Again incompatibility Cython 3.1 and gcc<=12 (for pip)

Author: paugier

noxfile.py

@@ -128,10 +128,10 @@ def _get_modified_env(session):
 def test_with_fft_and_pythran(session):
     print_times = TimePrinter()
 
+    env_modif = _get_modified_env(session)
+
     command = "pdm sync --clean -G dev -G test -G fft -G mpi --no-self"
-    session.run_install(
-        *command.split(), external=True, env=_get_modified_env(session)
-    )
+    session.run_install(*command.split(), external=True, env=env_modif)
 
     print_times("pdm sync")
 
@@ -142,11 +142,19 @@ def test_with_fft_and_pythran(session):
 
     print_times("installing fluidsim")
 
+    # ugly workaround to force pip to build mpi4py with the modified env
+    # see https://github.com/mpi4py/mpi4py/issues/652#issuecomment-2936030256
+    session.run_install(
+        "pip", "install", "mpi4py", "-v", "--force-reinstall", env=env_modif
+    )
+
     short_names = ["fftw", "mpi_with_fftw", "fftwmpi"]
     if "GITLAB_CI" in os.environ:
         short_names.extend(["pfft", "p3dfft"])
     for short_name in short_names:
-        session.install(f"fluidfft-{short_name}")
+        session.run_install(
+            "pip", "install", f"fluidfft-{short_name}", "-v", env=env_modif
+        )
 
     _test(session)