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: key4hep/key4hep-spack#170
acts-project · Nov 12, 2024 · b14548d · b14548d
1 parent 5fc391b
commit b14548d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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}"