Make linkage and dependencies a bit more coheasive in cmake for observation macros

Author: phausler

lib/Macros/Sources/ObservationMacros/CMakeLists.txt

@@ -62,9 +62,13 @@ target_compile_options("${library_name}" PRIVATE
     -emit-module-interface-path;
     "${module_interface_file}" ;
     -I ${CMAKE_BINARY_DIR}/lib/${SWIFT_HOST_LIBRARIES_SUBDIRECTORY};
-    -Xlinker -L${CMAKE_BINARY_DIR}/lib/${SWIFT_HOST_LIBRARIES_SUBDIRECTORY};
     -target;${target}>)
 
+target_link_libraries(${library_name}
+    PRIVATE
+    SwiftSyntax::SwiftSyntax
+    SwiftSyntax::SwiftSyntaxMacros
+)
 
 swift_install_in_component(TARGETS "${library_name}"
   RUNTIME
@@ -83,5 +87,3 @@ swift_install_in_component(TARGETS "${library_name}"
 swift_install_in_component(DIRECTORY "${module_base}"
                            DESTINATION "lib${LLVM_LIBDIR_SUFFIX}/${SWIFT_HOST_LIBRARIES_SUBDIRECTORY}"
                            COMPONENT compiler)
-
-# set_property(GLOBAL APPEND PROPERTY SWIFT_EXPORTS ${library_name})

stdlib/public/Observation/Sources/Observation/CMakeLists.txt

@@ -32,6 +32,8 @@ add_swift_target_library(swiftObservation ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS
   ThreadLocal.cpp
   ThreadLocal.swift
 
+  DEPENDS ObservationMacros
+
   SWIFT_COMPILE_FLAGS
     ${SWIFT_STANDARD_LIBRARY_SWIFT_FLAGS}
     ${SWIFT_OBSERVATION_SWIFT_FLAGS}