aix: detect and support the AIX dynamic linker

mesonbuild/environment.py

@@ -61,6 +61,7 @@ from .linkers import (
     PGIDynamicLinker,
     PGIStaticLinker,
     SolarisDynamicLinker,
+    AIXDynamicLinker,
     XilinkDynamicLinker,
     CudaLinker,
     VisualStudioLikeLinkerMixin,
@@ -1092,6 +1093,14 @@ class Environment:
             linker = SolarisDynamicLinker(
                 compiler, for_machine, comp_class.LINKER_PREFIX, override,
                 version=v)
+        elif 'ld: 0706-012 The -- flag is not recognized' in e:
+            if isinstance(comp_class.LINKER_PREFIX, str):
+                _, _, e = Popen_safe(compiler + [comp_class.LINKER_PREFIX + '-V'] + extra_args)
+            else:
+                _, _, e = Popen_safe(compiler + comp_class.LINKER_PREFIX + ['-V'] + extra_args)
+            linker = AIXDynamicLinker(
+                compiler, for_machine, comp_class.LINKER_PREFIX, override,
+                version=search_version(e))
         else:
             raise EnvironmentException('Unable to determine dynamic linker')
         return linker

mesonbuild/linkers.py

@@ -1141,6 +1141,38 @@ class SolarisDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
         return self._apply_prefix('-soname,{}{}.{}{}'.format(prefix, shlib_name, suffix, sostr))
 
 
+class AIXDynamicLinker(PosixDynamicLinkerMixin, DynamicLinker):
+
+    """Sys-V derived linker used on AIX"""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__('ld.aix', *args, **kwargs)
+
+    def get_always_args(self) -> T.List[str]:
+        return self._apply_prefix(['-bsvr4', '-bnoipath', '-bbigtoc']) + super().get_always_args()
+
+    def no_undefined_args(self) -> T.List[str]:
+        return self._apply_prefix(['-z', 'defs'])
+
+    def get_allow_undefined_args(self) -> T.List[str]:
+        return self._apply_prefix(['-z', 'nodefs'])
+
+    def build_rpath_args(self, env: 'Environment', build_dir: str, from_dir: str,
+                         rpath_paths: str, build_rpath: str,
+                         install_rpath: str) -> T.Tuple[T.List[str], T.Set[bytes]]:
+        all_paths = mesonlib.OrderedSet(['/opt/freeware/lib']) # for libgcc_s.a
+        for p in rpath_paths:
+            all_paths.add(os.path.join(build_dir, p))
+        if build_rpath != '':
+            all_paths.add(build_rpath)
+        if install_rpath != '':
+            all_paths.add(install_rpath)
+        return (self._apply_prefix([x for p in all_paths for x in ('-R', p)]), set())
+
+    def thread_flags(self, env: 'Environment') -> T.List[str]:
+        return ['-pthread']
+
+
 class OptlinkDynamicLinker(VisualStudioLikeLinkerMixin, DynamicLinker):
 
     """Digital Mars dynamic linker for windows."""