GENERATOR_IS_MULTI_CONFIG: Use for multi-config checks in Tests

Tests/CMakeBuildTest.cmake.in

@@ -29,11 +29,10 @@ if(RESULT)
   message(FATAL_ERROR "Error running cmake --build")
 endif()
 
-# check for configuration types
-set(CMAKE_CONFIGURATION_TYPES @CMAKE_CONFIGURATION_TYPES@)
-# run the executable out of the Debug directory if there
-# are configuration types
-if(CMAKE_CONFIGURATION_TYPES)
+# run the executable out of the Debug directory if using a
+# multi-config generator
+set(_isMultiConfig @_isMultiConfig@)
+if(_isMultiConfig)
   set(RUN_TEST "@CMAKE_BUILD_TEST_BINARY_DIR@/Debug/@CMAKE_BUILD_TEST_EXE@")
 else()
   set(RUN_TEST "@CMAKE_BUILD_TEST_BINARY_DIR@/@CMAKE_BUILD_TEST_EXE@")

Tests/CMakeInstall.cmake

@@ -14,7 +14,18 @@ if(CMake_TEST_INSTALL)
   set(CMake_TEST_INSTALL_PREFIX ${CMake_BINARY_DIR}/Tests/CMakeInstall)
   set(CMAKE_INSTALL_PREFIX "${CMake_TEST_INSTALL_PREFIX}")
 
-  if(CMAKE_CONFIGURATION_TYPES)
+  # 3.9 or later provides a definitive answer to whether we are multi-config
+  # through a global property. Prior to 3.9, CMAKE_CONFIGURATION_TYPES being set
+  # is assumed to mean multi-config, but developers might modify it so it is
+  # technically not as reliable.
+  if(NOT CMAKE_VERSION VERSION_LESS 3.9)
+    get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+  elseif(CMAKE_CONFIGURATION_TYPES)
+    set(_isMultiConfig True)
+  else()
+    set(_isMultiConfig False)
+  endif()
+  if(_isMultiConfig)
     # There are multiple configurations.  Make sure the tested
     # configuration is the one that is installed.
     set(CMake_TEST_INSTALL_CONFIG --config $<CONFIGURATION>)

Tests/CMakeLists.txt

@@ -38,9 +38,21 @@ set(ENV{HOME} \"${TEST_HOME}\")
 ")
 endif()
 
+# 3.9 or later provides a definitive answer to whether we are multi-config
+# through a global property. Prior to 3.9, CMAKE_CONFIGURATION_TYPES being set
+# is assumed to mean multi-config, but developers might modify it so it is
+# technically not as reliable.
+if(NOT CMAKE_VERSION VERSION_LESS 3.9)
+  get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+elseif(CMAKE_CONFIGURATION_TYPES)
+  set(_isMultiConfig True)
+else()
+  set(_isMultiConfig False)
+endif()
+
 # Choose a default configuration for CTest tests.
 set(CTestTest_CONFIG Debug)
-if(NOT CMAKE_CONFIGURATION_TYPES AND CMAKE_BUILD_TYPE)
+if(NOT _isMultiConfig AND CMAKE_BUILD_TYPE)
   set(CTestTest_CONFIG ${CMAKE_BUILD_TYPE})
 endif()
 
@@ -3190,7 +3202,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
           OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE _result
           )
         if(_result EQUAL 0)
-          if(CMAKE_CONFIGURATION_TYPES)
+          if(_isMultiConfig)
             set (JAVAH_LIBRARY_PATH ${CMake_BINARY_DIR}/Tests/JavaJavah/$<CONFIGURATION>)
           else()
             set (JAVAH_LIBRARY_PATH ${CMake_BINARY_DIR}/Tests/JavaJavah)

Tests/CMakeOnly/SelectLibraryConfigurations/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.9)
 
 project(SelectLibraryConfigurations NONE)
 
@@ -15,7 +15,8 @@ macro(check_slc basename expect)
   endif ()
 endmacro(check_slc)
 
-if (NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if (NOT _isMultiConfig AND NOT CMAKE_BUILD_TYPE)
   set(NOTYPE_RELONLY_LIBRARY_RELEASE "opt")
   check_slc(NOTYPE_RELONLY "opt")
 

Tests/CTestConfig/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.9)
 project(CTestConfig)
 
 include(CTest)
@@ -8,32 +8,41 @@ include(CTest)
 # 'ctest -S script.cmake' call.
 #
 # In either case, we expect CMAKE_BUILD_TYPE to be defined for single-configuration
-# build trees and not defined for multi-configuration build trees.
+# build trees and not defined for multi-configuration build trees. The value of
+# CMAKE_CONFIGURATION_TYPES should not be relied upon to determine whether we
+# are using a multi-config generator or not, the GENERATOR_IS_MULTI_CONFIG
+# global property is the canonical way to do that as of CMake 3.9.
 #
-if(CMAKE_CONFIGURATION_TYPES)
-  # multi-configuration: expect not defined, error if defined
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
+  if(NOT DEFINED CMAKE_CONFIGURATION_TYPES OR CMAKE_CONFIGURATION_TYPES STREQUAL "")
+    message(FATAL_ERROR "CMAKE_CONFIGURATION_TYPES is not defined or is empty "
+        "(but must be defined and non-empty for a multi-configuration generator)")
+  endif()
   if(DEFINED CMAKE_BUILD_TYPE AND NOT CMAKE_BUILD_TYPE STREQUAL "")
-    message(FATAL_ERROR "CMAKE_CONFIGURATION_TYPES='${CMAKE_CONFIGURATION_TYPES}' CMAKE_BUILD_TYPE='${CMAKE_BUILD_TYPE}' is defined and non-empty (but should not be for a multi-configuration generator)")
+    message(FATAL_ERROR "CMAKE_BUILD_TYPE='${CMAKE_BUILD_TYPE}' is defined and non-empty "
+        "(but should not be for a multi-configuration generator)")
   endif()
+  set(_configs ${CMAKE_CONFIGURATION_TYPES})
 else()
-  # single-configuration: expect defined, error if not defined
+  # Populating CMAKE_CONFIGURATION_TYPES even for single config generators is
+  # common enough for user projects that we don't want to consider it an error.
+  # We just need CMAKE_BUILD_TYPE to be set and ignore CMAKE_CONFIGURATION_TYPES.
   if(NOT DEFINED CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "")
-    message(FATAL_ERROR "CMAKE_BUILD_TYPE is not defined or is empty (but should be defined and non-empty for a single-configuration generator)")
+    message(FATAL_ERROR "CMAKE_BUILD_TYPE is not defined or is empty "
+        "(but should be defined and non-empty for a single-configuration generator)")
   endif()
-endif()
-
-
-if(DEFINED CMAKE_BUILD_TYPE AND NOT CMAKE_BUILD_TYPE STREQUAL "")
   add_definitions(-DCMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
+  set(_configs ${CMAKE_BUILD_TYPE})
 endif()
 
 add_executable(ctc CTestConfig.cxx)
 
 
-foreach(cfg ${CMAKE_CONFIGURATION_TYPES} ${CMAKE_BUILD_TYPE})
+foreach(cfg ${_configs})
   add_test(NAME ctc-${cfg} CONFIGURATIONS ${cfg} COMMAND ctc --config $<CONFIGURATION>)
 
-  if(CMAKE_CONFIGURATION_TYPES)
+  if(_isMultiConfig)
     set_property(TEST ctc-${cfg}
       PROPERTY PASS_REGULAR_EXPRESSION "CMAKE_INTDIR is ${cfg}")
     set_property(TEST ctc-${cfg}

Tests/CTestConfig/dashboard.cmake.in

@@ -1,4 +1,4 @@
-set(CMAKE_CONFIGURATION_TYPES "@CMAKE_CONFIGURATION_TYPES@")
+set(_isMultiConfig "@_isMultiConfig@")
 set(CTEST_SOURCE_DIRECTORY "@CMake_SOURCE_DIR@/Tests/CTestConfig")
 set(CTEST_BINARY_DIRECTORY "@CMake_BINARY_DIR@/Tests/CTestConfig/@cfg@-dashboard")
 
@@ -11,7 +11,7 @@ message("CMAKE_COMMAND='${CMAKE_COMMAND}'")
 message("CMAKE_CTEST_COMMAND='${CMAKE_CTEST_COMMAND}'")
 
 set(arg "")
-if(NOT CMAKE_CONFIGURATION_TYPES)
+if(NOT _isMultiConfig)
   set(arg "-DCMAKE_BUILD_TYPE:STRING=@cfg@")
 endif()
 

Tests/CustomCommandByproducts/CMakeLists.txt

@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.9)
+cmake_policy(SET CMP0058 OLD)
 project(CustomCommandByproducts C)
 
 # Generate a byproduct in a rule that runs in the target consuming it.
@@ -81,7 +82,8 @@ add_custom_command(OUTPUT timestamp8.txt
 
 # Generate the library file of an imported target as a byproduct
 # of an external project.
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(cfg /${CMAKE_CFG_INTDIR})
 else()
   set(cfg)
@@ -105,7 +107,7 @@ add_dependencies(ExternalLibrary ExternalTarget)
 # Generate the library file of an imported target as a byproduct
 # of an external project. The byproduct uses <BINARY_DIR> that is substituted
 # by the real binary path
-if(CMAKE_CONFIGURATION_TYPES)
+if(_isMultiConfig)
   set(cfg /${CMAKE_CFG_INTDIR})
 else()
   set(cfg)

Tests/ExportImport/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.7.20090711)
+cmake_minimum_required (VERSION 3.9)
 project(ExportImport C CXX)
 if(NOT DEFINED CMake_TEST_NESTED_MAKE_PROGRAM AND NOT CMAKE_GENERATOR MATCHES "Visual Studio")
   set(CMake_TEST_NESTED_MAKE_PROGRAM "${CMAKE_MAKE_PROGRAM}")
@@ -15,7 +15,8 @@ set_property(
   PROPERTY SYMBOLIC 1
   )
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(NESTED_CONFIG_TYPE -C "${CMAKE_CFG_INTDIR}")
 else()
   if(CMAKE_BUILD_TYPE)

Tests/FortranModules/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.1)
+cmake_minimum_required (VERSION 3.9)
 project(FortranModules Fortran)
 
 if(NOT DEFINED CMake_TEST_NESTED_MAKE_PROGRAM AND NOT CMAKE_GENERATOR MATCHES "Visual Studio")
@@ -56,7 +56,8 @@ add_executable(test_non_pp_include test_non_pp_include_main.f90)
 
 # Build the external project separately using a custom target.
 # Make sure it uses the same build configuration as this test.
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(External_CONFIG_TYPE -C "${CMAKE_CFG_INTDIR}")
   set(External_BUILD_TYPE)
 else()

Tests/JavaExportImport/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.5)
+cmake_minimum_required (VERSION 3.9)
 project(JavaExportImport)
 if(NOT DEFINED CMake_TEST_NESTED_MAKE_PROGRAM AND NOT CMAKE_GENERATOR MATCHES "Visual Studio")
   set(CMake_TEST_NESTED_MAKE_PROGRAM "${CMAKE_MAKE_PROGRAM}")
@@ -17,7 +17,8 @@ set_property(
   PROPERTY SYMBOLIC 1
   )
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(NESTED_CONFIG_TYPE -C "${CMAKE_CFG_INTDIR}")
 else()
   if(CMAKE_BUILD_TYPE)

Tests/MacRuntimePath/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8)
+cmake_minimum_required (VERSION 3.9)
 project(MacRuntimePath)
 if(NOT DEFINED CMake_TEST_NESTED_MAKE_PROGRAM AND NOT CMAKE_GENERATOR MATCHES "Visual Studio")
   set(CMake_TEST_NESTED_MAKE_PROGRAM "${CMAKE_MAKE_PROGRAM}")
@@ -18,7 +18,8 @@ set_property(
 configure_file(${MacRuntimePath_SOURCE_DIR}/InitialCache.cmake.in
                ${MacRuntimePath_BINARY_DIR}/InitialCache.cmake @ONLY)
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(NESTED_CONFIG_TYPE -C "${CMAKE_CFG_INTDIR}")
 else()
   if(CMAKE_BUILD_TYPE)

Tests/MissingInstall/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8.12)
+cmake_minimum_required (VERSION 3.9)
 project(TestMissingInstall)
 
 set(CMAKE_SKIP_INSTALL_RULES ON)
@@ -8,11 +8,7 @@ set(CMAKE_SKIP_INSTALL_RULES ON)
 set(CMAKE_SKIP_INSTALL_ALL_DEPENDENCY 1)
 set(CMAKE_SKIP_PACKAGE_ALL_DEPENDENCY 1)
 
-if(CMAKE_CONFIGURATION_TYPES)
-  set(MULTI_CONFIG ON)
-else()
-  set(MULTI_CONFIG OFF)
-endif()
+get_property(MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
 
 add_executable(mybin mybin.cpp)
 install(TARGETS mybin RUNTIME DESTINATION bin)

Tests/OutDir/CMakeLists.txt

@@ -1,7 +1,8 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.9)
 project(OutDir C)
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   foreach(config ${CMAKE_CONFIGURATION_TYPES})
     string(TOUPPER "${config}" CONFIG)
     list(APPEND configs "${CONFIG}")

Tests/PrecompiledHeader/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.9)
 project(PrecompiledHeader C)
 
 # Make sure the proper compiler is in use.
@@ -7,7 +7,8 @@ if(NOT MSVC AND NOT CMAKE_C_COMPILER_ID STREQUAL "Intel")
 endif()
 
 # Compute a custom name for the precompiled header.
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(PCH_DIR "${CMAKE_CURRENT_BINARY_DIR}/PCH/${CMAKE_CFG_INTDIR}")
   foreach(cfg ${CMAKE_CONFIGURATION_TYPES})
     file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/PCH/${cfg})

Tests/Qt4Deploy/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.9)
 
 project(Qt4Deploy)
 set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_BINARY_DIR}/install)
@@ -10,7 +10,8 @@ add_executable(testdeploy MACOSX_BUNDLE testdeploy.cpp)
 target_link_libraries(testdeploy ${QT_LIBRARIES})
 set_target_properties(testdeploy PROPERTIES INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}")
 
-if(CMAKE_CONFIGURATION_TYPES AND QT_QTCORE_LIBRARY_RELEASE AND QT_QTCORE_LIBRARY_DEBUG)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig AND QT_QTCORE_LIBRARY_RELEASE AND QT_QTCORE_LIBRARY_DEBUG)
   # note: installing debug Qt libraries from a Qt installation configured with
   # -debug-and-release not yet supported (very low priority).
   install(CODE "
@@ -58,7 +59,7 @@ if(QT_QSQLITE_PLUGIN_DEBUG OR QT_QSQLITE_PLUGIN_RELEASE)
   endif()
 
   # custom target to install and test the installation at build time
-  if(CMAKE_CONFIGURATION_TYPES)
+  if(_isMultiConfig)
     set(install_config "-DCMAKE_INSTALL_CONFIG_NAME=${CMAKE_CFG_INTDIR}")
   endif()
 

Tests/QtAutogen/Complex/CMakeLists.txt

@@ -36,7 +36,8 @@ add_custom_command(
   DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/myotherinterface.h.in"
 )
 
-if (NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_GENERATOR STREQUAL Ninja)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig AND NOT CMAKE_GENERATOR STREQUAL Ninja)
   set(debug_srcs "$<$<CONFIG:Debug>:debug_class.cpp>" $<$<CONFIG:Debug>:debug_resource.qrc>)
   set_property(DIRECTORY APPEND PROPERTY COMPILE_DEFINITIONS $<$<CONFIG:Debug>:TEST_DEBUG_CLASS>)
 endif()

Tests/QtAutogen/TestMacros.cmake

@@ -1,6 +1,6 @@
 # Autogen build options
 set(Autogen_BUILD_OPTIONS "-DQT_TEST_VERSION=${QT_TEST_VERSION}")
-if(NOT CMAKE_CONFIGURATION_TYPES)
+if(NOT _isMultiConfig)   # Set in Tests/CMakeLists.txt
   list(APPEND Autogen_BUILD_OPTIONS "-DCMAKE_BUILD_TYPE=$<CONFIGURATION>")
 endif()
 list(APPEND Autogen_BUILD_OPTIONS

Tests/QtAutogen/UicInterface/CMakeLists.txt

@@ -35,8 +35,8 @@ set_property(TARGET KI18n APPEND PROPERTY
 
 # END upstream
 
-get_property(_GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
-if(_GENERATOR_IS_MULTI_CONFIG)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
 set(INC_DIR "include_$<CONFIG>" )
 else()
 set(INC_DIR "include" )

Tests/RunCMake/AutoExportDll/RunCMakeTest.cmake

@@ -12,7 +12,7 @@ if("${RunCMake_GENERATOR}" MATCHES "Watcom WMake|Borland Makefiles")
 endif()
 # we build debug so the say.exe will be found in Debug/say.exe for
 # Visual Studio generators
-if("${RunCMake_GENERATOR}" MATCHES "Visual Studio|Xcode")
+if(RunCMake_GENERATOR_IS_MULTI_CONFIG)
   set(INTDIR "Debug/")
 endif()
 # build AutoExport

Tests/RunCMake/BuildDepends/RunCMakeTest.cmake

@@ -11,7 +11,7 @@ function(run_BuildDepends CASE)
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/${CASE}-build)
   set(RunCMake_TEST_NO_CLEAN 1)
-  if(RunCMake_GENERATOR MATCHES "Make|Ninja")
+  if(NOT RunCMake_GENERATOR_IS_MULTI_CONFIG)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif()
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")

Tests/RunCMake/CMP0060/CMP0060-Common.cmake

@@ -1,6 +1,7 @@
 # Always build in a predictable configuration.  For multi-config
 # generators we depend on RunCMakeTest.cmake to do this for us.
-if(NOT CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig)
   set(CMAKE_BUILD_TYPE Debug)
 endif()
 

Tests/RunCMake/CMP0060/CMP0060-WARN-ON-stderr.txt

@@ -12,5 +12,5 @@
   will ask the linker to search for these by library name.
 Call Stack \(most recent call first\):
   CMP0060-WARN-ON.cmake:[0-9]+ \(include\)
-  CMakeLists.txt:3 \(include\)
+  CMakeLists.txt:4 \(include\)
 This warning is for project developers.  Use -Wno-dev to suppress it.$

Tests/RunCMake/CMP0060/CMakeLists.txt

@@ -1,3 +1,4 @@
-cmake_minimum_required(VERSION 3.2)
+cmake_minimum_required(VERSION 3.9)
+cmake_policy(VERSION 3.2)
 project(${RunCMake_TEST} C)
 include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CMakeLists.txt

@@ -1,5 +1,8 @@
 # See adjacent README.rst for documentation of this test infrastructure.
 
+# Note that the _isMultiConfig variable is set in the parent directory's
+# CMakeLists.txt (slightly complex logic to support CMake versions before 3.9)
+
 macro(add_RunCMake_test test)
   set(TEST_ARGS ${ARGN})
   if ("${ARGV1}" STREQUAL "TEST_DIR")
@@ -14,6 +17,7 @@ macro(add_RunCMake_test test)
   endif()
   add_test(NAME RunCMake.${test} COMMAND ${CMAKE_CMAKE_COMMAND}
     -DCMAKE_MODULE_PATH=${CMAKE_CURRENT_SOURCE_DIR}
+    -DRunCMake_GENERATOR_IS_MULTI_CONFIG=${_isMultiConfig}
     -DRunCMake_GENERATOR=${CMAKE_GENERATOR}
     -DRunCMake_GENERATOR_INSTANCE=${CMAKE_GENERATOR_INSTANCE}
     -DRunCMake_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}
@@ -47,6 +51,7 @@ function(add_RunCMake_test_group test types)
       add_test(NAME RunCMake.${test}_${type} COMMAND ${CMAKE_CMAKE_COMMAND}
         -DTEST_TYPE=${type}
         -DCMAKE_MODULE_PATH=${CMAKE_CURRENT_SOURCE_DIR}
+        -DRunCMake_GENERATOR_IS_MULTI_CONFIG=${_isMultiConfig}
         -DRunCMake_GENERATOR=${CMAKE_GENERATOR}
         -DRunCMake_GENERATOR_INSTANCE=${CMAKE_GENERATOR_INSTANCE}
         -DRunCMake_GENERATOR_PLATFORM=${CMAKE_GENERATOR_PLATFORM}

Tests/RunCMake/ExternalProject/CMAKE_CACHE_ARGS.cmake

@@ -1,4 +1,5 @@
-if(NOT CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig)
   set(CMAKE_BUILD_TYPE Debug)
 endif()
 include(ExternalProject)

Tests/RunCMake/ExternalProject/CMAKE_CACHE_DEFAULT_ARGS.cmake

@@ -1,4 +1,5 @@
-if(NOT CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig)
   set(CMAKE_BUILD_TYPE Debug)
 endif()
 include(ExternalProject)

Tests/RunCMake/ExternalProject/CMAKE_CACHE_mix.cmake

@@ -1,4 +1,5 @@
-if(NOT CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig)
   set(CMAKE_BUILD_TYPE Debug)
 endif()
 include(ExternalProject)

Tests/RunCMake/ExternalProject/UsesTerminal.cmake

@@ -1,4 +1,5 @@
-if(NOT CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(NOT _isMultiConfig)
   set(CMAKE_BUILD_TYPE Debug)
 endif()
 include(ExternalProject)

Tests/RunCMake/File_Generate/RunCMakeTest.cmake

@@ -5,7 +5,7 @@ run_cmake(CMP0070-OLD)
 run_cmake(CMP0070-WARN)
 
 run_cmake(CommandConflict)
-if("${RunCMake_GENERATOR}" MATCHES "Visual Studio|Xcode")
+if(RunCMake_GENERATOR_IS_MULTI_CONFIG)
   run_cmake(OutputConflict)
 endif()
 run_cmake(EmptyCondition1)

Tests/RunCMake/GenerateExportHeader/RunCMakeTest.cmake

@@ -4,7 +4,7 @@ function(run_GEH)
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/GEH-build)
   set(RunCMake_TEST_NO_CLEAN 1)
-  if(RunCMake_GENERATOR MATCHES "Make|Ninja")
+  if(NOT RunCMake_GENERATOR_IS_MULTI_CONFIG)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif()
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")

Tests/RunCMake/GeneratorExpression/ValidTarget-TARGET_PDB_FILE.cmake

@@ -3,7 +3,8 @@ enable_language(C)
 
 add_library(empty SHARED empty.c)
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   list(GET CMAKE_CONFIGURATION_TYPES 0 FIRST_CONFIG)
   set(GENERATE_CONDITION CONDITION $<CONFIG:${FIRST_CONFIG}>)
 endif()

Tests/RunCMake/GoogleTest/RunCMakeTest.cmake

@@ -4,7 +4,7 @@ function(run_GoogleTest)
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/GoogleTest-build)
   set(RunCMake_TEST_NO_CLEAN 1)
-  if(RunCMake_GENERATOR MATCHES "Make|Ninja")
+  if(NOT RunCMake_GENERATOR_IS_MULTI_CONFIG)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif()
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")

Tests/RunCMake/RuntimePath/RunCMakeTest.cmake

@@ -5,7 +5,7 @@ function(run_SymlinkImplicit)
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/SymlinkImplicit-build)
   set(RunCMake_TEST_NO_CLEAN 1)
-  if(RunCMake_GENERATOR MATCHES "Make|Ninja")
+  if(NOT RunCMake_GENERATOR_IS_MULTI_CONFIG)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif()
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")

Tests/RunCMake/get_property/RunCMakeTest.cmake

@@ -23,6 +23,10 @@ run_cmake(NoSource)
 run_cmake(NoProperty)
 run_cmake(NoCache)
 
+# Since we are testing the GENERATOR_IS_MULTI_CONFIG property itself,
+# don't rely on RunCMake_GENERATOR_IS_MULTI_CONFIG being set correctly
+# and instead explicitly check for a match against those generators we
+# expect to be multi-config
 if(RunCMake_GENERATOR MATCHES "Visual Studio|Xcode")
   run_cmake(IsMultiConfig)
 else()

Tests/RunCMake/test_include_dirs/RunCMakeTest.cmake

@@ -4,7 +4,7 @@ function(run_TID)
   # Use a single build tree for a few tests without cleaning.
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/TID-build)
   set(RunCMake_TEST_NO_CLEAN 1)
-  if(RunCMake_GENERATOR MATCHES "Make|Ninja")
+  if(NOT RunCMake_GENERATOR_IS_MULTI_CONFIG)
     set(RunCMake_TEST_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
   endif()
   file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")

Tests/SimpleInstall/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.9)
 project (TestSimpleInstall)
 set(CMAKE_VERBOSE_MAKEFILE 1)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY
@@ -307,7 +307,8 @@ else()
         INSTALL_NAME_DIR @executable_path/../lib)
 endif()
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(SI_CONFIG --config $<CONFIGURATION>)
 else()
   set(SI_CONFIG)

Tests/SimpleInstallS2/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.6)
+cmake_minimum_required (VERSION 3.9)
 project (TestSimpleInstall)
 set(CMAKE_VERBOSE_MAKEFILE 1)
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY
@@ -307,7 +307,8 @@ else()
         INSTALL_NAME_DIR @executable_path/../lib)
 endif()
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(SI_CONFIG --config $<CONFIGURATION>)
 else()
   set(SI_CONFIG)

Tests/StagingPrefix/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.9)
 project(StagingPrefix)
 
 # Wipe out the install tree
@@ -17,7 +17,8 @@ set_property(
   PROPERTY SYMBOLIC 1
   )
 
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   set(NESTED_CONFIG_TYPE -C "${CMAKE_CFG_INTDIR}")
 else()
   if(CMAKE_BUILD_TYPE)

Tests/VSGNUFortran/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.9)
 project(VSGNUFortran)
 
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin")
@@ -9,7 +9,8 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib")
 # because gmake build of fortran will not be in a config
 # directory, and for easier testing we want the exe and .dll
 # to be in the same directory.
-if(CMAKE_CONFIGURATION_TYPES)
+get_property(_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+if(_isMultiConfig)
   foreach(config ${CMAKE_CONFIGURATION_TYPES})
     string(TOUPPER "${config}" config)
     set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_${config}