Add support for cython_args

cython_args was previoously ignored by Meson.

mesonbuild/backend/ninjabackend.py

@@ -1615,6 +1615,7 @@ class NinjaBackend(backends.Backend):
         args += cython.get_option_compile_args(opt_proxy)
         args += self.build.get_global_args(cython, target.for_machine)
         args += self.build.get_project_args(cython, target.subproject, target.for_machine)
+        args += target.get_extra_args('cython')
 
         ext = opt_proxy[OptionKey('language', machine=target.for_machine, lang='cython')].value
 

test cases/cython/3 cython_args/cythonargs.pyx

@@ -0,0 +1,5 @@
+def test():
+    IF VALUE:
+        return 1
+    ELSE:
+        return 0

test cases/cython/3 cython_args/meson.build

@@ -0,0 +1,30 @@
+project('cython_args', ['cython', 'c'])
+
+pymod = import('python')
+python = pymod.find_installation('python3')
+python_dep = python.dependency()
+if not python_dep.found()
+  error('MESON_SKIP_TEST: Python library not found.')
+endif
+
+mod = python.extension_module(
+  'cythonargs',
+  files('cythonargs.pyx'),
+  cython_args: [
+    '--compile-time-env',
+    'VALUE=1'
+  ],
+  dependencies: [python_dep]
+)
+
+test(
+  'test',
+  python,
+  args: [
+    'test.py'
+  ],
+  workdir: meson.current_source_dir(),
+  env: environment({
+    'PYTHONPATH': meson.current_build_dir(),
+  })
+)

test cases/cython/3 cython_args/test.py

@@ -0,0 +1,3 @@
+import cythonargs
+
+assert cythonargs.test() == 1