How to read dwg file in dwgadd command.

[okuyamashin]

Hi.

What I want to do is add dimension lines to the appropriate locations in an existing DWG file.

On Amazon Web Services, I create an instance of Ubuntu 24.04 and run the following commands:
apt update
apt upgrade
apt install git autoconf libtool swig python3-dev texinfo build-essential gcc
cpan install Convert::Binary::C

Then, I run:
git clone https://github.com/LibreDWG/libredwg.git
sh autogen.sh
./configure --enable-trace
make
make install
make check

At the end of the check process, I get the message undefined symbol: dwg_setup_ENDBLK. Is this expected?

Even so, commands like dwgread, dwgwrite, and dwgadd seem to work. There is an example script: ./example/dwgadd.example.

When I run:
dwgadd -o hello.dwg dwgadd.example
I receive some warnings, but it completes successfully. However, when I open the created hello.dwg file in AutoCAD, nothing is displayed.

But if I run a command like:
dimension_aligned (10 10 0) (20 20 0) (15 25 0)
to create a DWG file and then convert it to JSON using dwgread, I can confirm that the dimension lines have been added.

However, if I include the line:
readdxf "sample.dwg"
at the beginning, I get the error:
ERROR: readdxf seen, but DWG already exists
and no DWG file is created.

Where did I go wrong?

Additional Information:
By adding apt install libffi-dev ibmpc-dev, the Perl errors during make check no longer appear.
However, it seems that SWIG is failing, and I am unable to import libredwg in Python.