spksrc.native-cmake.mk

[th0ma7]

Motivation: Some native package requires cmake to be built. New Makefile definitions helpers allows building them easily. Included in this PR is an example to build ninja using spksrc.native-cmake*.mk helper files.
Linked issues: #4307

Checklist

• Build rule all-supported completed successfully
• Package upgrade completed successfully
• New installation of package completed successfully

Important note

The usage of a specific native/cmake version is not mandatory as default Debian image already provides one. In the example provided ninja needed an earlier version thus spksrc.native-cmake-env.mk helper code make usage of the following:

# Use native cmake
DEPENDS += native/cmake
CMAKE_PATH = $(WORK_DIR)/../../../native/cmake/work-native/install/usr/local/bin
ENV += PATH=$(CMAKE_PATH):$$PATH

If this PR is being merge, the usage of native/cmake within spksrc.native-cmake*.mk could in theory be discarded.

[hgy59]

@th0ma7 is there a reason not to remove the installed cmake completely (from Dockerfile) and only use native/cmake?
This would keep the .mk files clean (avoid spksrc.native-cmake.mk files)

Edit:
ooh, I see, it takes a long time to build CMake from scratch.
and I have to search the comments here, why not taking the debian buster backport CMake v3.16.3

[th0ma7]

@hgy59 it all started with the need of having native/ninja which in turns needed a spksrc.native-cmake.mk so I could build native package using cmake. It turned out that ninja also needed a newer version of cmake which led to the addition of native/cmake as well.

In the end the default Debian ninja works great so there is no need for neither native/ninja or native/cmake. Althgouh the spksrc.native-cmake*.mk can still be of interest. Question is: what to do about them?

Personally I would (and had done previously):

• remove native/ninja and native/cmake
• remove references to native/cmake in spksrc.native-cmake*.mk
• keep the spksrc.native-cmake*.mk

But then again, without any examples or usages, is it really worth it? @ymartin59 was suggesting to just be keeping the PR alive in case we ever need it.

[hgy59]

@ymartin59 was suggesting to just be keeping the PR alive in case we ever need it.

you can create a branch like native-cmake in this repo (similar as we have dsm7 branch) and create and merge a PR with the spksrc.native-cmake*.mk files there, so these are not lost.