From 63c75f0a38155420ba1f9a3cb05ff1e8ef089d93 Mon Sep 17 00:00:00 2001
From: Frithjof Gressmann <frithjof@noc.io>
Date: Sat, 23 Aug 2025 15:21:12 -0500
Subject: [PATCH 1/2] Ensure correct MPI linking

This instructs uv to ignore prebuild mpi4py binaries to ensure proper
linking against the available MPI version. Furthermore, this updates
the linker language for the io module to C++ to prevent ABI mismatch.
---
 pyproject.toml                | 15 ++++++++-------
 python/neuroh5/CMakeLists.txt |  2 +-
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 121197d..db39dfd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,13 +1,14 @@
 [build-system]
-requires = ["setuptools", "wheel", "numpy >= 1.21.6", "mpi4py >= 3.0.0",]
+requires = ["setuptools", "wheel", "numpy >= 1.21.6", "mpi4py >= 3.0.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "neuroh5"
 dynamic = ["version", "description", "entry-points", "maintainers", "readme"]
-dependencies = [
-  "click",
-  "h5py >= 3.0",
-  "numpy >= 1.21.6",
-  "mpi4py >= 3.0.0",
-]
\ No newline at end of file
+dependencies = ["click", "h5py >= 3.0", "numpy >= 1.21.6", "mpi4py >= 3.0.0"]
+
+[tool.uv]
+no-binary-package = ["mpi4py"]
+
+[tool.uv.pip]
+no-binary = ["mpi4py"]
diff --git a/python/neuroh5/CMakeLists.txt b/python/neuroh5/CMakeLists.txt
index be1206b..8d38fcd 100644
--- a/python/neuroh5/CMakeLists.txt
+++ b/python/neuroh5/CMakeLists.txt
@@ -21,7 +21,7 @@ set_target_properties(
     PROPERTIES
         PREFIX ""
         OUTPUT_NAME ${NEUROH5_IO_PYTHON_C_MODULE_NAME}
-        LINKER_LANGUAGE C
+        LINKER_LANGUAGE CXX
 )
 
 

From 139a206e921c9b75c09b300e22ae7c42428b660a Mon Sep 17 00:00:00 2001
From: Frithjof Gressmann <frithjof@noc.io>
Date: Mon, 25 Aug 2025 14:48:30 -0500
Subject: [PATCH 2/2] Rollback to C linking

---
 python/neuroh5/CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/neuroh5/CMakeLists.txt b/python/neuroh5/CMakeLists.txt
index 8d38fcd..be1206b 100644
--- a/python/neuroh5/CMakeLists.txt
+++ b/python/neuroh5/CMakeLists.txt
@@ -21,7 +21,7 @@ set_target_properties(
     PROPERTIES
         PREFIX ""
         OUTPUT_NAME ${NEUROH5_IO_PYTHON_C_MODULE_NAME}
-        LINKER_LANGUAGE CXX
+        LINKER_LANGUAGE C
 )