From 46bbad3dff6985547e8ef1d008b6843f98e2ce16 Mon Sep 17 00:00:00 2001
From: Shahzad Malik Muzaffar <shahzad.malik.muzaffar@cern.ch>
Date: Wed, 31 Jul 2024 14:51:41 +0200
Subject: [PATCH 1/4] Compile GPU.cc files only if cuda is available

---
 CondFormats/EcalObjects/BuildFile.xml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CondFormats/EcalObjects/BuildFile.xml b/CondFormats/EcalObjects/BuildFile.xml
index 3403f3817697c..61c5c69126a5e 100644
--- a/CondFormats/EcalObjects/BuildFile.xml
+++ b/CondFormats/EcalObjects/BuildFile.xml
@@ -11,7 +11,11 @@
 <use name="boost_serialization"/>
 <use name="rootmath"/>
 <use name="clhep"/>
-<use name="cuda"/>
+<iftool name="cuda">
+  <use name="cuda"/>
+<else/>
+  <flags SKIP_FILES="%GPU.cc"/>
+</iftool>
 <use name="HeterogeneousCore/AlpakaInterface"/>
 <flags ALPAKA_BACKENDS="!serial"/>
 <export>

From 38842611ead06ac86ad687020cea8f4d49d6e21d Mon Sep 17 00:00:00 2001
From: Shahzad Malik Muzaffar <shahzad.malik.muzaffar@cern.ch>
Date: Wed, 31 Jul 2024 14:52:13 +0200
Subject: [PATCH 2/4] drop HeterogeneousHGCalHEFCellPositionsConditions.cc if
 cuda is not available

---
 CondFormats/HGCalObjects/BuildFile.xml | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/CondFormats/HGCalObjects/BuildFile.xml b/CondFormats/HGCalObjects/BuildFile.xml
index 6f6a7def437f1..db1814eeed0ef 100644
--- a/CondFormats/HGCalObjects/BuildFile.xml
+++ b/CondFormats/HGCalObjects/BuildFile.xml
@@ -7,8 +7,12 @@
 <use name="FWCore/MessageLogger"/>
 <use name="FWCore/Utilities"/>
 <use name="HeterogeneousCore/AlpakaInterface"/>
-<use name="HeterogeneousCore/CUDACore"/>
+<iftool name="cuda">
+  <use name="HeterogeneousCore/CUDACore"/>
+<else/>
+  <flags SKIP_FILES="T_EventSetup_HeterogeneousHGCalHEFCellPositionsConditions.cc"/>
+</iftool>
 <flags ALPAKA_BACKENDS="1"/>
 <export>
   <lib name="1"/>
-</export>
\ No newline at end of file
+</export>

From a8f988ee989044df81651264978ecbaf68a884e2 Mon Sep 17 00:00:00 2001
From: Shahzad Malik Muzaffar <shahzad.malik.muzaffar@cern.ch>
Date: Wed, 31 Jul 2024 14:52:42 +0200
Subject: [PATCH 3/4] Compile GPU.cc files only if cuda is available

---
 CondFormats/HcalObjects/BuildFile.xml | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/CondFormats/HcalObjects/BuildFile.xml b/CondFormats/HcalObjects/BuildFile.xml
index 86637f594c35b..34f054dc82699 100644
--- a/CondFormats/HcalObjects/BuildFile.xml
+++ b/CondFormats/HcalObjects/BuildFile.xml
@@ -10,8 +10,12 @@
 <use name="FWCore/MessageLogger"/>
 <use name="FWCore/Utilities"/>
 <use name="Geometry/CaloTopology"/>
-<use name="HeterogeneousCore/CUDACore"/>
-<use name="HeterogeneousCore/CUDAUtilities"/>
+<iftool name="cuda">
+  <use name="HeterogeneousCore/CUDACore"/>
+  <use name="HeterogeneousCore/CUDAUtilities"/>
+<else/>
+  <flags SKIP_FILES="%GPU.cc"/>
+</iftool>
 <use name="HeterogeneousCore/AlpakaCore"/>
 <use name="HeterogeneousCore/AlpakaInterface"/>
 <flags ALPAKA_BACKENDS="1"/>

From b8b76c84b439f27bdbcb709609f8e20a93fd1bed Mon Sep 17 00:00:00 2001
From: Shahzad Malik Muzaffar <shahzad.malik.muzaffar@cern.ch>
Date: Wed, 31 Jul 2024 14:58:58 +0200
Subject: [PATCH 4/4] cleanup geant4 and big simpulation plugin dependency

---
 BigProducts/Simulation/BuildFile.xml             | 1 -
 Validation/HGCalValidation/BuildFile.xml         | 1 -
 Validation/HGCalValidation/plugins/BuildFile.xml | 1 -
 Validation/HGCalValidation/test/BuildFile.xml    | 1 -
 4 files changed, 4 deletions(-)

diff --git a/BigProducts/Simulation/BuildFile.xml b/BigProducts/Simulation/BuildFile.xml
index a8eae0f766fe2..fef5a4b1bc75b 100644
--- a/BigProducts/Simulation/BuildFile.xml
+++ b/BigProducts/Simulation/BuildFile.xml
@@ -29,7 +29,6 @@
 <use name="Validation/EcalHits"/>
 <use name="Validation/Geometry"/>
 <use name="Validation/HcalHits"/>
-<use name="Validation/HGCalValidation"/>
 <use name="geant4static"/>
 <use name="g4hepemstatic"/>
 <flags DROP_DEP="geant4core"/>
diff --git a/Validation/HGCalValidation/BuildFile.xml b/Validation/HGCalValidation/BuildFile.xml
index b2857c10c1dd0..03f0b92c37e60 100644
--- a/Validation/HGCalValidation/BuildFile.xml
+++ b/Validation/HGCalValidation/BuildFile.xml
@@ -8,7 +8,6 @@
 <use name="SimDataFormats/CaloAnalysis"/>
 <use name="RecoLocalCalo/HGCalRecAlgos"/>
 <use name="RecoLocalCalo/HGCalRecProducers"/>
-<use name="geant4core"/>
 <use name="clhep"/>
 <use name="hepmc"/>
 <export>
diff --git a/Validation/HGCalValidation/plugins/BuildFile.xml b/Validation/HGCalValidation/plugins/BuildFile.xml
index d72fcee374276..3da590d8f09fc 100644
--- a/Validation/HGCalValidation/plugins/BuildFile.xml
+++ b/Validation/HGCalValidation/plugins/BuildFile.xml
@@ -26,7 +26,6 @@
 <use name="SimG4CMS/Calo"/>
 <use name="RecoLocalCalo/HGCalRecAlgos"/>
 <use name="Validation/HGCalValidation"/>
-<use name="geant4core"/>
 <use name="dd4hep"/>
 <use name="clhep"/>
 <use name="hepmc"/>
diff --git a/Validation/HGCalValidation/test/BuildFile.xml b/Validation/HGCalValidation/test/BuildFile.xml
index 03744337ed33d..f7daffbbf288c 100644
--- a/Validation/HGCalValidation/test/BuildFile.xml
+++ b/Validation/HGCalValidation/test/BuildFile.xml
@@ -9,7 +9,6 @@
 <use name="SimDataFormats/CaloTest"/>
 <use name="SimG4CMS/Calo"/>
 <use name="RecoLocalCalo/HGCalRecAlgos"/>
-<use name="geant4core"/>
 <use name="clhep"/>
 <use name="hepmc"/>
 <flags EDM_PLUGIN="1"/>