Re: Unikraft stock project helloworld-cpp not compiling

[Malte Münch <mamu@xxxxxxxxxxxxx>]

Hi,

i think i found the issue and i mailed the solution to Simon yesterday
already :) libnewlib is not activated in the config, when i activate the
libnewlib library it compiles without any issues.

I initialized my app-directory with "kraft up -p kvm -m x86_64
helloworld-cpp" i don't know if this made a difference. As far as i
remember i didnt have issues with wrong KVM or Xen settings.

The question is how to tell kraft to enable newlib directly. As far as i
can see it is already enabled in the kraft.yaml here:

https://github.com/unikraft/app-helloworld-cpp/blob/staging/kraft.yaml

Best regards and thanks for your answer

Malte

On 29.05.20 15:14, Jung, Alexander wrote:
> Hi Malte,
> 
> Apologies for the delayed response!
> 
> I just tried this slightly verbose method myself:
> 
> ```bash
> $ pip3 install 
> git+https://github.com/unikraft/kraft.git@99cdb90d76c73c74b3b66995ca64a8aad49e6b58
> $ mkdir app-cpp
> $ cd app-cpp
> $ kraft init -a helloworld-cpp app-cpp
> $ kraft configure -m x86_64 -p kvm
> $ kraft build
> ```
> 
> And was able to re-create the same problem.  Looks like the configuration was 
> set to Xen and not KVM.  There is a quick fix for this and that it is to 
> delete the local `.config` and remove `xen: true` and `linuxu: true` from the 
> kraft.yaml file. 
> 
> I'll have a look at why kraft is forcing a Xen configuration over a KVM 
> selection and push an update as this should not be the default functionality.
> 
> However, when I force the change to KVM, it still get this error.  I am 
> cc'ing Simon to have a look at this too.
> 
> Cheers,
> 
> Alexander
> 
> On 20.05.20, 18:15, "Minios-devel on behalf of Malte Münch" 
> <minios-devel-bounces@xxxxxxxxxxxxxxxxxxxx on behalf of mamu@xxxxxxxxxxxxx> 
> wrote:
> 
> Hello Unikraft-devs,
> 
> i am not able to compile the current 0.4 Verion of Unikraft with the
> Hello-World example written in C++. Here is what i tried:
> 
> kraft up -m x86_64 -p kvm helloworld-cpp
> 
> The process crashes with the following error:
> 
> In file included from
> /home/pg635/helloworldcpp/build/libcxx/origin/libcxx-7.0.0.src/include/iosfwd:90,
>                  from
> /home/pg635/helloworldcpp/build/libcxx/origin/libcxx-7.0.0.src/include/ios:215,
>                  from
> /home/pg635/helloworldcpp/build/libcxx/origin/libcxx-7.0.0.src/include/iostream:38,
>                  from /home/pg635/helloworldcpp/helloworld.cpp:1:
> /home/pg635/helloworldcpp/build/libcxx/origin/libcxx-7.0.0.src/include/wchar.h:119:15:
> fatal error: wchar.h: no such file or directory
>  #include_next <wchar.h>
>                ^~~~~~~~~
> 
> kraft itself works and i am able to compile and run the Helloworld
> application written in C.
> 
> Looking forward to your replies.
> 
> Best
> Malte
>