[lldb][NFC] Don't depend on Clang libraries from selected core libraries

[teemperor]

Summary

Alex Langford removed all the Clang dependencies from the core libraries (thanks!), so we can finally
drop them from the linker flags. We still depend on the Clang tablegen headers
to be generated (which is automatically added to all LLDB targets), but otherwise
building core libraries/tests no longer requires to build Clang.

[teemperor]

Also yes, Alex did all the work to make this happen and I am now pushing this over the finish line. This is known as a "pro gamer move" ;)

[teemperor]

Arg, nevermind, I built in the wrong directory... I thought we're already there, but there are a few dependencies still left.

[bulbazord]

In D103095#2779817, @teemperor wrote:

Arg, nevermind, I built in the wrong directory... I thought we're already there, but there are a few dependencies still left.

Yeah, there are a few particularly non-trivial dependencies left. Not so obvious how to fix them right now, but I've got a few ideas in my head. We can chat and figure out how to best decouple things.

lldb/source/Core/CMakeLists.txt

add_lldb_library(lldbCore
   ValueObjectDynamicValue.cpp
   ValueObjectList.cpp
   ValueObjectMemory.cpp
   ValueObjectRegister.cpp
   ValueObjectSyntheticFilter.cpp
   ValueObjectUpdater.cpp
   ValueObjectVariable.cpp
 
-  DEPENDS
-    clang-tablegen-targets
-
   LINK_LIBS
     lldbBreakpoint
     lldbDataFormatters
     lldbExpression
     lldbHost
     lldbInterpreter
     lldbSymbol
     lldbTarget
     lldbUtility
-    lldbPluginCPlusPlusLanguage
-    lldbPluginObjCLanguage
     ${LLDB_CURSES_LIBS}
 
-  CLANG_LIBS
-    clangDriver
-
   LINK_COMPONENTS
     Support
     Demangle
   )
 
 add_dependencies(lldbCore
   LLDBCorePropertiesGen
   LLDBCorePropertiesEnumGen)

lldb/source/Expression/CMakeLists.txt

add_lldb_library(lldbExpression
 
   LINK_LIBS
     lldbCore
     lldbHost
     lldbInterpreter
     lldbSymbol
     lldbTarget
     lldbUtility
-    lldbPluginCPlusPlusLanguage
-    lldbPluginObjectFileJIT
 
   LINK_COMPONENTS
     Core
     ExecutionEngine
     Support
   )

lldb/source/Symbol/CMakeLists.txt

add_lldb_library(lldbSymbol
   ${PLATFORM_SOURCES}
 
   LINK_LIBS
     lldbCore
     lldbExpression
     lldbHost
     lldbTarget
     lldbUtility
-    lldbPluginObjCLanguage
 
   LINK_COMPONENTS
     Support
   )