With pixi, tests link to pinocchio in .pixi/envs folder

[abussy-aldebaran]

Bug description

When using pixi to build pinocchio, after a ninja install, tests link with pinocchio's libs that are installed in .pixi/envs/....

Expected behavior

When using pixi to build pinocchio, after a ninja install, tests link with pinocchio's libs that are in the build tree.

Reproduction steps

Steps to reproduce the behavior:

pixi run configure
pixi shell
cd build
ninja
ldd unittest/pinocchio-test-cpp-model | grep pinocchio_default
	libpinocchio_default.so.3.4.0 => /home/antoine.bussy/work/pinocchio/build/src/libpinocchio_default.so.3.4.0 (0x00007b8be4e00000)
ninja install
ldd unittest/pinocchio-test-cpp-model | grep pinocchio_default
	libpinocchio_default.so.3.4.0 => /home/antoine.bussy/work/pinocchio/.pixi/envs/default/lib/libpinocchio_default.so.3.4.0 (0x00007c5e9de00000)

Additional context

One possible cause is setting CMAKE_INSTALL_PREFIX=$CONDA_PREFIX in pixi.toml.

System

• OS: ubuntu 24.04
• Pinocchio version: devel (2f33ea1)

[abussy-aldebaran]

I'm willing to submit a PR if you tell me if and how you wish to fix this.

[jcarpent]

I do think @jorisv is the best to provide the proper guidance.
Thanks a lot, @abussy-aldebaran, for this issue and your willingness.

[abussy-aldebaran]

You're welcome.
Here are some ideas :

1. Set CMAKE_INSTALL_PREFIX to install, to mirror the build folder
2. I wonder if installing makes sense in a pixi setup ? If no, the install target could be disabled with CMAKE_SKIP_INSTALL_RULES (https://cmake.org/cmake/help/latest/variable/CMAKE_SKIP_INSTALL_RULES.html)