Allow selecting the dynamic linker

This uses the normal meson mechanisms, an LD environment variable or via
cross/native files.

Fixes: #6057

4 files changed, 19 insertions, 1 deletions

diff --git a/mesonbuild/compilers/compilers.py b/mesonbuild/compilers/compilers.py
index 52a2788..818c62c 100644
--- a/mesonbuild/compilers/compilers.py
+++ b/mesonbuild/compilers/compilers.py
@@ -1178,6 +1178,12 @@ class Compiler:
     def get_dependency_link_args(self, dep):
         return dep.get_link_args()
 
+    @classmethod
+    def use_linker_args(cls, linker: str) -> typing.List[str]:
+        """Get a list of arguments to pass to the compiler to set the linker.
+        """
+        return []
+
 
 def get_largefile_args(compiler):
     '''
diff --git a/mesonbuild/compilers/mixins/gnu.py b/mesonbuild/compilers/mixins/gnu.py
index 64b0d3b..6683486 100644
--- a/mesonbuild/compilers/mixins/gnu.py
+++ b/mesonbuild/compilers/mixins/gnu.py
@@ -299,6 +299,10 @@ class GnuLikeCompiler(metaclass=abc.ABCMeta):
             return ['-isystem' + path]
         return ['-I' + path]
 
+    @classmethod
+    def use_linker_args(cls, linker: str) -> typing.List[str]:
+        return ['-fuse-ld={}'.format(linker)]
+
 
 class GnuCompiler(GnuLikeCompiler):
     """
diff --git a/mesonbuild/compilers/mixins/visualstudio.py b/mesonbuild/compilers/mixins/visualstudio.py
index 60b07c4..4798bdc 100644
--- a/mesonbuild/compilers/mixins/visualstudio.py
+++ b/mesonbuild/compilers/mixins/visualstudio.py
@@ -381,3 +381,7 @@ class VisualStudioLikeCompiler(metaclass=abc.ABCMeta):
 
     def get_argument_syntax(self) -> str:
         return 'msvc'
+
+    @classmethod
+    def use_linker_args(cls, linker: str) -> typing.List[str]:
+        return []
diff --git a/mesonbuild/compilers/rust.py b/mesonbuild/compilers/rust.py
index a17b697..405afea 100644
--- a/mesonbuild/compilers/rust.py
+++ b/mesonbuild/compilers/rust.py
@@ -32,7 +32,7 @@ rust_optimization_args = {'0': [],
 
 class RustCompiler(Compiler):
 
-    LINKER_PREFIX = '-Wl,'
+    # rustc doesn't invoke the compiler itself, it doesn't need a LINKER_PREFIX
 
     def __init__(self, exelist, version, for_machine: MachineChoice,
                  is_cross, info: 'MachineInfo', exe_wrapper=None, **kwargs):
@@ -109,3 +109,7 @@ class RustCompiler(Compiler):
 
     def get_std_exe_link_args(self):
         return []
+
+    # Rust does not have a use_linker_args because it dispatches to a gcc-like
+    # C compiler for dynamic linking, as such we invoke the C compiler's
+    # use_linker_args method instead.