[CMake] Use LLVM_ENABLE_IDE instead of CMAKE_CONFIGURATION_TYPES

There are several places where we use CMAKE_CONFIGURATION_TYPES to determine if we are using an IDE generator and in turn decide not to generate some of the convenience targets (like all the install-* and check-llvm-* targets). This decision is made because IDEs don't always deal well with the thousands of targets LLVM can generate.

This approach does not work for Visual Studio 15's new CMake integration. Because VS15 uses a Ninja generator, it isn't a multi-configuration build, and generating all these extra targets mucks up the UI and adds little value.

With this change we still don't generate these targets by default for Visual Studio and Xcode generators, and LLVM_ENABLE_IDE becomes a switch that can be enabled on the VS15 CMake builds, to improve the IDE experience.

This is a re-land of r340435, with a few minor fix-ups. The issues causing the revert were addressed in r344218, r344219, and r344553.

llvm-svn: 344555

CMakeLists.txt

@@ -974,7 +974,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   add_custom_target(llvm-headers DEPENDS intrinsics_gen)
   set_target_properties(llvm-headers PROPERTIES FOLDER "Misc")
 
-  if (NOT CMAKE_CONFIGURATION_TYPES)
+  if (NOT LLVM_ENABLE_IDE)
     add_llvm_install_targets(install-llvm-headers
                              DEPENDS llvm-headers
                              COMPONENT llvm-headers)
@@ -984,7 +984,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   add_custom_target(llvm-libraries)
   set_target_properties(llvm-libraries PROPERTIES FOLDER "Misc")
 
-  if (NOT CMAKE_CONFIGURATION_TYPES)
+  if (NOT LLVM_ENABLE_IDE)
     add_llvm_install_targets(install-llvm-libraries
                              DEPENDS llvm-libraries
                              COMPONENT llvm-libraries)
@@ -1005,7 +1005,7 @@ endif()
 # This must be at the end of the LLVM root CMakeLists file because it must run
 # after all targets are created.
 if(LLVM_DISTRIBUTION_COMPONENTS)
-  if(CMAKE_CONFIGURATION_TYPES)
+  if(LLVM_ENABLE_IDE)
     message(FATAL_ERROR "LLVM_DISTRIBUTION_COMPONENTS cannot be specified with multi-configuration generators (i.e. Xcode or Visual Studio)")
   endif()
 

cmake/modules/AddLLVM.cmake

@@ -659,7 +659,7 @@ macro(add_llvm_library name)
               ${install_type} DESTINATION ${install_dir}
               COMPONENT ${name})
 
-      if (NOT CMAKE_CONFIGURATION_TYPES)
+      if (NOT LLVM_ENABLE_IDE)
         add_llvm_install_targets(install-${name}
                                  DEPENDS ${name}
                                  COMPONENT ${name})
@@ -890,7 +890,7 @@ macro(add_llvm_tool name)
               RUNTIME DESTINATION ${LLVM_TOOLS_INSTALL_DIR}
               COMPONENT ${name})
 
-      if (NOT CMAKE_CONFIGURATION_TYPES)
+      if (NOT LLVM_ENABLE_IDE)
         add_llvm_install_targets(install-${name}
                                  DEPENDS ${name}
                                  COMPONENT ${name})
@@ -928,7 +928,7 @@ macro(add_llvm_utility name)
     install (TARGETS ${name}
       RUNTIME DESTINATION ${LLVM_UTILS_INSTALL_DIR}
       COMPONENT ${name})
-    if (NOT CMAKE_CONFIGURATION_TYPES)
+    if (NOT LLVM_ENABLE_IDE)
       add_llvm_install_targets(install-${name}
                                DEPENDS ${name}
                                COMPONENT ${name})
@@ -1409,7 +1409,7 @@ function(add_lit_testsuite target comment)
 endfunction()
 
 function(add_lit_testsuites project directory)
-  if (NOT CMAKE_CONFIGURATION_TYPES)
+  if (NOT LLVM_ENABLE_IDE)
     cmake_parse_arguments(ARG "" "" "PARAMS;DEPENDS;ARGS" ${ARGN})
 
     # Search recursively for test directories by assuming anything not
@@ -1468,7 +1468,7 @@ function(llvm_install_library_symlink name dest type)
           CODE "install_symlink(${full_name} ${full_dest} ${output_dir})"
           COMPONENT ${component})
 
-  if (NOT CMAKE_CONFIGURATION_TYPES AND NOT ARG_ALWAYS_GENERATE)
+  if (NOT LLVM_ENABLE_IDE AND NOT ARG_ALWAYS_GENERATE)
     add_llvm_install_targets(install-${name}
                              DEPENDS ${name} ${dest} install-${dest}
                              COMPONENT ${name})
@@ -1501,7 +1501,7 @@ function(llvm_install_symlink name dest)
           CODE "install_symlink(${full_name} ${full_dest} ${LLVM_TOOLS_INSTALL_DIR})"
           COMPONENT ${component})
 
-  if (NOT CMAKE_CONFIGURATION_TYPES AND NOT ARG_ALWAYS_GENERATE)
+  if (NOT LLVM_ENABLE_IDE AND NOT ARG_ALWAYS_GENERATE)
     add_llvm_install_targets(install-${name}
                              DEPENDS ${name} ${dest} install-${dest}
                              COMPONENT ${name})

cmake/modules/CMakeLists.txt

@@ -132,7 +132,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
     PATTERN LLVM-Config.cmake EXCLUDE
     PATTERN GetHostTriple.cmake EXCLUDE)
 
-  if (NOT CMAKE_CONFIGURATION_TYPES)
+  if (NOT LLVM_ENABLE_IDE)
     # Add a dummy target so this can be used with LLVM_DISTRIBUTION_COMPONENTS
     add_custom_target(cmake-exports)
     add_llvm_install_targets(install-cmake-exports

tools/xcode-toolchain/CMakeLists.txt

@@ -100,7 +100,7 @@ add_llvm_install_targets(install-xcode-toolchain
                          PREFIX ${LLVMToolchainDir}/usr/)
 
 if(LLVM_DISTRIBUTION_COMPONENTS)
-  if(CMAKE_CONFIGURATION_TYPES)
+  if(LLVM_ENABLE_IDE)
     message(FATAL_ERROR "LLVM_DISTRIBUTION_COMPONENTS cannot be specified with multi-configuration generators (i.e. Xcode or Visual Studio)")
   endif()