linkers: pass system to DynamicLinker.__init__ for Darwin linkers

Apple linkers need to use different arguments on macOS and iOS-like platforms.
Pass the system to the constructor so that it can be examined.

Co-authored-by: Russell Keith-Magee <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: bonzini

mesonbuild/compilers/detect.py

@@ -1062,8 +1062,8 @@ def detect_rust_compiler(env: 'Environment', for_machine: MachineChoice) -> Rust
                                              version=cc.linker.version, **extra_args)               # type: ignore
                 else:
                     linker = type(cc.linker)(compiler, for_machine, cc.LINKER_PREFIX,
-                                             always_args=always_args, version=cc.linker.version,
-                                             **extra_args)
+                                             always_args=always_args, system=cc.linker.system,
+                                             version=cc.linker.version, **extra_args)
             elif 'link' in override[0]:
                 linker = guess_win_linker(env,
                                           override, cls, version, for_machine, use_linker_prefix=False)

mesonbuild/linkers/detect.py

@@ -122,6 +122,7 @@ def guess_nix_linker(env: 'Environment', compiler: T.List[str], comp_class: T.Ty
     env.coredata.add_lang_args(comp_class.language, comp_class, for_machine, env)
     extra_args = extra_args or []
 
+    system = env.machines[for_machine].system
     ldflags = env.coredata.get_external_link_args(for_machine, comp_class.language)
     extra_args += comp_class._unix_args_to_native(ldflags, env.machines[for_machine])
 
@@ -155,7 +156,7 @@ def guess_nix_linker(env: 'Environment', compiler: T.List[str], comp_class: T.Ty
             lld_cls = linkers.LLVMDynamicLinker
 
         linker = lld_cls(
-            compiler, for_machine, comp_class.LINKER_PREFIX, override, version=v)
+            compiler, for_machine, comp_class.LINKER_PREFIX, override, system=system, version=v)
     elif 'Snapdragon' in e and 'LLVM' in e:
         linker = linkers.QualcommLLVMDynamicLinker(
             compiler, for_machine, comp_class.LINKER_PREFIX, override, version=v)
@@ -213,7 +214,10 @@ def guess_nix_linker(env: 'Environment', compiler: T.List[str], comp_class: T.Ty
     elif 'xtools-' in o.split('\n', maxsplit=1)[0]:
         xtools = o.split(' ', maxsplit=1)[0]
         v = xtools.split('-', maxsplit=2)[1]
-        linker = linkers.AppleDynamicLinker(compiler, for_machine, comp_class.LINKER_PREFIX, override, version=v)
+        linker = linkers.AppleDynamicLinker(
+            compiler, for_machine, comp_class.LINKER_PREFIX, override,
+            system=system, version=v
+        )
     # detect linker on MacOS - must be after other platforms because the
     # "(use -v to see invocation)" will match clang on other platforms,
     # but the rest of the checks will fail and call __failed_to_detect_linker.
@@ -232,7 +236,10 @@ def guess_nix_linker(env: 'Environment', compiler: T.List[str], comp_class: T.Ty
                 break
         else:
             __failed_to_detect_linker(compiler, check_args, o, e)
-        linker = linkers.AppleDynamicLinker(compiler, for_machine, comp_class.LINKER_PREFIX, override, version=v)
+        linker = linkers.AppleDynamicLinker(
+            compiler, for_machine, comp_class.LINKER_PREFIX, override,
+            system=system, version=v
+        )
     else:
         __failed_to_detect_linker(compiler, check_args, o, e)
     return linker

mesonbuild/linkers/linkers.py

@@ -130,9 +130,11 @@ def _apply_prefix(self, arg: T.Union[str, T.List[str]]) -> T.List[str]:
 
     def __init__(self, exelist: T.List[str],
                  for_machine: mesonlib.MachineChoice, prefix_arg: T.Union[str, T.List[str]],
-                 always_args: T.List[str], *, version: str = 'unknown version'):
+                 always_args: T.List[str], *, system: str = 'unknown system',
+                 version: str = 'unknown version'):
         self.exelist = exelist
         self.for_machine = for_machine
+        self.system = system
         self.version = version
         self.prefix_arg = prefix_arg
         self.always_args = always_args