www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.ldc - CLI equivalent for 'lib-dir' configuration file option

reply axricard <axelrwiko gmail.com> writes:
Hello,

I'm trying to cross-compile with ldc for a `x86_64-windows-msvc` 
target. I followed  
https://wiki.dlang.org/Cross-compiling_with_LDC (using prebuilt 
LDC package for C runtime) and it worked just fine. But I'd like 
to get rid of the `ldc2.conf` file and have the whole work being 
done in command line.

The problem is that I can't find a replacement for the 'lib-dir' 
configuration entry in command line interface. Replacing it with 
`-L=-L$LDC_ROOT/lib-win64/ldc2-1.36.0-windows-x64/ 
-L=-L$LDC_ROOT/lib-win64/ldc2-1.36.0-windows-x64/mingw` doesn't 
work :

``` bash

 ldc2 -mtriple=x86_64-windows -L=-L$LDC_LIB/ 
 -L=-L$LDC_LIB/mingw foo.d -defaultlib=phobos2-ldc,druntime-ldc




lld-link: error: undefined symbol: __chkstk

 referenced by druntime-ldc.lib(dmain2.obj):(_d_run_main)
 referenced by druntime-ldc.lib(dmain2.obj):(_d_run_main)
 referenced by druntime-ldc.lib(dmain2.obj):(_d_run_main2)
 referenced 5 more times






Error: linking with LLD failed
```


it seems that it has to do with this [snippet in 
druntime](https://github.com/ldc-developers/druntime/blob/ldc
src/rt/msvc.d#L76), but I don't understand what changed between configuration
file and cli.

Adding '-L=/alternatename:__chkstk=___chkstk_ms' doesn't solve 
the problem.

Do you have any idea of how to make it work without ldc2.conf 
configuration file ?
May 20
parent reply kinke <noone nowhere.com> writes:
Hi! Yeah, there's no CLI equivalent for `lib-dirs`, which is 
special. See e.g. the `libDirs` occurrences in 
https://github.com/ldc-developers/ldc/blob/master/driver/linker-msvc.cpp. What
you are missing in this specific case is linking `ldc_rt.builtins.lib`, which
the compiler only does implicitly if found in `lib-dirs`, as for other
libraries (not guaranteed to be bundled with the LDC installation) and object
files.
May 20
parent axricard <axelrwiko gmail.com> writes:
On Monday, 20 May 2024 at 15:58:04 UTC, kinke wrote:

 Hi! Yeah, there's no CLI equivalent for `lib-dirs`, which is 
 special. See e.g. the `libDirs` occurrences in 
 https://github.com/ldc-developers/ldc/blob/master/driver/linker-msvc.cpp. What
you are missing in this specific case is linking `ldc_rt.builtins.lib`, which
the compiler only does implicitly if found in `lib-dirs`, as for other
libraries (not guaranteed to be bundled with the LDC installation) and object
files.


Big thanks !! I totally missed that one. For the records, here is 
the final command to fully cross-compile and cross-link :

``` bash

 LDC_WIN=$LDC_ROOT/lib-win64/ldc2-${LDC_VERSION}-windows-x64/
 ldc2 -mtriple=x86_64-windows -L=-L$LDC_WIN/lib 
 -L=-L$LDC_WIN/lib/mingw -defaultlib=phobos2-ldc,druntime-ldc 
 -L=-lldc_rt.builtins foo.d




```
May 21