[CMake] Aggregate options for LLDB in LLDBConfig.cmake

[sgraenitz]

Summary

In preparation for LLDB.framework changes, collect options for LLDB in LLDBConfig.cmake (used for both, standalone and in-tree builds).

[aprantl]

Looks more organized.

[xiaobai]

Definitely much easier to read. Thanks for taking care of this! :)

[sgraenitz]

Remove old option LLDB_USE_ENTITLEMENTS here and not in D55328

CMakeLists.txt

 
 # Define the LLDB_CONFIGURATION_xxx matching the build type
 if( uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
   add_definitions( -DLLDB_CONFIGURATION_DEBUG )
 else()
   add_definitions( -DLLDB_CONFIGURATION_RELEASE )
 endif()
 
-if (CMAKE_SYSTEM_NAME MATCHES "Windows|Android")
-  set(LLDB_DEFAULT_DISABLE_LIBEDIT 1)
-else()
-  set(LLDB_DEFAULT_DISABLE_LIBEDIT 0)
-endif ()
-
-# We need libedit support to go down both the source and
-# the scripts directories.
-set(LLDB_DISABLE_LIBEDIT ${LLDB_DEFAULT_DISABLE_LIBEDIT} CACHE BOOL "Disables the use of editline.")
 if (LLDB_DISABLE_LIBEDIT)
   add_definitions( -DLLDB_DISABLE_LIBEDIT )
 else()
   find_package(LibEdit REQUIRED)
 endif()
 
 if(APPLE)
   add_definitions(-DLLDB_USE_OS_LOG)
 endif()
 
 # lldb-suite is a dummy target that encompasses all the necessary tools and
 # libraries for building a fully-functioning liblldb.
 add_custom_target(lldb-suite)
 set(LLDB_SUITE_TARGET lldb-suite)
 
-option(LLDB_BUILD_FRAMEWORK "Build the Darwin LLDB.framework" Off)
 if(LLDB_BUILD_FRAMEWORK)
-  if (CMAKE_VERSION VERSION_LESS 3.7)
-    message(FATAL_ERROR "LLDB_BUILD_FRAMEWORK is not supported on CMake < 3.7")
-  endif()
-  if (NOT APPLE)
-    message(FATAL_ERROR "LLDB.framework can only be generated when targeting Apple platforms")
-  endif()
-
   add_custom_target(lldb-framework)
+
   # These are used to fill out LLDB-Info.plist. These are relevant when building
   # the framework, and must be defined before building liblldb.
   set(PRODUCT_NAME "LLDB")
   set(EXECUTABLE_NAME "LLDB")
   set(CURRENT_PROJECT_VERSION "${LLDB_VERSION_MAJOR}.${LLDB_VERSION_MINOR}.${LLDB_VERSION_PATCH}")
   set(LLDB_SUITE_TARGET lldb-framework)
 
   set(LLDB_FRAMEWORK_DIR

cmake/modules/LLDBConfig.cmake

 include(CheckCXXSymbolExists)
 
 set(LLDB_PROJECT_ROOT ${CMAKE_CURRENT_SOURCE_DIR})
 set(LLDB_SOURCE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/source")
 set(LLDB_INCLUDE_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/include")
 
 set(LLDB_LINKER_SUPPORTS_GROUPS OFF)
 if (LLVM_COMPILER_IS_GCC_COMPATIBLE AND NOT "${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
   # The Darwin linker doesn't understand --start-group/--end-group.
   set(LLDB_LINKER_SUPPORTS_GROUPS ON)
 endif()
 
-set(LLDB_DEFAULT_DISABLE_PYTHON 0)
-set(LLDB_DEFAULT_DISABLE_CURSES 0)
+set(default_disable_python OFF)
+set(default_disable_curses OFF)
+set(default_disable_libedit OFF)
+
+if(DEFINED LLVM_ENABLE_LIBEDIT AND NOT LLVM_ENABLE_LIBEDIT)
+  set(default_disable_libedit ON)
+endif()
 
-if ( CMAKE_SYSTEM_NAME MATCHES "Windows" )
-  set(LLDB_DEFAULT_DISABLE_CURSES 1)
-elseif (CMAKE_SYSTEM_NAME MATCHES "Android" )
-  set(LLDB_DEFAULT_DISABLE_PYTHON 1)
-  set(LLDB_DEFAULT_DISABLE_CURSES 1)
+if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+  set(default_disable_curses ON)
+  set(default_disable_libedit ON)
+elseif(CMAKE_SYSTEM_NAME MATCHES "Android")
+  set(default_disable_python ON)
+  set(default_disable_curses ON)
+  set(default_disable_libedit ON)
 elseif(IOS)
-  set(LLDB_DEFAULT_DISABLE_PYTHON 1)
+  set(default_disable_python ON)
 endif()
 
-set(LLDB_DISABLE_PYTHON ${LLDB_DEFAULT_DISABLE_PYTHON} CACHE BOOL
-  "Disables the Python scripting integration.")
-set(LLDB_DISABLE_CURSES ${LLDB_DEFAULT_DISABLE_CURSES} CACHE BOOL
-  "Disables the Curses integration.")
-
-set(LLDB_RELOCATABLE_PYTHON 0 CACHE BOOL
-  "Causes LLDB to use the PYTHONHOME environment variable to locate Python.")
+option(LLDB_DISABLE_PYTHON "Disable Python scripting integration." ${default_disable_python})
+option(LLDB_DISABLE_CURSES "Disable Curses integration." ${default_disable_curses})
+option(LLDB_DISABLE_LIBEDIT "Disable the use of editline." ${default_disable_libedit})
+option(LLDB_RELOCATABLE_PYTHON "Use the PYTHONHOME environment variable to locate Python." OFF)
+option(LLDB_USE_SYSTEM_SIX "Use six.py shipped with system and do not install a copy of it" OFF)
+option(LLDB_USE_ENTITLEMENTS "When codesigning, use entitlements if available" ON)
+option(LLDB_BUILD_FRAMEWORK "Build LLDB.framework (Darwin only)" OFF)
 
-set(LLDB_USE_SYSTEM_SIX 0 CACHE BOOL
-  "Use six.py shipped with system and do not install a copy of it")
+if(LLDB_BUILD_FRAMEWORK)
+  if(NOT APPLE)
+    message(FATAL_ERROR "LLDB.framework can only be generated when targeting Apple platforms")
+  endif()
+  # CMake 3.6 did not correctly emit POST_BUILD commands for Apple Framework targets
+  if(CMAKE_VERSION VERSION_LESS 3.7)
+    message(FATAL_ERROR "LLDB_BUILD_FRAMEWORK is not supported on CMake < 3.7")
+  endif()
+endif()
 
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows")
   set(LLDB_EXPORT_ALL_SYMBOLS 0 CACHE BOOL
     "Causes lldb to export all symbols when building liblldb.")
 else()
   # Windows doesn't support toggling this, so don't bother making it a
   # cache variable.
   set(LLDB_EXPORT_ALL_SYMBOLS 0)
 endif()
 
 if ((NOT MSVC) OR MSVC12)
   add_definitions( -DHAVE_ROUND )
 endif()
 
 if (LLDB_DISABLE_CURSES)
   add_definitions( -DLLDB_DISABLE_CURSES )
 endif()
 
-option(LLDB_USE_ENTITLEMENTS "When code signing, use entitlements if available" ON)
-
 # On Windows, we can't use the normal FindPythonLibs module that comes with CMake,
 # for a number of reasons.
 # 1) Prior to MSVC 2015, it is only possible to embed Python if python itself was
 #    compiled with an identical version (and build configuration) of MSVC as LLDB.
 #    The standard algorithm does not take into account the differences between
 #    a binary release distribution of python and a custom built distribution.
 # 2) From MSVC 2015 and onwards, it is only possible to use Python 3.5 or later.
 # 3) FindPythonLibs queries the registry to locate Python, and when looking for a