I need to override laser-geometry (see next commit), which also needs
the distutils override. In the current implementation the distutils
override replaces the manual override. With this change, both
overrides are composed.
Without this change, gtsam is built against a vendored copy, which is
different version (3.3) than what's in nixpkgs (3.4). Dependent
packages using Eigen then fail with the following error:
/nix/store/lic85q2svs3ymv0zkgl727af9khm1x4l-ros-jazzy-gtsam-4.2.0-r4/include/gtsam/base/Vector.h:76:30: error: static assertion failed: Error: GTSAM was built against a different version of Eigen
76 | GTSAM_EIGEN_VERSION_MAJOR==EIGEN_MAJOR_VERSION,
| ^
/nix/store/lic85q2svs3ymv0zkgl727af9khm1x4l-ros-jazzy-gtsam-4.2.0-r4/include/gtsam/base/Vector.h:76:30: note: the comparison reduces to '(3 == 4)'
This is the case for mola_state_estimation (which was recently added
to ROS) as well as for some 3rd-party ROS packages I worked with.
Fixes this error:
```
> CMake Error at CMakeLists.txt:114 (message):
> Mismatch in ros-jazzy-gz-msgs-vendor version (Nix: 10.3.1, upstream:
> 10.3.2). Fix this in overrides.nix.
```
Fixes this error:
```
> CMake Error at CMakeLists.txt:114 (message):
> Mismatch in ros-jazzy-gz-common-vendor version (Nix: 5.7.0, upstream:
> 5.7.1). Fix this in overrides.nix.
```
The new hash is retrieved with `nix flake prefetch github:gazebosim/gz-common/gz-common5_5.7.1` command that returns correct old hash for the previous revision.
In the past NumPy core headers were under numpy/core/include, but in
recent nixpkgs versions, the location changed to numpy/_core/include.
NumPy >= 2.0 also includes numpy-config tool. We could use the tool to
get the correct path, instead of hardcoding it in the Nix expression,
but I'm not sure how it would work with cross-compiling, so I'm
leaving the logic as it was.
