OK

cmake/Modules/FindPythia8.cmake

@@ -1,24 +1,51 @@
-# Locate Pythia8 library
-# in a directory defined via PYTHIA8 environment variable
-#
+# - Locate pythia8 library
 # Defines:
-#  PYTHIA8_FOUND
-#  PYTHIA8_LIBRARIES
-#  PYTHIA8_INCLUDES
+#
+#  Pythia_FOUND
+#  PYTHIA8_VERSION
+#  PYTHIA8_INCLUDE_DIR
+#  PYTHIA8_XMLDOC_DIR
+#  PYTHIA8_INCLUDE_DIRS (not cached)
+#  PYTHIA8_LIBRARY
+#  PYTHIA8_hepmcinterface_LIBRARY
+#  PYTHIA8_lhapdfdummy_LIBRARY
+#  PYTHIA8_LIBRARIES (not cached) : includes 3 libraries above; not to be used if lhapdf is used
+set(TEST_PYTHIA8_ROOT_DIR  "" ${PYTHIA8_ROOT_DIR})
+IF(TEST_PYTHIA8_ROOT_DIR STREQUAL "")
+  IF(DEFINED ENV{PYTHIA8_ROOT_DIR})
+    set(PYTHIA8_ROOT_DIR  $ENV{PYTHIA8_ROOT_DIR})
+  else()
+    set(PYTHIA8_ROOT_DIR  "/usr")
+  endif()
+endif()
 
-find_library(PYTHIA8_LIBRARY NAMES pythia8
-			     HINTS $ENV{PYTHIA8} $ENV{PYTHIA8}/lib)
+find_path(PYTHIA8_INCLUDE_DIR Pythia.h Pythia8/Pythia.h HINTS  ${PYTHIA8_ROOT_DIR}/include)
 
-set(PYTHIA8_LIBRARIES ${PYTHIA8_LIBRARY})
-#message(STATUS PYTHIA8_LIBRARIES ${PYTHIA8_LIBRARIES} )
+find_path(PYTHIA8_XMLDOC_DIR Version.xml HINTS  ${PYTHIA8_ROOT_DIR}/xmldoc  ${PYTHIA8_ROOT_DIR}/share/Pythia8/xmldoc ${PYTHIA8_ROOT_DIR}/share/pythia8-data/xmldoc  ${PYTHIA8_ROOT_DIR}/share/doc/packages/pythia/xmldoc )
 
-find_path( PYTHIA8_INCLUDES Pythia8/Pythia.h
-           HINTS $ENV{PYTHIA8} $ENV{PYTHIA8}/include $ENV{PYTHIA8}/include/Pythia8 )
-set(PYTHIA8_INCLUDES ${PYTHIA8_INCLUDES})
+if(PYTHIA8_INCLUDE_DIR AND PYTHIA8_XMLDOC_DIR)
+  file(READ ${PYTHIA8_XMLDOC_DIR}/Version.xml versionstr)
+  string(REGEX REPLACE ".*Pythia:versionNumber.*default.*[0-9][.]([0-9]+).*" "\\1" PYTHIA8_VERSION "${versionstr}")
+  set(PYTHIA8_VERSION "8.${PYTHIA8_VERSION}")
+  find_library(PYTHIA8_LIBRARY NAMES pythia8 Pythia8 HINTS ${PYTHIA8_ROOT_DIR}/lib ${PYTHIA8_ROOT_DIR}/lib64)
+  find_library(PYTHIA8_lhapdfdummy_LIBRARY NAMES lhapdfdummy  HINTS ${PYTHIA8_ROOT_DIR}/lib ${PYTHIA8_ROOT_DIR}/lib64)
+  set(PYTHIA8_INCLUDE_DIRS ${PYTHIA8_INCLUDE_DIR} ${PYTHIA8_INCLUDE_DIR}/Pythia8 ${PYTHIA8_INCLUDE_DIR}/Pythia8Plugins )
+  set(PYTHIA8_LIBRARIES ${PYTHIA8_LIBRARY})
+  if(PYTHIA8_VERSION VERSION_LESS 8.200)
+    #Is this library needed?
+    set(PYTHIA8_LIBRARIES ${PYTHIA8_LIBRARY} ${PYTHIA8_lhapdfdummy_LIBRARY})
+  endif()
+  find_file(resHEPMC3 HepMC3.h PATHS  ${PYTHIA8_INCLUDE_DIRS} NO_DEFAULT_PATH)
+  if (resHEPMC3)
+    set(Pythia8_HEPMC3_FOUND TRUE)
+  endif()
+endif()
 
-# handle the QUIETLY and REQUIRED arguments and set PYTHIA8_FOUND to TRUE if
+# handle the QUIETLY and REQUIRED arguments and set Pythia8_FOUND to TRUE if
 # all listed variables are TRUE
+
 INCLUDE(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(Pythia8 DEFAULT_MSG PYTHIA8_LIBRARIES)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Pythia8 REQUIRED_VARS PYTHIA8_INCLUDE_DIR PYTHIA8_LIBRARIES PYTHIA8_XMLDOC_DIR VERSION_VAR PYTHIA8_VERSION HANDLE_COMPONENTS)
+
+mark_as_advanced(Pythia8_FOUND PYTHIA8_INCLUDE_DIR PYTHIA8_LIBRARY PYTHIA8_LIBRARIES PYTHIA8_XMLDOC_DIR)
 
-mark_as_advanced(PYTHIA8_FOUND PYTHIA8_LIBRARIES PYTHIA8_INCLUDES)