Make the _Concurrency library depend on _Builtin_float

Author: DougGregor

stdlib/public/Concurrency/CMakeLists.txt

@@ -205,6 +205,14 @@ set(LLVM_OPTIONAL_SOURCES
   DispatchGlobalExecutor.cpp
 )
 
+set(SWIFT_CONCURRENCY_DEPENDENCIES)
+if((SWIFT_BUILD_CLANG_OVERLAYS
+    OR SWIFT_BUILD_TEST_SUPPORT_MODULES)
+   AND (NOT DEFINED SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT
+        OR NOT SWIFT_BUILD_CLANG_OVERLAYS_SKIP_BUILTIN_FLOAT))
+  set(SWIFT_CONCURRENCY_DEPENDENCIES _Builtin_float)
+endif()
+
 add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} IS_STDLIB
   ${SWIFT_RUNTIME_CONCURRENCY_C_SOURCES}
   ${SWIFT_RUNTIME_CONCURRENCY_EXECUTOR_SOURCES}
@@ -216,6 +224,7 @@ add_swift_target_library(swift_Concurrency ${SWIFT_STDLIB_LIBRARY_BUILD_TYPES} I
     TaskGroup+addTask.swift.gyb
     Task+startSynchronously.swift.gyb
 
+  SWIFT_MODULE_DEPENDS ${SWIFT_CONCURRENCY_DEPENDENCIES}
   SWIFT_MODULE_DEPENDS_ANDROID Android
   SWIFT_MODULE_DEPENDS_LINUX Glibc
   SWIFT_MODULE_DEPENDS_LINUX_STATIC Musl