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fix EXPAT::EXPAT-NOTFOUND when building with Geant4 on conda

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Geant4's G4EXPATShim creates EXPAT::EXPAT (uppercase) with
IMPORTED_LOCATION set to ${EXPAT_LIBRARY}, which is empty when EXPAT
is found via conda's config-mode package (expat::expat, lowercase).

After find_package(Geant4), patch EXPAT::EXPAT with the real library
path taken from expat::expat IMPORTED_LOCATION_NOCONFIG, falling back
to find_library if needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
AndreaRigoni
2026-04-03 08:41:00 +00:00
parent 7f558f4f30
commit ea1aec04bd
1 changed files with 20 additions and 0 deletions
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20
CMakeLists.txt
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@@ -169,6 +169,26 @@ if(Geant4_FOUND)
add_compile_definitions(HAVE_GEANT4)
set(HAVE_GEANT4 1)
# Workaround: Geant4's G4EXPATShim creates EXPAT::EXPAT (uppercase) with
# IMPORTED_LOCATION "${EXPAT_LIBRARY}", but EXPAT_LIBRARY is empty when using
# conda's config-mode expat package (which installs as expat::expat lowercase).
# Resolve the actual library path from expat::expat or via find_library.
if(TARGET EXPAT::EXPAT)
get_target_property(_expat_loc EXPAT::EXPAT IMPORTED_LOCATION)
if(NOT _expat_loc OR _expat_loc MATCHES "NOTFOUND|^$")
if(TARGET expat::expat)
get_target_property(_expat_loc expat::expat IMPORTED_LOCATION_NOCONFIG)
endif()
if(NOT _expat_loc OR _expat_loc MATCHES "NOTFOUND|^$")
find_library(_expat_loc NAMES expat)
endif()
if(_expat_loc)
set_target_properties(EXPAT::EXPAT PROPERTIES IMPORTED_LOCATION "${_expat_loc}")
endif()
endif()
unset(_expat_loc)
endif()
# Sanitize Geant4 targets to remove Qt5 dependencies that conflict with VTK/Qt6
if(TARGET Geant4::G4interfaces)
set_target_properties(Geant4::G4interfaces PROPERTIES