[lldb/cmake] Remove EXTRA_CXXFLAGS arg (#143731)

We have one library using this and three libraries directly calling
`target_compile_options`. Might as well standardize on the latter.

lldb/cmake/modules/AddLLDB.cmake

@@ -41,7 +41,7 @@ function(add_lldb_library name)
   cmake_parse_arguments(PARAM
     "MODULE;SHARED;STATIC;OBJECT;PLUGIN;FRAMEWORK;NO_INTERNAL_DEPENDENCIES;NO_PLUGIN_DEPENDENCIES"
     "INSTALL_PREFIX"
-    "EXTRA_CXXFLAGS;LINK_LIBS;CLANG_LIBS"
+    "LINK_LIBS;CLANG_LIBS"
     ${ARGN})
 
   if(PARAM_NO_INTERNAL_DEPENDENCIES)
@@ -130,9 +130,6 @@ function(add_lldb_library name)
     add_dependencies(${name} clang-tablegen-targets)
   endif()
 
-  # Add in any extra C++ compilation flags for this library.
-  target_compile_options(${name} PRIVATE ${PARAM_EXTRA_CXXFLAGS})
-
   if(PARAM_PLUGIN)
     get_property(parent_dir DIRECTORY PROPERTY PARENT_DIRECTORY)
     if(EXISTS ${parent_dir})

lldb/source/Plugins/Language/ObjC/CMakeLists.txt

@@ -1,13 +1,3 @@
-set(EXTRA_CXXFLAGS "")
-
-if (CXX_SUPPORTS_NO_GNU_ANONYMOUS_STRUCT)
-  set(EXTRA_CXXFLAGS ${EXTRA_CXXFLAGS} -Wno-gnu-anonymous-struct)
-endif ()
-
-if (CXX_SUPPORTS_NO_NESTED_ANON_TYPES)
-  set(EXTRA_CXXFLAGS ${EXTRA_CXXFLAGS} -Wno-nested-anon-types)
-endif ()
-
 add_lldb_library(lldbPluginObjCLanguage PLUGIN
   ObjCLanguage.cpp
   CF.cpp
@@ -36,6 +26,14 @@ add_lldb_library(lldbPluginObjCLanguage PLUGIN
     lldbPluginTypeSystemClang
   CLANG_LIBS
     clangAST
-
-  EXTRA_CXXFLAGS ${EXTRA_CXXFLAGS}
 )
+
+if (CXX_SUPPORTS_NO_GNU_ANONYMOUS_STRUCT)
+  target_compile_options(lldbPluginObjCLanguage
+    PRIVATE -Wno-gnu-anonymous-struct)
+endif ()
+
+if (CXX_SUPPORTS_NO_NESTED_ANON_TYPES)
+  target_compile_options(lldbPluginObjCLanguage
+    PRIVATE -Wno-nested-anon-types)
+endif ()