to solve these two problems:
>
> 1. Some source files have the same name (in different dirs), but the
>      unikraft build system places all .obj files into the root directory, thus
>      colliding object files overwrite each other.  I want to rename conflicting
>      files prior to compilation.
Our approach to solve the problem, has been to resolve name collision 
with a '|' directive. The '|' would prepend the object file with the 
name following the pipe.
For eg, if you look at the Makefile.uk in plat/kvm/

LIBKVMPLAT_SRCS-$(CONFIG_ARCH_X86_64) += 
$(UK_PLAT_COMMON_BASE)/x86/trace.c|common
LIBKVMPLAT_SRCS-$(CONFIG_ARCH_X86_64) += $(LIBKVMPLAT_BASE)/x86/trace.c


> 2. Include paths - when extracting the source package, the include path is not
>      how consumers of the library expect it. I would want to create an
> appropriately
>      named subdir and move the header files into it.
>
> However, I can't figure out how to execute a simple "cp <src> <dest>"
> in Makefile.uk, since new targets cannot be defined.:
This is a feature we do not support yet. If you believe the problem is 
very specific to a single library, you can do something like [1].
[1] https://github.com/unikraft/lib-lua/blob/master/Makefile.uk 
<https://github.com/unikraft/lib-lua/blob/master/Makefile.uk>

> How can I do that?
>
> Thanks,
> f.