Using systemDependencies in DUB

Timoses timosesu at gmail.com
Sun Jun 24 12:15:42 UTC 2018


On Sunday, 24 June 2018 at 11:44:06 UTC, Dechcaudron wrote:
> Hi,
>
> I'm trying to use dub to compile a quick experiment that uses 
> Deimos libclang bindings, which of course requires linking 
> against an installed libclang. I believe this is what I need to 
> include in dub.json:
>
>  "systemDependencies": "libclang-6.0"
>
> But it just won't link against the lib in the compilation 
> process. Using the -v option reveals the linking stage call:
>
> /usr/bin/dmd 
> -of.dub/build/application-debug-linux.posix-x86_64-dmd_2081-7C29937BC9011750CFA15D7325224156/damnc .dub/build/application-debug-linux.posix-x86_64-dmd_2081-7C29937BC9011750CFA15D7325224156/damnc.o -L--no-as-needed -g
>
> It does not mention libclang at all. I've tried with all 
> "clang", "libclang-6.0.so.1", but I just don't seem to be able 
> to make it work. Would anyone mind helping me out?
>
> BTW, I am aware Deimos bindings for libclang are based on v3.7 
> and not 6.0, but 3.7 is not available for Ubuntu 18.04 and I 
> was wagering the interface probably hasn't changed much.

Hm, the description sounds like it might not be used for passing 
linker arguments, but serves for adding documentation to linker 
errors:
     "A textual description of the required system dependencies 
(external C libraries)
     required by the package. This will be visible on the registry 
and will be
     displayed in case of linker errors - this setting does not 
support platform
     suffixes".

What about the "libs" build settings (or "lflags")? 
(http://code.dlang.org/package-format?lang=json)

     "libs": "clang"


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