import magic for objective c utils

CoreStore.podspec

@@ -15,7 +15,8 @@ Pod::Spec.new do |s|
     s.source_files = "Sources", "Sources/**/*.{swift}"
     s.frameworks = "Foundation", "CoreData"
     s.requires_arc = true
-    s.pod_target_xcconfig = { 'OTHER_SWIFT_FLAGS' => '-D USE_FRAMEWORKS' }
+    s.pod_target_xcconfig = { 'OTHER_SWIFT_FLAGS' => '-D USE_FRAMEWORKS',
+                              'GCC_PREPROCESSOR_DEFINITIONS' => 'USE_FRAMEWORKS=1' }
     
     s.dependency "GCDKit", "1.2.5"
 end

CoreStore.xcodeproj/project.pbxproj

@@ -2422,6 +2422,7 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"DEBUG=1",
 					"$(inherited)",
+					"USE_FRAMEWORKS=1",
 				);
 				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -2472,6 +2473,7 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_PREPROCESSOR_DEFINITIONS = "USE_FRAMEWORKS=1";
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;

Sources/ObjectiveC/CoreStoreBridge.m

@@ -24,8 +24,20 @@
 //
 
 #import "CoreStoreBridge.h"
+
+#if USE_FRAMEWORKS
 #import <CoreStore/CoreStore-Swift.h>
 
+#elif !defined(SWIFT_OBJC_INTERFACE_HEADER_NAME)
+#error Add "SWIFT_OBJC_INTERFACE_HEADER_NAME=$(SWIFT_OBJC_INTERFACE_HEADER_NAME)" to the project's GCC_PREPROCESSOR_DEFINITIONS settings
+
+#else
+#define _STRINGIFY(x)    #x
+#define STRINGIFY(x)    _STRINGIFY(x)
+#import STRINGIFY(SWIFT_OBJC_INTERFACE_HEADER_NAME)
+
+#endif
+
 
 CS_OBJC_OVERLOADABLE
 CSFrom *_Nonnull CSFromClass(Class _Nonnull entityClass) CS_OBJC_RETURNS_RETAINED {