evtgen-2.0.0.patch

--- a/src/EvtGenExternal/EvtPythiaEngine.cpp.orig	2020-04-24 18:27:48.000000000 +0200
+++ b/src/EvtGenExternal/EvtPythiaEngine.cpp	2021-04-14 09:17:55.660743600 +0200
@@ -36,7 +36,13 @@
 
 #include <cmath>
 #include <iostream>
-#include <sstream>
+#include <sstream>  
+
+#if PYTHIA_VERSION_INTEGER < 8304
+typedef Pythia8::ParticleDataEntry* ParticleDataEntryPtr;
+#else
+typedef Pythia8::ParticleDataEntryPtr ParticleDataEntryPtr;
+#endif
 
 using std::endl;
 
@@ -430,9 +436,9 @@
         // or assignment will give it a different memory address and it will no longer refer to
         // the original particleData information from the generator pointer.
 
-        Pythia8::ParticleDataEntry* entry_generic =
+        ParticleDataEntryPtr entry_generic =
             _genericPythiaGen->particleData.particleDataEntryPtr( PDGCode );
-        Pythia8::ParticleDataEntry* entry_alias =
+        ParticleDataEntryPtr entry_alias =
             _aliasPythiaGen->particleData.particleDataEntryPtr( PDGCode );
 
         // Check that the PDG code is not zero/null and exclude other
--- a/EvtGenBase/EvtMatrix.hh.orig	2021-04-13 23:20:29.588804900 +0200
+++ b/EvtGenBase/EvtMatrix.hh	2021-04-13 23:20:36.663547400 +0200
@@ -23,6 +23,7 @@
 
 #include <sstream>
 #include <vector>
+#include <cmath>
 
 template <class T>
 class EvtMatrix {