interpreter: Fix dependency(..., static: true) fallback

It should build the fallback subprject with default_library=static and
override the dependency for both static=True and static kwarg not given.

Fixes: #8050.

1 files changed, 46 insertions, 0 deletions

diff --git a/docs/markdown/snippets/static_fallback_override.md b/docs/markdown/snippets/static_fallback_override.md
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+++ b/docs/markdown/snippets/static_fallback_override.md
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+## `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).
+```meson
+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.
+```meson
+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'])`.