[roottest] Move from ROOT_xxx_FOUND to ROOT's native build options.

The build options called ROOT_xxx_FOUND originate from
find_package(ROOT). Given that roottest is built as part of the ROOT
build, one can now directly use the build option flags from ROOT's
CMake.
This will allow to remove the find_package(ROOT) step in the future.

This change enabled the following test, which was disabled because
ROOT_mathmore_FOUND wasn't set correctly:
+gtest-roofit-roofit-vectorisedPDFs-testLegendre

Author: hageboeck

roofit/roofit/test/vectorisedPDFs/CMakeLists.txt

@@ -48,7 +48,7 @@ ROOT_ADD_GTEST(testCBShape testCBShape.cxx
               LIBRARIES VectorisedPDFTests)
 ROOT_ADD_GTEST(testGamma testGamma.cxx
               LIBRARIES VectorisedPDFTests)
-if(ROOT_mathmore_FOUND)
+if(mathmore)
   ROOT_ADD_GTEST(testLegendre testLegendre.cxx
                 LIBRARIES VectorisedPDFTests ROOT::RooFitMore)
 endif()

roottest/CMakeLists.txt

@@ -119,7 +119,7 @@ set(CMAKE_ROOTTEST_DICT ON)
 set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${ROOT_SOURCE_DIR}/roottest/cmake/modules")
 
 #---Set flag for PyROOT tests that are expected to fail
-if(ROOT_pyroot_FOUND)
+if(pyroot)
   set(PYTESTS_WILLFAIL WILLFAIL)
 endif()
 

roottest/cling/functionTemplate/CMakeLists.txt

@@ -10,7 +10,7 @@ ROOTTEST_ADD_TEST(runreferenceuse
                   DEPENDS MyClassReferenceUse.C
                   LABELS roottest regression cling)
 
-if(ROOT_pyroot_FOUND)
+if(pyroot)
   ROOTTEST_ADD_TEST(testcint
                     MACRO testcint.py
                     PRECMD ${ROOT_root_CMD} -b -q -l -e .L\ t.h+

roottest/cling/parsing/ALICE-18972/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(ROOT_geom_FOUND)
+if(geom)
   ROOTTEST_GENERATE_REFLEX_DICTIONARY(ALICE_18972 mylib.h SELECTION mylib_sel.xml)
 
   ROOTTEST_ADD_TEST(ALICE_18972

roottest/cling/template/CMakeLists.txt

@@ -16,7 +16,7 @@ ROOTTEST_ADD_TEST(templateSingleton
                   FIXTURES_REQUIRED cling-template-Singleton-fixture
                   LABELS roottest regression cling)
 
-if(NOT ROOT_runtime_cxxmodules_FOUND)
+if(NOT runtime_cxxmodules)
   ROOTTEST_GENERATE_DICTIONARY(slaveDict        slave.h        LINKDEF slaveLinkDef.h)
 endif()
 ROOTTEST_GENERATE_DICTIONARY(masterDict       master.h       NO_CXXMODULE LINKDEF masterLinkDef.h)

roottest/cmake/modules/SearchInstalledSoftwareRoottest.cmake

@@ -6,7 +6,7 @@ if(NOT MSVC)
 endif()
 
 #---Check for MPI---------------------------------------------------------------
-if(ROOT_mpi_FOUND)
+if(mpi)
   message(STATUS "Looking for MPI")
   find_package(MPI)
   if(NOT MPI_FOUND)

roottest/python/CMakeLists.txt

@@ -1,10 +1,10 @@
-if(ROOT_pyroot_FOUND)
+if(pyroot)
 
-  if(ROOT_roofit_FOUND)
+  if(roofit)
     set(roofit True)
   else()
     set(roofit False)
-  endif(ROOT_roofit_FOUND)
+  endif(roofit)
 
   find_python_module(pytest OPTIONAL)
 

roottest/python/JsMVA/CMakeLists.txt

@@ -1,4 +1,4 @@
-#if (ROOT_pyroot_FOUND AND NOT ROOT_CLASSIC_BUILD) # Do not run with classic build
+#if (pyroot AND NOT ROOT_CLASSIC_BUILD) # Do not run with classic build
 
 #set(NBDIFFUTIL ${CMAKE_CURRENT_SOURCE_DIR}/nbdiff.py )
 

roottest/python/JupyROOT/CMakeLists.txt

@@ -2,7 +2,7 @@
 if(NOT MSVC OR win_broken_tests)
 
 # Do not run with classic build or if tests are vetoed
-if (ROOT_pyroot_FOUND AND NOT ROOT_CLASSIC_BUILD)
+if (pyroot AND NOT ROOT_CLASSIC_BUILD)
 
 set(MODULES_LOCATION ${ROOTSYS}/lib/JupyROOT/helpers)
 set(NBDIFFUTIL ${CMAKE_CURRENT_SOURCE_DIR}/nbdiff.py )
@@ -38,7 +38,7 @@ foreach(NOTEBOOK ${NOTEBOOKS})
                     PYTHON_DEPS jupyter)
 endforeach()
 
-if(ROOT_imt_FOUND)
+if(imt)
   # No need to compare output here, just check it runs with no error
   set(IMT_NB Cpp_IMT_Canvas.ipynb)
   get_filename_component(NOTEBOOKBASE ${IMT_NB} NAME_WE)

roottest/python/basic/CMakeLists.txt

@@ -1,4 +1,4 @@
-if(ROOT_pyroot_FOUND)
+if(pyroot)
   ROOTTEST_ADD_TEST(basic
                     MACRO PyROOT_basictests.py
                     COPY_TO_BUILDDIR ArgumentPassingCompiled.C ReturnValues.C SimpleClass.C ArgumentPassingInterpreted.C