# Author: Johny Jose (johny.jose@cern.ch)
# Port of previous Makefile build to cmake
-cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 2.8.8 FATAL_ERROR)
+set(GEANT3DIR $ENV{GEANT3DIR})
ALICE_RootConfig(GEANT3_PLATFORM --arch)
-find_path(GEANT3_SYSTEM_DIR NAMES TGeant3 PATHS ${ALICE}/geant3)
+find_path(GEANT3_SYSTEM_DIR NAMES TGeant3 PATHS ${ALICE}/geant3 ${GEANT3DIR})
message(STATUS "GEANT3 system directory: ${GEANT3_SYSTEM_DIR}")
-find_path(GEANT3_INCLUDE_DIR NAMES TGeant3.h PATHS ${ALICE}/geant3/TGeant3)
+find_path(GEANT3_INCLUDE_DIR NAMES TGeant3.h PATHS ${ALICE}/geant3/TGeant3 ${GEANT3DIR}/TGeant3)
message(STATUS "GEANT3 include directory: ${GEANT3_INCLUDE_DIR}")
set(GEANT3_ROOT ${GEANT3_INCLUDE_DIR})
-find_path(GEANT3_LIBRARY_DIR NAMES libgeant321.so PATHS ${ALICE}/geant3/lib/tgt_${GEANT3_PLATFORM})
+find_path(GEANT3_LIBRARY_DIR NAMES libgeant321.so PATHS ${ALICE}/geant3/lib/tgt_${GEANT3_PLATFORM} ${GEANT3DIR}/lib/tgt_${GEANT3_PLATFORM})
message(STATUS "GEANT3 library directory: ${GEANT3_LIBRARY_DIR}")
-find_library(GEANT3_LIB NAMES geant321 PATHS ${ALICE}/geant3/lib/tgt_${GEANT3_PLATFORM})
+find_library(GEANT3_LIB NAMES geant321 PATHS ${ALICE}/geant3/lib/tgt_${GEANT3_PLATFORM} ${GEANT3DIR}/lib/tgt_${GEANT3_PLATFORM})
if (GEANT3_INCLUDE_DIR AND GEANT3_LIB AND GEANT3_SYSTEM_DIR)
set(GEANT3_FOUND TRUE)