From b14548d1428eeabf4460788a099f79cbc63b3086 Mon Sep 17 00:00:00 2001
From: Paul Gessinger <paul.gessinger@cern.ch>
Date: Tue, 12 Nov 2024 10:52:29 +0100
Subject: [PATCH] build: LC_ALL=C for DD4hep in setup (#3844)

This popped up in Spack builds, and can cause Xerces-C failures like:

```
Could not load a transcoding service
```

See also: https://github.com/key4hep/key4hep-spack/issues/170
---
 cmake/setup_withdeps.sh.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/setup_withdeps.sh.in b/cmake/setup_withdeps.sh.in
index b4a17641134..ce1dc3506e7 100644
--- a/cmake/setup_withdeps.sh.in
+++ b/cmake/setup_withdeps.sh.in
@@ -51,6 +51,9 @@ if [[ -d "@Geant4_DIR@" ]]; then
 fi
 if [[ -d "@DD4hep_DIR@" ]]; then
   . @DD4hep_INCLUDE_DIRS@/../bin/thisdd4hep.sh
+  # Without this, DD4hep's Xerces-C XML parsing fails with:
+  # > Could not load a transcoding service
+  export LC_ALL=C
 fi
 if [[ -d "@podio_DIR@" ]]; then
   export LD_LIBRARY_PATH="@podio_LIBRARY_DIR@:${LD_LIBRARY_PATH}"