rust: add to_system_dependency

Move the logic for system dependencies outside Cargo.interpreter and
into the rust module, so that it can be reused by the workspace object.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/mesonbuild/compilers/rust.py b/mesonbuild/compilers/rust.py
index ab0706d26..7ad7f34e9 100644
--- a/mesonbuild/compilers/rust.py
+++ b/mesonbuild/compilers/rust.py
@@ -11,6 +11,7 @@ import re
 import typing as T
 
 from .. import options
+from ..dependencies import InternalDependency
 from ..mesonlib import EnvironmentException, MesonException, Popen_safe_logged, version_compare
 from ..linkers.linkers import VisualStudioLikeLinkerMixin
 from ..options import OptionKey
@@ -73,6 +74,11 @@ def rustc_link_args(args: T.List[str]) -> T.List[str]:
         rustc_args.append(f'link-arg={arg}')
     return rustc_args
 
+
+class RustSystemDependency(InternalDependency):
+    pass
+
+
 class RustCompiler(Compiler):
 
     # rustc doesn't invoke the compiler itself, it doesn't need a LINKER_PREFIX
@@ -323,6 +329,8 @@ class RustCompiler(Compiler):
         return opts
 
     def get_dependency_compile_args(self, dep: 'Dependency') -> T.List[str]:
+        if isinstance(dep, RustSystemDependency):
+            return dep.get_compile_args()
         # Rust doesn't have dependency compile arguments so simply return
         # nothing here. Dependencies are linked and all required metadata is
         # provided by the linker flags.