rabbitmq-server @3.5.6: fails to build when python 3 is selected

[petrrr]

The port was updated, what was requested in #49276. For me however, the upgrade fails to build. I'll attach the main.log.

[ryandesign (Ryan Carsten Schmidt)]

The relevant error in the log seems to be:

:info:build rabbitmq-amqp1.0/codegen.py erl rabbitmq-amqp1.0/spec/messaging.xml rabbitmq-amqp1.0/spec/security.xml rabbitmq-amqp1.0/spec/transport.xml rabbitmq-amqp1.0/spec/transactions.xml > rabbitmq-amqp1.0/src/rabbit_amqp1_0_framing0.erl
:info:build   File "rabbitmq-amqp1.0/codegen.py", line 42
:info:build     -include("rabbit_amqp1_0.hrl")."""
:info:build                                      ^
:info:build SyntaxError: invalid syntax

What version of python is selected on your system?

[petrrr]

Good point.

I had set the default python interpreter to Python 3.4 (Macports). After resetting it to none, the build finished without problems. Probably, when installing rabbit-server @3.5.4_0 some weeks back, I had not selected any python interpreter yet, so the systems interpreter was picked.

[ryandesign (Ryan Carsten Schmidt)]

The port already contains code to set the PYTHON environment variable correctly according to the OS X version, so apparently something has changed in the build system since then such that this is no longer sufficient.

[petrrr]

I actually was revisiting this older ticket. I realized I was able to install from binary packages and therefore this probably does not surface that often. But building from source when a python 3 compiler is selected. The build still fails.

I'd assume the port would need patching to use system python.