On Tuesday, 30 October 2018 at 09:10:02 UTC, Eduard Staniloiu wrote:
> On Tuesday, 30 October 2018 at 07:24:51 UTC, sarn wrote:
>> [...]
>
> Yes, this is working as expected.
>
>> [...]
>
>
> Here is the result of running `make`
> ```
> make -C /lib/modules/`uname -r`/build M=`pwd`
> make[1]: Entering directory '/usr/src/linux-headers-4.10.0-28-generic'
>   LD      /home/fawkes/ws/dlang/hello/built-in.o
>   LD [M]  /home/fawkes/ws/dlang/hello/hellomod.o
>   Building modules, stage 2.
>   MODPOST 1 modules
> WARNING: could not find /home/fawkes/ws/dlang/hello/.dsrc.o_shipped.cmd for /home/fawkes/ws/dlang/hello/dsrc.o_shipped
>   CC      /home/fawkes/ws/dlang/hello/hellomod.mod.o
>   LD [M]  /home/fawkes/ws/dlang/hello/hellomod.ko
> make[1]: Leaving directory '/usr/src/linux-headers-4.10.0-28-generic'
> ```
>
> [...]

Have you tried to build it with LDC? You might need to tweak the code generation, for example `-betterC -m64 -nodefaultlib --disable-red-zone -output-o -code-model=large -relocation-model=static`

On Tuesday, 30 October 2018 at 13:22:16 UTC, Radu wrote:
> On Tuesday, 30 October 2018 at 09:10:02 UTC, Eduard Staniloiu wrote:
>> On Tuesday, 30 October 2018 at 07:24:51 UTC, sarn wrote:
>>> [...]
>>
>> Yes, this is working as expected.
>>
>>> [...]
>>
>>
>> Here is the result of running `make`
>> ```
>> make -C /lib/modules/`uname -r`/build M=`pwd`
>> make[1]: Entering directory '/usr/src/linux-headers-4.10.0-28-generic'
>>   LD      /home/fawkes/ws/dlang/hello/built-in.o
>>   LD [M]  /home/fawkes/ws/dlang/hello/hellomod.o
>>   Building modules, stage 2.
>>   MODPOST 1 modules
>> WARNING: could not find /home/fawkes/ws/dlang/hello/.dsrc.o_shipped.cmd for /home/fawkes/ws/dlang/hello/dsrc.o_shipped
>>   CC      /home/fawkes/ws/dlang/hello/hellomod.mod.o
>>   LD [M]  /home/fawkes/ws/dlang/hello/hellomod.ko
>> make[1]: Leaving directory '/usr/src/linux-headers-4.10.0-28-generic'
>> ```
>>
>> [...]
>
> Have you tried to build it with LDC? You might need to tweak the code generation, for example `-betterC -m64 -nodefaultlib --disable-red-zone -output-o -code-model=large -relocation-model=static`

I've come back with an update.
I've managed to make it work with both `dmd` and `ldc`.

The issue was how I wrote the `Kbuild` file
// Bad Kbuild
```
EXTRA_CFLAGS = -Wall -g

obj-m = hellomod.o

hellomod-y = dsrc.o_shipped
```

I was under the false impression that `hellomod-y = dsrc.o_shipped` will add the dsrc.o object to the `hellomod.o` object and create the .ko. It doesn't do that. I believe it will only link the dsrc.o and omit the `hellomod.o`.

The correct `Kbuild` is
// Bad Kbuild
```
EXTRA_CFLAGS = -Wall -g

obj-m = mydriver.o

hellomod-y = hellomod.o dsrc.o_shipped
```

Now everything works as expected.

Thank you all for your support!

Edi