From 3c6f3c3e7b025b52d29d663e1e79314dd2a07c55 Mon Sep 17 00:00:00 2001
From: Nils Leif Fischer <nils.fischer@aei.mpg.de>
Date: Fri, 14 Jan 2022 11:25:36 +0100
Subject: [PATCH] Add standard CMake `BUILD_TESTING` option

---
 CMakeLists.txt                                 | 18 +++++++++++-------
 cmake/SpectreSetupPythonPackage.cmake          |  4 +++-
 .../ReduceCceWorldtube/CMakeLists.txt          |  4 +++-
 3 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7646195de7..99716332a6e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -97,7 +97,6 @@ include(SetupLIBXSMM)
 
 include(SetupBlaze)
 include(SetupBrigand)
-include(SetupCatch)
 include(SetupGoogleBenchmark)
 include(SetupGsl)
 include(SetupHdf5)
@@ -132,11 +131,14 @@ include(SetupSphinx)
 include(CodeCoverageDetection)
 include(SpectreAddLibraries)
 
-enable_testing(true)
-include(SetupPypp)
-include(SpectreAddTestLibs)
-include(SpectreAddCatchTests)
-include(AddInputFileTests)
+include(CTest)
+if(BUILD_TESTING)
+  include(SetupCatch)
+  include(SetupPypp)
+  include(SpectreAddTestLibs)
+  include(SpectreAddCatchTests)
+  include(AddInputFileTests)
+endif()
 
 include_directories(${CMAKE_SOURCE_DIR}/external)
 include_directories(${CMAKE_SOURCE_DIR}/src)
@@ -149,7 +151,9 @@ spectre_include_directories(${CMAKE_BINARY_DIR}/src/Parallel)
 
 add_subdirectory(external)
 add_subdirectory(src)
-add_subdirectory(tests)
+if(BUILD_TESTING)
+  add_subdirectory(tests)
+endif()
 
 include(PrintUsefulCMakeInfo)
 
diff --git a/cmake/SpectreSetupPythonPackage.cmake b/cmake/SpectreSetupPythonPackage.cmake
index 2b2466e6337..c81a9256f59 100644
--- a/cmake/SpectreSetupPythonPackage.cmake
+++ b/cmake/SpectreSetupPythonPackage.cmake
@@ -187,7 +187,9 @@ function(SPECTRE_PYTHON_ADD_MODULE MODULE_NAME)
       LINK_FLAGS "${PY_LIB_LINK_FLAGS}"
       )
     set(SPECTRE_PYTHON_MODULE_IMPORT "from ._${ARG_LIBRARY_NAME} import *")
-    add_dependencies(test-executables ${ARG_LIBRARY_NAME})
+    if(BUILD_TESTING)
+      add_dependencies(test-executables ${ARG_LIBRARY_NAME})
+    endif()
     add_dependencies(all-pybindings ${ARG_LIBRARY_NAME})
   endif(BUILD_PYTHON_BINDINGS AND NOT "${ARG_SOURCES}" STREQUAL "")
 
diff --git a/src/Executables/ReduceCceWorldtube/CMakeLists.txt b/src/Executables/ReduceCceWorldtube/CMakeLists.txt
index 3224b71c7e6..eca8f597b12 100644
--- a/src/Executables/ReduceCceWorldtube/CMakeLists.txt
+++ b/src/Executables/ReduceCceWorldtube/CMakeLists.txt
@@ -26,4 +26,6 @@ set_target_properties(
   PROPERTIES LINK_FLAGS "-nomain-module -nomain"
   )
 
-add_dependencies(test-executables ${EXECUTABLE})
+if(BUILD_TESTING)
+  add_dependencies(test-executables ${EXECUTABLE})
+endif()
-- 
2.34.1