meson: don't build by default if used in a subproject

[v1993]

This allows to do the following in a project using cglm as a subproject and avoid building cglm's standalone library if you only use inline versions of functions:

cglm_dep = dependency(
  'cglm',
  default_options: [ 'install=false' ]
).partial_dependency(
  compile_args: true,
  includes: true,
)

# Needed since it's won't be pulled in automatically now
libm_dep = meson.get_compiler('c').find_library('m', required: false)

[recp]

@v1993 thanks for your contributions,

Should we add this to meson section of README, Docs to let users know how to use inline-only version of cglm ?

[v1993]

I think a note in readme would be nice, yes. This works with system-wide cglm as well.

[recp]

@v1993 the PR is merged, thanks for your contributions 🚀

I think a note in readme would be nice, yes. This works with system-wide cglm as well.

I'll try to add if I dont forget but any updates to README & Docs to add this note would welcome too :)

[kzhsw]

CI seems broken, any idea?

meson.build:93:11: ERROR: declare_dependency got unknown keyword arguments "build_by_default"

[v1993]

CI seems broken, any idea?

meson.build:93:11: ERROR: declare_dependency got unknown keyword arguments "build_by_default"

That's what I get for making this PR from web interface and not double-checking 🤦. The new line was supposed to go in library call just above, not declare_dependency.

[recp]

abb71a8 should fix the issue, @v1993 right?

[v1993]

abb71a8 should fix the issue, @v1993 right?

Yep, that seems to be correct. Thanks for getting this sorted out!

[recp]

@v1993 thanks 👍