fix CMake configuration types on multi-config generators

CMakeLists.txt

@@ -28,17 +28,22 @@ if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
 endif()
 
 # Setup valid strings for build type
-if (NOT CMAKE_CONFIGURATION_TYPES)
-    set(CMAKE_CONFIGURATION_TYPES "Debug;Release;RelWithDebInfo;MinSizeRel" CACHE STRING "Configs")
-endif()
+set(MIGRAPHX_CONFIGURATION_TYPES "Debug;Release;RelWithDebInfo;MinSizeRel")
 
 get_property(MIGRAPHX_GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
 # This has to be initialized before the project() command appears
 # Set the default of CMAKE_BUILD_TYPE to be release, unless user specifies with -D.  MSVC_IDE does not use CMAKE_BUILD_TYPE
 if(NOT MIGRAPHX_GENERATOR_IS_MULTI_CONFIG)
-    set(CMAKE_BUILD_TYPE Release CACHE STRING
-        "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel.")
-    set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CMAKE_CONFIGURATION_TYPES})
+    if (NOT CMAKE_BUILD_TYPE)
+        set(CMAKE_BUILD_TYPE Release CACHE STRING
+            "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel.")
+        set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${MIGRAPHX_CONFIGURATION_TYPES})
+    endif()
+else()
+    if (NOT CMAKE_CONFIGURATION_TYPES)
+        set(CMAKE_CONFIGURATION_TYPES ${MIGRAPHX_CONFIGURATION_TYPES} CACHE STRING
+                "Available build types (configurations) on multi-config generators")
+    endif()
 endif()
 
 if(NOT WIN32)