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[Doc]: Setting up development environment guide doesn't work for Ubuntu 24.04 LTS #30961
Closed as duplicate
Description
Documentation Link
https://matplotlib.org/devdocs/devel/development_setup.html
Problem
If I follow these instructions for setting up a clean mpl-dev conda environment on Ubuntu 24.04 LTS, the editable install fails to import with an error similar to the one reported in #28357. Adding --config-settings=setup-args="-Db_lto=false" to the pip install command worked for me. The question is, should we add documentation about using setting (that I still have no clue what it did), as a troubleshooting step, or would it make more sense to have the meson code somehow detect the correct setting for LTO and avoid the problem all together?
Suggested improvement
No response
Activity
QuLogic commented on Jan 14, 2026
See #29852 (comment) I don't know why conda-forge sets the non-standard GCC_AR instead of AR, but quite frankly, I don't use conda and which of the several compiler-related feedstocks to report it to is just too confusing to figure out.
melissawm commented on Jan 14, 2026
I had the same issue on Manjaro. This may need a note in the dev docs?
QuLogic commented on Jan 16, 2026
There are three options, in increasing order of difficulty, but also in increasing order of desirability:
rcomer commented on Oct 5, 2026
This appears to have been fixed somewhere #29852 (comment)