rust: add rust_dynamic_std option

As an initial implementation, simply adding "-C prefer-dynamic" works
for binary crates (as well as dylib and proc-macro that already used it).
In the future this could be extended to other crate types.  For more
information see the comment in the changed file, as well as
https://github.com/mesonbuild/meson/issues/8828 and
https://github.com/mesonbuild/meson/issues/14215.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/docs/markdown/snippets/rust-dynamic-std.md b/docs/markdown/snippets/rust-dynamic-std.md
new file mode 100644
index 0000000..ac4e8a7
--- /dev/null
+++ b/docs/markdown/snippets/rust-dynamic-std.md
@@ -0,0 +1,7 @@
+## New experimental option `rust_dynamic_std`
+
+A new option `rust_dynamic_std` can be used to link Rust programs so
+that they use a dynamic library for the Rust `libstd`.
+
+Right now, `staticlib` crates cannot be produced if `rust_dynamic_std` is
+true, but this may change in the future.