meson | The Meson Build System | Build Tool library

I fixed it. plus, added include directories.

Try updating your rst2html5 package:

Random guess: You need some CMake-equivalent for the following line (because you are using a static library for cairo):

quartz_deps = dependency('appleframeworks', modules : ['CoreFoundation', 'ApplicationServices'], required: get_option('quartz'))

https://gitlab.freedesktop.org/cairo/cairo/-/blob/master/meson.build#L452

Just from the name of the function, CFDataGetBytes sounds like it could belong to CoreFoundation.

Related StackOverflow answer seems to be https://stackoverflow.com/a/18330634/436275

Per the accepted answer of the question above, you can apparently also use find_library to "get" frameworks.

Once you have configured your build you can do something like:

Which is the problem, the stage2 folder, has to be compiled with the 32 bit C compiler, not the 64 bit compiler.

Neither build system will let you do this in a single build... both CMake and Meson have a deeply held assumption that there is one compiler per language¹. If you need to use multiple compilers, you will need to split your build into multiple independent projects. How you orchestrate building them is up to you... with CMake, I would suggest using a superbuild with ExternalProject. With Meson, I'm not sure what the standard approach is.

^{1. Technically Meson allows you to define a host/native compiler, too (for compiling build-time tools), but it is not suitable for this case since the host might not be either target and you might well end up wanting three or more compilers in use (e.g. for ARM).}

Should I switch to CMake?

Probably not, since you already have something working with Meson. But if your build rules get complex enough, you might find CMake's ability to write functions and abstractions to be a greater benefit than a liability.

It seems like the error was because of link time optimization. MinGW doesn't seem to like link time optimization, disabling it compiles wx just fine. I found the related information from here.

You need to specify the path to your script and you can do that like this:

scirpt_path = join_paths(meson.current_source_dir(), 'my_script.sh')

and your custom target will look like this:

my_build = custom_target('my_build', command: [script_path, '-arg1'], build_always_stale: true, output: 'fake')

The reason it works for you when you don't have a subproject is because you have a structure that your build directory is in the root of your project, so it is possible to find your script with ../my_script.sh

That looks like you also need to link with python, because for some reason it's not being pulled in as a dependency of boost python adding dependency('python3') to your dependency list should solve that.

This is expected behavior. As per reference doc:

Once a subproject has been fetched, Meson will not update it automatically. For example if the wrap file tracks a git branch, it won't pull latest commits.

To pull latest version of all your subprojects at once, just run the command: