docker: use newer CMake from buster-backports #36
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Use newer CMake from
buster-backports
.This makes possible to upgrade out
external_deps
, as some now require a newer CMake than the one provided by Debian Buster:For example the recent libPNG requires CMake 3.14 or higher, but Debian Buster only provides CMake 3.13.4 in its stock repositories. The
debian-backports
repository provides CMake 3.18.4 which gives use plenty of time before needing an even higher CMake.The code tests for the distribution being
buster
because the same script is also used for the Darling docker for macOS build which is running Ubuntu Focal. This also makes easier to test for newer Debian distributions for the Linux/MinGW builds.