[lldb][CMake] Further gate swift-specific CMake code behind LLDB_ENABLE_SWIFT_SUPPORT

Author: bulbazord

lldb/CMakeLists.txt

@@ -17,6 +17,10 @@ endif()
 # Must go below project(..)
 include(GNUInstallDirs)
 
+# BEGIN SWIFT MOD
+option(LLDB_ENABLE_SWIFT_SUPPORT "Enable swift support" ON)
+# END SWIFT MOD
+
 if(LLDB_BUILT_STANDALONE)
   include(LLDBStandalone)
 
@@ -33,25 +37,29 @@ include(LLDBConfig)
 include(AddLLDB)
 
 # BEGIN - Swift Mods
-if(EXISTS "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}")
-   list(APPEND CMAKE_MODULE_PATH
-        "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/cmake"
-        "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/cmake/modules")
-elseif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../swift)
-   list(APPEND CMAKE_MODULE_PATH
-        "${CMAKE_CURRENT_SOURCE_DIR}/../swift/cmake"
-        "${CMAKE_CURRENT_SOURCE_DIR}/../swift/cmake/modules")
+if (LLDB_ENABLE_SWIFT_SUPPORT)
+  if(EXISTS "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}")
+     list(APPEND CMAKE_MODULE_PATH
+          "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/cmake"
+          "${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/cmake/modules")
+  elseif(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/../swift)
+     list(APPEND CMAKE_MODULE_PATH
+          "${CMAKE_CURRENT_SOURCE_DIR}/../swift/cmake"
+          "${CMAKE_CURRENT_SOURCE_DIR}/../swift/cmake/modules")
+  endif()
 endif()
 
 # When we have the early SwiftSyntax build, we can include its parser.
-if(SWIFT_PATH_TO_EARLYSWIFTSYNTAX_BUILD_DIR)
-  set(SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS
-    ${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_BUILD_DIR}/cmake/SwiftSyntaxTargets.cmake)
-  if(NOT EXISTS "${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS}")
-    message(STATUS "Skipping Swift Swift parser integration due to missing early SwiftSyntax")
-  else()
-    set(SWIFT_SWIFT_PARSER TRUE)
-    include(${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS})
+if (LLDB_ENABLE_SWIFT_SUPPORT)
+  if(SWIFT_PATH_TO_EARLYSWIFTSYNTAX_BUILD_DIR)
+    set(SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS
+      ${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_BUILD_DIR}/cmake/SwiftSyntaxTargets.cmake)
+    if(NOT EXISTS "${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS}")
+      message(STATUS "Skipping Swift Swift parser integration due to missing early SwiftSyntax")
+    else()
+      set(SWIFT_SWIFT_PARSER TRUE)
+      include(${SWIFT_PATH_TO_EARLYSWIFTSYNTAX_TARGETS})
+    endif()
   endif()
 endif()
 # END - Swift Mods

lldb/cmake/modules/LLDBConfig.cmake

@@ -86,10 +86,18 @@ option(LLDB_ENFORCE_STRICT_TEST_REQUIREMENTS
   "Fail to configure if certain requirements are not met for testing." OFF)
 
 # BEGIN SWIFT MOD
-option(LLDB_ENABLE_SWIFT_SUPPORT "Enable swift support" ON)
 option(LLDB_ENABLE_WERROR "Fail and stop if a warning is triggered." ${LLVM_ENABLE_WERROR})
 if(LLDB_ENABLE_SWIFT_SUPPORT)
   add_definitions( -DLLDB_ENABLE_SWIFT )
+else()
+  # LLVM_DISTRIBUTION_COMPONENTS may have swift-specific things in them (e.g.
+  # repl_swift). This may be set in a cache where LLDB_ENABLE_SWIFT_SUPPORT does
+  # not yet have a value. We have to touch up LLVM_DISTRIBUTION_COMPONENTS after
+  # the fact.
+  if(LLVM_DISTRIBUTION_COMPONENTS)
+    list(REMOVE_ITEM LLVM_DISTRIBUTION_COMPONENTS repl_swift)
+    set(LLVM_DISTRIBUTION_COMPONENTS ${LLVM_DISTRIBUTION_COMPONENTS} CACHE STRING "" FORCE)
+  endif()
 endif()
 # END SWIFT CODE
 
@@ -210,17 +218,19 @@ else ()
 endif ()
 include_directories("${CMAKE_CURRENT_BINARY_DIR}/../clang/include")
 
-if(NOT LLDB_BUILT_STANDALONE)
-  if (LLVM_EXTERNAL_SWIFT_SOURCE_DIR)
-    include_directories(${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/include)
-    include_directories(${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/stdlib/public/SwiftShims)
+if(LLDB_ENABLE_SWIFT_SUPPORT)
+  if(NOT LLDB_BUILT_STANDALONE)
+    if (LLVM_EXTERNAL_SWIFT_SOURCE_DIR)
+      include_directories(${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/include)
+      include_directories(${LLVM_EXTERNAL_SWIFT_SOURCE_DIR}/stdlib/public/SwiftShims)
+    else ()
+      include_directories(${CMAKE_SOURCE_DIR}/tools/swift/include)
+      include_directories(${CMAKE_SOURCE_DIR}/tools/swift/stdlib/public/SwiftShims)
+    endif ()
+    include_directories("${CMAKE_CURRENT_BINARY_DIR}/../swift/include")
   else ()
-    include_directories(${CMAKE_SOURCE_DIR}/tools/swift/include)
-    include_directories(${CMAKE_SOURCE_DIR}/tools/swift/stdlib/public/SwiftShims)
-  endif ()
-  include_directories("${CMAKE_CURRENT_BINARY_DIR}/../swift/include")
-else ()
-  include_directories("${SWIFT_INCLUDE_DIRS}")
+    include_directories("${SWIFT_INCLUDE_DIRS}")
+  endif()
 endif()
 
 # GCC silently accepts any -Wno-<foo> option, but warns about those options

lldb/cmake/modules/LLDBStandalone.cmake

@@ -14,7 +14,9 @@ option(LLVM_INSTALL_TOOLCHAIN_ONLY "Only include toolchain files in the 'install
 
 find_package(LLVM REQUIRED CONFIG HINTS ${LLVM_DIR} NO_CMAKE_FIND_ROOT_PATH)
 find_package(Clang REQUIRED CONFIG HINTS ${Clang_DIR} ${LLVM_DIR}/../clang NO_CMAKE_FIND_ROOT_PATH)
-find_package(Swift REQUIRED CONFIG HINTS "${Swift_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
+if(LLDB_ENABLE_SWIFT_SUPPORT)
+  find_package(Swift REQUIRED CONFIG HINTS "${Swift_DIR}" NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
+endif()
 
 # We set LLVM_CMAKE_DIR so that GetSVN.cmake is found correctly when building SVNVersion.inc
 set(LLVM_CMAKE_DIR ${LLVM_CMAKE_DIR} CACHE PATH "Path to LLVM CMake modules")
@@ -88,7 +90,9 @@ endif()
 # CMake modules to be in that directory as well.
 file(TO_CMAKE_PATH ${LLVM_DIR} LLVM_DIR)
 list(APPEND CMAKE_MODULE_PATH "${LLVM_DIR}")
-list(APPEND CMAKE_MODULE_PATH "${SWIFT_CMAKE_DIR}")
+if(LLDB_ENABLE_SWIFT_SUPPORT)
+  list(APPEND CMAKE_MODULE_PATH "${SWIFT_CMAKE_DIR}")
+endif()
 
 include(AddLLVM)
 include(TableGen)
@@ -124,9 +128,12 @@ include_directories(
   "${CMAKE_BINARY_DIR}/include"
   "${LLVM_INCLUDE_DIRS}"
   "${CLANG_INCLUDE_DIRS}"
-  "${SWIFT_INCLUDE_DIRS}"
-  "${SWIFT_MAIN_SRC_DIR}/include"
   "${CMAKE_CURRENT_SOURCE_DIR}/source")
+if(LLDB_ENABLE_SWIFT_SUPPORT)
+  include_directories(
+    "${SWIFT_INCLUDE_DIRS}"
+    "${SWIFT_MAIN_SRC_DIR}/include")
+endif()
 
 if(NOT DEFINED LLVM_COMMON_CMAKE_UTILS)
   set(LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)