diff --git a/epochX/cudacpp/ee_mumu.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/ee_mumu.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/ee_mumu.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/ee_mumu.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/ee_mumu.mad/test/cudacpp_test.mk b/epochX/cudacpp/ee_mumu.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/ee_mumu.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/ee_mumu.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/ee_mumu.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/ee_mumu.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/ee_mumu.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/ee_mumu.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/ee_mumu.sa/test/cudacpp_test.mk b/epochX/cudacpp/ee_mumu.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/ee_mumu.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/ee_mumu.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_tt.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_tt.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_tt.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_tt.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_tt.sa/test/cudacpp_test.mk b/epochX/cudacpp/gg_tt.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_tt.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_tt.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_tt01g.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_tt01g.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_tt01g.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_tt01g.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_tt01g.mad/test/cudacpp_test.mk b/epochX/cudacpp/gg_tt01g.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_tt01g.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_tt01g.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttg.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttg.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttg.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttg.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttg.mad/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttg.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttg.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttg.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttg.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttg.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttg.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttg.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttg.sa/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttg.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttg.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttg.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttgg.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttgg.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttgg.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttgg.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttgg.mad/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttgg.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttgg.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttgg.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttgg.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttgg.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttgg.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttgg.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttgg.sa/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttgg.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttgg.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttgg.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttggg.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttggg.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttggg.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttggg.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttggg.mad/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttggg.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttggg.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttggg.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gg_ttggg.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_ttggg.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gg_ttggg.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_ttggg.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gg_ttggg.sa/test/cudacpp_test.mk b/epochX/cudacpp/gg_ttggg.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gg_ttggg.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gg_ttggg.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gq_ttq.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gq_ttq.mad/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gq_ttq.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gq_ttq.mad/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gq_ttq.mad/test/cudacpp_test.mk b/epochX/cudacpp/gq_ttq.mad/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gq_ttq.mad/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gq_ttq.mad/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/gq_ttq.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/gq_ttq.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/gq_ttq.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gq_ttq.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/gq_ttq.sa/test/cudacpp_test.mk b/epochX/cudacpp/gq_ttq.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/gq_ttq.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/gq_ttq.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-
diff --git a/epochX/cudacpp/heft_gg_h.sa/SubProcesses/cudacpp.mk b/epochX/cudacpp/heft_gg_h.sa/SubProcesses/cudacpp.mk
index 88db44c517..43cee0977e 100644
--- a/epochX/cudacpp/heft_gg_h.sa/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/heft_gg_h.sa/SubProcesses/cudacpp.mk
@@ -41,15 +41,17 @@ INCFLAGS += -I../../src
 
 # Compiler-specific googletest build directory (#125 and #738)
 ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
+override CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
 else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
+override CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
 else
-CXXNAME = unknown
+override CXXNAME = unknown
 endif
 ###$(info CXXNAME=$(CXXNAME))
+override CXXNAMESUFFIX = _$(CXXNAME)
+export CXXNAMESUFFIX
 
 # Dependency on test directory
 # Within the madgraph4gpu git repo: by default use a common gtest installation in <topdir>/test (optionally use an external or local gtest)
@@ -62,10 +64,10 @@ ifneq ($(wildcard $(GTEST_ROOT)),)
 TESTDIR =
 else ifneq ($(LOCALGTEST),)
 TESTDIR=$(TESTDIRLOCAL)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else ifneq ($(wildcard ../../../../../epochX/cudacpp/CODEGEN),)
 TESTDIR = $(TESTDIRCOMMON)
-GTEST_ROOT = $(TESTDIR)/googletest/install_$(CXXNAME)
+GTEST_ROOT = $(TESTDIR)/googletest/install$(CXXNAMESUFFIX)
 else
 TESTDIR =
 endif
diff --git a/epochX/cudacpp/heft_gg_h.sa/test/cudacpp_test.mk b/epochX/cudacpp/heft_gg_h.sa/test/cudacpp_test.mk
index 19b75f7d95..39ed957600 100644
--- a/epochX/cudacpp/heft_gg_h.sa/test/cudacpp_test.mk
+++ b/epochX/cudacpp/heft_gg_h.sa/test/cudacpp_test.mk
@@ -6,22 +6,13 @@
 THISDIR = $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
 
 # Compiler-specific googletest build directory (#125 and #738)
-# Note: AR, CXX and FC are implicitly defined if not set externally
-# See https://www.gnu.org/software/make/manual/html_node/Implicit-Variables.html
-ifneq ($(shell $(CXX) --version | grep '^Intel(R) oneAPI DPC++/C++ Compiler'),)
-CXXNAME = icpx$(shell $(CXX) --version | head -1 | cut -d' ' -f5)
-else ifneq ($(shell $(CXX) --version | egrep '^clang'),)
-CXXNAME = clang$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else ifneq ($(shell $(CXX) --version | grep '^g++ (GCC)'),)
-CXXNAME = gcc$(shell $(CXX) --version | head -1 | cut -d' ' -f3)
-else
-CXXNAME = unknown
-endif
-$(info CXXNAME=$(CXXNAME))
-BUILDDIR = build_$(CXXNAME)
-$(info BUILDDIR=$(BUILDDIR))
-INSTALLDIR = install_$(CXXNAME)
-$(info INSTALLDIR=$(INSTALLDIR))
+# In epochX, CXXNAMESUFFIX=_$(CXXNAME) is exported from cudacpp.mk
+# In epoch1/epoch2, CXXNAMESUFFIX is undefined
+$(info CXXNAMESUFFIX=$(CXXNAMESUFFIX))
+BUILDDIR = build$(CXXNAMESUFFIX)
+###$(info BUILDDIR=$(BUILDDIR))
+INSTALLDIR = install$(CXXNAMESUFFIX)
+###$(info INSTALLDIR=$(INSTALLDIR))
 
 CXXFLAGS += -Igoogletest/googletest/include/ -std=c++11
 
@@ -47,4 +38,3 @@ googletest/$(INSTALLDIR)/lib64/libgtest.a: googletest/$(BUILDDIR)/lib/libgtest.a
 
 clean:
 	rm -rf googletest
-