[CMake] Stop some exectuable link with swiftCore

swift-compatibility-symbols, swift-def-to-strings-converter,
and swift-serialize-diagnostics don't use any Swift modules. But when
SWIFT_SWIFT_PARSER was enabled, they are linked with swiftCore. But
these binaries can be executed before the runtime is being built.
We need to stop them linking with swiftCore.

Author: rintaro

cmake/modules/AddSwift.cmake

@@ -833,7 +833,7 @@ endmacro()
 #
 # Usage:
 #   add_swift_host_tool(name
-#     [HAS_SWIFT_MODULES]
+#     [HAS_SWIFT_MODULES | DOES_NOT_USE_SWIFT]
 #     [THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY]
 #
 #     [BOOTSTRAPPING 0|1]
@@ -847,6 +847,9 @@ endmacro()
 # HAS_SWIFT_MODULES
 #   Whether to link with SwiftCompilerSources library
 #
+# DOES_NOT_USE_SWIFT
+#   Do not link with swift runtime
+#
 # THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY
 #   Opt-out of LLVM IR optimizations when linking ThinLTO with ld64
 #
@@ -862,7 +865,7 @@ endmacro()
 # source1 ...
 #   Sources to add into this executable.
 function(add_swift_host_tool executable)
-  set(options HAS_SWIFT_MODULES THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY)
+  set(options HAS_SWIFT_MODULES DOES_NOT_USE_SWIFT THINLTO_LD64_ADD_FLTO_CODEGEN_ONLY)
   set(single_parameter_options SWIFT_COMPONENT BOOTSTRAPPING)
   set(multiple_parameter_options LLVM_LINK_COMPONENTS)
 
@@ -918,7 +921,7 @@ function(add_swift_host_tool executable)
   endif()
 
   # Once the new Swift parser is linked in, every host tool has Swift modules.
-  if (SWIFT_SWIFT_PARSER)
+  if (SWIFT_SWIFT_PARSER AND NOT ASHT_DOES_NOT_USE_SWIFT)
     set(ASHT_HAS_SWIFT_MODULES ON)
   endif()
 

tools/swift-compatibility-symbols/CMakeLists.txt

@@ -2,6 +2,7 @@ add_swift_host_tool(swift-compatibility-symbols
   swift-compatibility-symbols.cpp
   LLVM_LINK_COMPONENTS support
   SWIFT_COMPONENT tools
+  DOES_NOT_USE_SWIFT
 )
 
 set(syms_file "${CMAKE_BINARY_DIR}/share/swift/compatibility-symbols")

tools/swift-def-to-strings-converter/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_swift_host_tool(swift-def-to-strings-converter
   swift-def-to-strings-converter.cpp
   SWIFT_COMPONENT tools
+  DOES_NOT_USE_SWIFT
 )
 
 target_link_libraries(swift-def-to-strings-converter PRIVATE

tools/swift-serialize-diagnostics/CMakeLists.txt

@@ -1,6 +1,7 @@
 add_swift_host_tool(swift-serialize-diagnostics
   swift-serialize-diagnostics.cpp
   SWIFT_COMPONENT tools
+  DOES_NOT_USE_SWIFT
 )
 target_link_libraries(swift-serialize-diagnostics PRIVATE
   swiftLocalization)