Hi all, As requested by Brad King I've written a small (ish?) design proposal for #16633 [1]. I've written it as a reStructuredText document here [2].
I'll give a short summary here:
I wish to be able to have the CTestTestfile.cmake output files generated
at an alternative location. The primary reason is to create a separate
dir-tree from the build output dir containing no intermediate build
products (unlinked object files/static archives) to save on space for
parallel CI systems.
The two primary requirements I have for a solution to this are:
1. Generate files in the alternate location to allow ctest to be
executed from that location
2. Runtime behaviour in ${CMAKE_BINARY_DIR} (build output dir)
should stay equivalent to when this option isn't used
- execution order may change, what gets executed must not
My design proposal addresses this as follows:
1. Add a new CTEST_OUTPUT_DIRECTORY test property
- similar to the RUNTIME_OUTPUT_DIRECTORY target property
2. Change CTestTestfile.cmake generation to:
a. Write its output to the new location specified in that test property
b. At the "old" location write a "redirect" statement to the new
location (using "SUBDIRS(${CTEST_OUTPUT_DIRECTORY})").
More details are in [2], but this is the gist of it.
Do you think this design idea has merit, have any suggestions for
improvements?
[1]: https://gitlab.kitware.com/cmake/cmake/issues/16633
[2]:
https://gitlab.kitware.com/muggenhor/cmake/blob/ctest-alt-dir/Help/ctest_alt_dir.rst
--
Met vriendelijke groet,
With kind regards,
Giel van Schijndel
--
"There are only two kinds of languages: the ones people complain about
and the ones nobody uses."
-- Bjarne Stroustrup
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