build: remove TARGET_SDKS from the runtime

The runtime and stubs are built for ALL targets, not specific ones.  This allows
us to configure when cross-compiling to Windows again.  Collapse the dual
addition of the swiftRuntime into a single build.  This unifies the runtime
build for the apple and non-Apple SDKs.  The difference here was the ObjC
interop sources.  In order to deal with that unification add a CPP macro to
indicate whether the interop sources should be included or not.

Author: compnerd

stdlib/public/runtime/CMakeLists.txt

@@ -51,9 +51,7 @@ set(swift_runtime_sources
     Once.cpp
     Portability.cpp
     ProtocolConformance.cpp
-    ReflectionNative.cpp
-    RuntimeEntrySymbols.cpp
-    SwiftObjectNative.cpp)
+    RuntimeEntrySymbols.cpp)
 
 # Acknowledge that the following sources are known.
 set(LLVM_OPTIONAL_SOURCES
@@ -119,16 +117,7 @@ add_swift_library(swiftRuntime OBJECT_LIBRARY TARGET_LIBRARY
   ${swift_runtime_leaks_sources}
   C_COMPILE_FLAGS ${swift_runtime_library_compile_flags}
   LINK_FLAGS ${swift_runtime_linker_flags}
-  INSTALL_IN_COMPONENT never_install
-  TARGET_SDKS ALL_APPLE_PLATFORMS)
-
-add_swift_library(swiftRuntime OBJECT_LIBRARY TARGET_LIBRARY
-  ${swift_runtime_sources}
-  ${swift_runtime_leaks_sources}
-  C_COMPILE_FLAGS ${swift_runtime_library_compile_flags}
-  LINK_FLAGS ${swift_runtime_linker_flags}
-  INSTALL_IN_COMPONENT never_install
-  TARGET_SDKS ANDROID CYGWIN FREEBSD LINUX)
+  INSTALL_IN_COMPONENT never_install)
 
 set(ELFISH_SDKS)
 foreach(sdk ${SWIFT_CONFIGURED_SDKS})

stdlib/public/runtime/ErrorObject.mm

@@ -21,6 +21,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "swift/Runtime/Config.h"
+
+#if SWIFT_OBJC_INTEROP
 #include "swift/Runtime/Debug.h"
 #include "swift/Runtime/ObjCBridge.h"
 #include "swift/Basic/Lazy.h"
@@ -592,3 +595,5 @@ static void _swift_willThrow_(SwiftError *error) { }
 void swift::swift_willThrow(SwiftError *error) {
   return _swift_willThrow(error);
 }
+#endif
+

stdlib/public/runtime/ReflectionNative.cpp

@@ -16,6 +16,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "swift/Runtime/Config.h"
+
 #if SWIFT_OBJC_INTEROP
 #include <objc/NSObject.h>
 #include <objc/runtime.h>

stdlib/public/runtime/SwiftObject.mm

@@ -18,6 +18,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "swift/Runtime/Config.h"
+
+#if SWIFT_OBJC_INTEROP
 #include "SwiftObject.h"
 #include "SwiftValue.h"
 #include "swift/Basic/Lazy.h"
@@ -30,10 +33,6 @@
 #include <objc/runtime.h>
 #include <Foundation/Foundation.h>
 
-#if !SWIFT_OBJC_INTEROP
-#error "This file should only be compiled when ObjC interop is enabled."
-#endif
-
 using namespace swift;
 using namespace swift::hashable_support;
 
@@ -380,6 +379,7 @@ - (const OpaqueValue *)_swiftValue {
 }
 
 @end
+#endif
 
 // TODO: We could pick specialized _SwiftValue subclasses for trivial types
 // or for types with known size and alignment characteristics. Probably

stdlib/public/runtime/SwiftObjectNative.cpp

@@ -14,6 +14,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "swift/Runtime/Config.h"
+
+#if SWIFT_OBJC_INTEROP
 #include "swift/Basic/Lazy.h"
 #include "swift/Runtime/Debug.h"
 #import <Foundation/Foundation.h>
@@ -93,3 +96,5 @@ static NSOperatingSystemVersion getOSVersion() {
 
   return { version.majorVersion, version.minorVersion, version.patchVersion };
 }
+#endif
+

stdlib/public/runtime/SwiftValue.mm

@@ -23,16 +23,8 @@ list(APPEND swift_stubs_c_compile_flags -DswiftCore_EXPORTS)
 add_swift_library(swiftStdlibStubs OBJECT_LIBRARY TARGET_LIBRARY
   ${swift_stubs_sources}
   ${swift_stubs_objc_sources}
-  C_COMPILE_FLAGS ${swift_stubs_c_compile_flags}
-  LINK_FLAGS ${SWIFT_RUNTIME_CORE_LINK_FLAGS}
-  TARGET_SDKS ALL_APPLE_PLATFORMS
-  INSTALL_IN_COMPONENT stdlib)
-
-add_swift_library(swiftStdlibStubs OBJECT_LIBRARY TARGET_LIBRARY
-  ${swift_stubs_sources}
   ${swift_stubs_unicode_normalization_sources}
   C_COMPILE_FLAGS ${swift_stubs_c_compile_flags}
   LINK_FLAGS ${SWIFT_RUNTIME_CORE_LINK_FLAGS}
-  TARGET_SDKS ANDROID CYGWIN FREEBSD LINUX
   INSTALL_IN_COMPONENT stdlib)
 

stdlib/public/stubs/Availability.mm

@@ -16,6 +16,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "swift/Runtime/Config.h"
+
+#if SWIFT_OBJC_INTEROP
 #import <CoreFoundation/CoreFoundation.h>
 #include "../SwiftShims/CoreFoundationShims.h"
 
@@ -112,3 +115,5 @@ static CFRange cast(_swift_shims_CFRange value) {
 swift::_swift_stdlib_objcDebugDescription(id _Nonnull nsObject) {
   return [nsObject debugDescription];
 }
+#endif
+

stdlib/public/stubs/CMakeLists.txt

@@ -10,6 +10,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "swift/Runtime/Config.h"
+
+#if SWIFT_OBJC_INTEROP
 #include "swift/Basic/Lazy.h"
 #include "swift/Basic/LLVM.h"
 #include "swift/Runtime/Metadata.h"
@@ -97,3 +100,5 @@ id _swift_Foundation_getOptionalNilSentinelObject(const Metadata *Wrapped) {
 
   return objc_retain(getSentinelForDepth(depth));
 }
+#endif
+