Allow selecting the dynamic linker

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

Fixes: #6057

1 files changed, 16 insertions, 12 deletions

diff --git a/mesonbuild/linkers.py b/mesonbuild/linkers.py
index 57760f7..021134e 100644
--- a/mesonbuild/linkers.py
+++ b/mesonbuild/linkers.py
@@ -247,17 +247,21 @@ class DynamicLinker(metaclass=abc.ABCMeta):
     }  # type: typing.Dict[str, typing.List[str]]
 
     def _apply_prefix(self, arg: str) -> typing.List[str]:
-        if isinstance(self.prefix_arg, str):
+        if self.prefix_arg is None:
+            return [arg]
+        elif isinstance(self.prefix_arg, str):
             return [self.prefix_arg + arg]
         return self.prefix_arg + [arg]
 
     def __init__(self, exelist: typing.List[str], for_machine: mesonlib.MachineChoice,
-                 id_: str, prefix_arg: typing.Union[str, typing.List[str]], *, version: str = 'unknown version'):
+                 id_: str, prefix_arg: typing.Union[str, typing.List[str]],
+                 always_args: typing.List[str], *, version: str = 'unknown version'):
         self.exelist = exelist
         self.for_machine = for_machine
         self.version = version
         self.id = id_
         self.prefix_arg = prefix_arg
+        self.always_args = always_args
 
     def __repr__(self) -> str:
         return '<{}: v{} `{}`>'.format(type(self).__name__, self.version, ' '.join(self.exelist))
@@ -276,7 +280,7 @@ class DynamicLinker(metaclass=abc.ABCMeta):
         return mesonlib.is_windows()
 
     def get_always_args(self) -> typing.List[str]:
-        return []
+        return self.always_args.copy()
 
     def get_lib_prefix(self) -> str:
         return ''
@@ -715,7 +719,7 @@ class ArmDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
 
     def __init__(self, for_machine: mesonlib.MachineChoice,
                  *, version: str = 'unknown version'):
-        super().__init__(['armlink'], for_machine, 'armlink', '',
+        super().__init__(['armlink'], for_machine, 'armlink', '', [],
                          version=version)
 
     def get_accepts_rsp(self) -> bool:
@@ -853,33 +857,33 @@ class MSVCDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
 
     """Microsoft's Link.exe."""
 
-    def __init__(self, for_machine: mesonlib.MachineChoice, *,
+    def __init__(self, for_machine: mesonlib.MachineChoice, always_args: typing.List[str], *,
                  exelist: typing.Optional[typing.List[str]] = None,
                  prefix: typing.Union[str, typing.List[str]] = '',
                  machine: str = 'x86', version: str = 'unknown version'):
         super().__init__(exelist or ['link.exe'], for_machine, 'link',
-                         prefix, machine=machine, version=version)
+                         prefix, always_args, machine=machine, version=version)
 
 
 class ClangClDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
 
     """Clang's lld-link.exe."""
 
-    def __init__(self, for_machine: mesonlib.MachineChoice, *,
+    def __init__(self, for_machine: mesonlib.MachineChoice, always_args: typing.List[str], *,
                  exelist: typing.Optional[typing.List[str]] = None,
                  prefix: typing.Union[str, typing.List[str]] = '',
                  version: str = 'unknown version'):
-        super().__init__(exelist or ['lld-link.exe'], for_machine,
-                         'lld-link', prefix, version=version)
+        super().__init__(exelist or ['lld-link.exe'], for_machine, 'lld-link',
+                         prefix, always_args, version=version)
 
 
 class XilinkDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
 
     """Intel's Xilink.exe."""
 
-    def __init__(self, for_machine: mesonlib.MachineChoice,
+    def __init__(self, for_machine: mesonlib.MachineChoice, always_args: typing.List[str],
                  *, version: str = 'unknown version'):
-        super().__init__(['xilink.exe'], for_machine, 'xilink', '', version=version)
+        super().__init__(['xilink.exe'], for_machine, 'xilink', '', always_args, version=version)
 
 
 class SolarisDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
@@ -936,7 +940,7 @@ class OptlinkDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
                  *, version: str = 'unknown version'):
         # Use optlink instead of link so we don't interfer with other link.exe
         # implementations.
-        super().__init__(['optlink.exe'], for_machine, 'optlink', prefix_arg='', version=version)
+        super().__init__(['optlink.exe'], for_machine, 'optlink', '', [], version=version)
 
     def get_allow_undefined_args(self) -> typing.List[str]:
         return []