From: Shirong_Wang <srwang20@fudan.edu.cn>
Date: Sat, 16 Aug 2025 20:35:43 +0800
Subject: Add object copy for f2py meson backend

Origin: upstream, https://github.com/numpy/numpy/pull/29572
Bug: https://github.com/numpy/numpy/issues/28191
Bug-Debian: https://bugs.debian.org/1078861
---
 numpy/f2py/_backends/_meson.py            | 13 +++++++++++++
 numpy/f2py/_backends/meson.build.template |  3 +++
 numpy/f2py/tests/test_f2py2e.py           | 19 +++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/numpy/f2py/_backends/_meson.py b/numpy/f2py/_backends/_meson.py
index cbd9b0e..4c498ba 100644
--- a/numpy/f2py/_backends/_meson.py
+++ b/numpy/f2py/_backends/_meson.py
@@ -50,6 +50,7 @@ class MesonTemplate:
         self.pipeline = [
             self.initialize_template,
             self.sources_substitution,
+            self.objects_substitution,
             self.deps_substitution,
             self.include_substitution,
             self.libraries_substitution,
@@ -79,6 +80,11 @@ class MesonTemplate:
             [f"{self.indent}'''{source}'''," for source in self.sources]
         )
 
+    def objects_substitution(self) -> None:
+        self.substitutions["obj_list"] = ",\n".join(
+            [f"{self.indent}'''{obj}'''," for obj in self.objects]
+        )
+
     def deps_substitution(self) -> None:
         self.substitutions["dep_list"] = f",\n{self.indent}".join(
             [f"{self.indent}dependency('{dep}')," for dep in self.deps]
@@ -186,6 +192,7 @@ class MesonBackend(Backend):
 
     def compile(self) -> None:
         self.sources = _prepare_sources(self.modulename, self.sources, self.build_dir)
+        _prepare_objects(self.modulename, self.extra_objects, self.build_dir)
         self.write_meson_build(self.build_dir)
         self.run_meson(self.build_dir)
         self._move_exec_to_root(self.build_dir)
@@ -216,6 +223,12 @@ def _prepare_sources(mname, sources, bdir):
     ]
     return extended_sources
 
+def _prepare_objects(mname, objects, bdir):
+    Path(bdir).mkdir(parents=True, exist_ok=True)
+    # Copy objects
+    for obj in objects:
+        if Path(obj).exists() and Path(obj).is_file():
+            shutil.copy(obj, bdir)
 
 def _get_flags(fc_flags):
     flag_values = []
diff --git a/numpy/f2py/_backends/meson.build.template b/numpy/f2py/_backends/meson.build.template
index 32b4a71..c521565 100644
--- a/numpy/f2py/_backends/meson.build.template
+++ b/numpy/f2py/_backends/meson.build.template
@@ -42,6 +42,9 @@ ${source_list},
                      include_directories: [
                      inc_np,
 ${inc_list}
+                     ],
+                     objects: [
+${obj_list}
                      ],
                      dependencies : [
                      py_dep,
diff --git a/numpy/f2py/tests/test_f2py2e.py b/numpy/f2py/tests/test_f2py2e.py
index 2f91eb7..959e152 100644
--- a/numpy/f2py/tests/test_f2py2e.py
+++ b/numpy/f2py/tests/test_f2py2e.py
@@ -673,6 +673,25 @@ def test_inclheader(capfd, hello_world_f90, monkeypatch):
             assert "#include <stdbool.h>" in ocmr
             assert "#include <stdio.h>" in ocmr
 
+@pytest.mark.skipif((platform.system() != 'Linux'), reason='Compiler required')
+def test_cli_obj(capfd, hello_world_f90, monkeypatch):
+    """Ensures that the extra object can be specified when using meson backend
+    """
+    ipath = Path(hello_world_f90)
+    mname = "blah"
+    odir = "tttmp"
+    obj = "extra.o"
+    monkeypatch.setattr(sys, "argv",
+                        f'f2py --backend meson --build-dir {odir} -m {mname} -c {obj} {ipath}'.split())
+
+    with util.switchdir(ipath.parent):
+        Path(obj).touch()
+        compiler_check_f2pycli()
+        with Path(f"{odir}/meson.build").open() as mesonbuild:
+            mbld = mesonbuild.read()
+            assert "objects:" in mbld
+            assert f"'''{obj}'''" in mbld
+
 
 def test_inclpath():
     """Add to the include directories