gaudi: add a patch for missing includes for @37:38 (#46365)

var/spack/repos/builtin/packages/gaudi/includes.patch

@@ -0,0 +1,38 @@
+diff --git a/GaudiHive/src/AvalancheSchedulerSvc.cpp b/GaudiHive/src/AvalancheSchedulerSvc.cpp
+index 7f49e6f75..76601bed8 100644
+--- a/GaudiHive/src/AvalancheSchedulerSvc.cpp
++++ b/GaudiHive/src/AvalancheSchedulerSvc.cpp
+@@ -23,6 +23,7 @@
+ 
+ // C++
+ #include <algorithm>
++#include <fstream>
+ #include <map>
+ #include <queue>
+ #include <sstream>
+diff --git a/GaudiHive/src/PRGraph/Visitors/Rankers.cpp b/GaudiHive/src/PRGraph/Visitors/Rankers.cpp
+index 33f733633..e4d33080f 100644
+--- a/GaudiHive/src/PRGraph/Visitors/Rankers.cpp
++++ b/GaudiHive/src/PRGraph/Visitors/Rankers.cpp
+@@ -10,6 +10,8 @@
+ \***********************************************************************************/
+ #include "Rankers.h"
+ 
++#include <fstream>
++
+ namespace concurrency {
+ 
+   //--------------------------------------------------------------------------
+diff --git a/GaudiHive/src/PrecedenceSvc.cpp b/GaudiHive/src/PrecedenceSvc.cpp
+index ac4a7b7d9..1ff1e3f9e 100644
+--- a/GaudiHive/src/PrecedenceSvc.cpp
++++ b/GaudiHive/src/PrecedenceSvc.cpp
+@@ -17,6 +17,8 @@
+ #include <Gaudi/Algorithm.h>
+ #include <Gaudi/Sequence.h>
+ 
++#include <fstream>
++
+ #define ON_DEBUG if ( msgLevel( MSG::DEBUG ) )
+ #define ON_VERBOSE if ( msgLevel( MSG::VERBOSE ) )
+ 

var/spack/repos/builtin/packages/gaudi/package.py

@@ -73,6 +73,9 @@ class Gaudi(CMakePackage):
         when="@:38.1",
     )
 
+    # add a few missing includes (c++20?)
+    patch("includes.patch", when="@37:38")
+
     # These dependencies are needed for a minimal Gaudi build
     depends_on("aida")
     # The boost components that are required for Gaudi