Build fails with Meson 0.60.0

[Tachi107]

Since this is related only to the build system, I'm skipping the issue template.

In the meson.build file, a message is printed describing the status of the build (host cpu, os, release, etc...). Those messages are printed by passing an array to message(), even if according to the documentation you can only pass it one or more strings.

In previous versions of Meson this did not cause any issue, as the array was flattened and booleans were converted to strings, but this does not seem true anymore; the following lines cause Meson to throw an error saying "Function accepts only strings, integers, lists, dictionaries and lists thereof.".

tomlplusplus/meson.build

Lines 49 to 52 in ca76e5d

	message(['is_release', is_release])
	message(['is_windows', is_windows])
	message(['is_x64', is_x64])
	message(['has_exceptions', has_exceptions])

Since the documentation does not mention the possibility of passing booleans to message() this could be considered an issue of tomlplusplus' meson.build file, but this started happening only with this latest release, and I'm going to report it upstream as well.

[marzer]

Ah thanks for letting me know.

I'm going to report it upstream as well.

Definitely a good move. Seems an odd design choice to accept compositions of strings and ints, but not booleans. I'd have to imagine that's an oversight.

[Tachi107]

Will be fixed in mesonbuild/meson#9447 :)

[marzer]

Awesome, thanks @Tachi107. I've pushed an interim fix to use string.format() instead of passing a list with booleans to message() so that should satisfy older versions of meson, too.

[Tachi107]

Nice solution, thanks!