We attempted to set the C++ version in standard.meson.build, but this
does not work well as the option name varies by platform, and it also
triggers a warning in meson. This fix moves the setting into each
meson.build project() default_options. As there are only a handful
of these, the maintenance burden is not high.
Fixes: #14432
Relates-to: #14355
Build-bot: build
Test-bot: skip
* Adds `VERSION_WITH_TAG` variable to standard.meson.build
* Consistently uses `file('VERSION.md')` to retrieve version number
Note that VERSION_WITH_TAG is not yet used but should be used for
version tagged files later.
Most warnings have been cleaned up:
* min meson version is now 1.0
* additional parameters such as check, recursive added
* uses now global_source_root() instead of source_root()
* catting files on Windows wasn't actually working -- used in unit
tests. This is because meson passes paths with forward slashes to
cmd.exe `type` command, which doesn't understand them. This is bad,
because we were running effectively null tests for the affected tests.
Fortunately, the same tests were configured correctly on macOS and
Linux, and were all passing, so no serious damage.
There is one significant warning left:
`WARNING: Project targets '>=1.0' but uses feature deprecated since
'0.64.0': copy arg in configure_file. Use fs.copyfile instead`
Refer to mesonbuild/meson#12792. I have opened a PR against that to
undeprecate `copy` kwarg in a future version of meson.
Fixes: #8399
