Re: Using a betterC dub package in ordinary D

[Ferhat Kurtulmuş via Digitalmars-d-learn]

On Friday, 8 January 2021 at 18:28:36 UTC, Ferhat Kurtulmuş wrote:
On Friday, 8 January 2021 at 15:40:12 UTC, Bastiaan Veelo wrote:
Hi,
When I use earcutd [1] in an ordinary D project, I get a link 
error for the __D7earcutd12__ModuleInfoZ symbol. This is 
because the earcutd dub.json has `"dflags": ["-betterC"]`. I 
think this is in error, my understanding of betterC code is 
that it can be compiled with "-betterC", but does not need to 
(and must not when used in D context).

Am I right? What are the best practices for betterC dub 
packages?

Thanks,
Bastiaan.


[1] https://code.dlang.org/packages/earcutd

Dear Bastiaaan,

I am not an expert in dub system, but I have just pushed a 
modification in dub.json. I am not sure if it solves your 
problem. My modification is

    "configurations": [
        {
            "name": "default",
            "targetType": "library"
        },
        {
            "name": "betterC",
            "targetType": "library",
            "dflags": ["-betterC"]
        }
    ]

now client projects must explicitly pass the subConfiguration 
parameter to compile it with betterC.

I also added this:

version(LDC){
    version(D_BetterC){
        pragma(LDC_no_moduleinfo);
    }
}

Docs say

LDC_no_moduleinfo
This pragma disables the generation of the ModuleInfo metadata to 
register the current module with druntime. Note that this, among 
other things, leads to any static constructors not being run, and 
should only be used in very specific circumstances.

I used that pragma against an error, but I cannot remember what 
was that.