meson/docs/markdown/snippets/static_fallback_override.md

static keyword argument to meson.override_dependency()

It is now possible to override shared and/or static dependencies separately. When the static keyword argument is not specified in dependency(), the first override will be used (static_dep in the example below).

static_lib = static_library()
static_dep = declare_dependency(link_with: static_lib)
meson.override_dependency('foo', static_dep, static: true)

shared_lib = shared_library()
shared_dep = declare_dependency(link_with: shared_lib)
meson.override_dependency('foo', shared_dep, static: false)

# Returns static_dep
dependency('foo')

# Returns static_dep
dependency('foo', static: true)

# Returns shared_dep
dependency('foo', static: false)

When the static keyword argument is not specified in meson.override_dependency(), the dependency is assumed to follow the value of default_library option.

dep = declare_dependency(...)
meson.override_dependency('foo', dep)

# Always works
dependency('foo')

# Works only if default_library is 'static' or 'both'
dependency('foo', static: true)

# Works only if default_library is 'shared' or 'both'
dependency('foo', static: false)

dependency() sets default_library on fallback subproject

When the static keyword argument is set but default_library is missing in default_options, dependency() will set it when configuring fallback subproject. dependency('foo', static: true) is now equivalent to dependency('foo', static: true, default_options: ['default_library=static']).