I've added a commit to require GDAL_USE_PCODEC to be explicitly set to
ON to trigger download from source repositories (ie when cpcodec isn't
already built and available on the build system). Mostly for license
compliance, since Pcodec is Apache 2, and we want user consent before
embedding such code.
Le 12/06/2026 à 01:24, Even Rouault via gdal-dev a écrit :
Hi,
We are in the situation where we are about to have our first Rust
direct (optional) dependency. This is for the "pcodec" lossless codec
(https://github.com/pcodec/pcodec) that is used by some Zarr datasets.
It offers a "cpcodec" crate with C bindings which we can use.
I've tried in https://github.com/OSGeo/gdal/pull/14779 to offer
different options:
- by default to satisfy "casual" developers building GDAL who are
mostly seeking ease of build and are fine with automatic download of
dependencies (pcodec and corrosion-rs for the CMake rust integration),
using git at CMake time,
- as well as offering more control with manual settings - either by
pointing directly to an already installed cpcodec library, or by
pointing to the locations of the source tree of corrosion-rs and
pcodec - that should be more compatible of policies/constraints
of packagers.
Review of people who might have integrated Rust crates in CMake C/C++
projects welcome. See the PR description for details.
Even
--
http://www.spatialys.com
My software is free, but my time generally not.
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