Some cmake fixes and updates (#1088)

Make doc/CMakeLists.txt standalone
Switch to use rocm-cmake modules for document generation
Add CONFIGURE_DEPENDS to file(GLOB) so it will update without an explicit cmake run
Add STRINGS property for build type to make it easier to switch build types with ccmake
Various fixes and improvements

CMakeLists.txt

@@ -10,6 +10,12 @@ if( NOT MSVC_IDE AND NOT CMAKE_BUILD_TYPE )
     set( CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel." )
 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_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CMAKE_CONFIGURATION_TYPES})
+
 # Default installation path
 if(WIN32)
     set(CMAKE_INSTALL_PREFIX "/opt/rocm/x86_64-w64-mingw32" CACHE PATH "")
@@ -41,16 +47,10 @@ set(MIGRAPHX_SO_VERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR})
 
 option( BUILD_SHARED_LIBS "Build as a shared library" ON )
 
-if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.4")
-        message(FATAL_ERROR "MIGraph requires at least gcc 5.4")
-    endif()
-endif()
-
 include(CheckCXXCompilerFlag)
 check_cxx_compiler_flag("--cuda-host-only -x hip" HAS_HIP)
 if(HAS_HIP)
-    message(STATUS "Enable miopen backend")
+    message(STATUS "Enable gpu backend")
     set(MIGRAPHX_ENABLE_GPU On CACHE BOOL "")
 else()
     set(MIGRAPHX_ENABLE_GPU Off CACHE BOOL "")
@@ -60,10 +60,12 @@ endif()
 set(MIGRAPHX_ENABLE_CPU Off CACHE BOOL "")
 
 set(CMAKE_CXX_STANDARD_DEFAULT "")
-if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    add_compile_options(-std=c++17)
+add_compile_options(-std=c++17)
+
+if(${CMAKE_VERSION} VERSION_LESS "3.12.0")
+    set(CONFIGURE_DEPENDS)
 else()
-    add_compile_options(-std=c++14)
+    set(CONFIGURE_DEPENDS CONFIGURE_DEPENDS)
 endif()
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)