add test to ensure consistent compatibility macro definitions

test/PrintAsObjC/Inputs/CrossCompiler.framework/Headers/cross-compiler.h

@@ -0,0 +1,7 @@
+#ifndef CROSS_COMPILER_H
+#define CROSS_COMPILER_H
+
+#include "empty.h"
+#include "old-compiler.h"
+
+#endif

test/PrintAsObjC/Inputs/CrossCompiler.framework/Headers/old-compiler.h

@@ -0,0 +1,268 @@
+// Generated by Apple Swift version 5.7.2 (swiftlang-5.7.2.135.5 clang-1400.0.29.51)
+#ifndef SWIFT57FRAMEWORK_SWIFT_H
+#define SWIFT57FRAMEWORK_SWIFT_H
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgcc-compat"
+
+#if !defined(__has_include)
+# define __has_include(x) 0
+#endif
+#if !defined(__has_attribute)
+# define __has_attribute(x) 0
+#endif
+#if !defined(__has_feature)
+# define __has_feature(x) 0
+#endif
+#if !defined(__has_warning)
+# define __has_warning(x) 0
+#endif
+
+#if __has_include(<swift/objc-prologue.h>)
+# include <swift/objc-prologue.h>
+#endif
+
+#pragma clang diagnostic ignored "-Wduplicate-method-match"
+#pragma clang diagnostic ignored "-Wauto-import"
+#if defined(__OBJC__)
+#include <Foundation/Foundation.h>
+#endif
+#if defined(__cplusplus)
+#include <cstdint>
+#include <cstddef>
+#include <cstdbool>
+#else
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#endif
+
+#define defined_replacement(x) 1
+
+#if defined_replacement(SWIFT_TYPEDEFS)
+# define SWIFT_TYPEDEFS 1
+# if __has_include(<uchar.h>)
+#  include <uchar.h>
+# elif !defined(__cplusplus)
+typedef uint_least16_t char16_t;
+typedef uint_least32_t char32_t;
+# endif
+typedef float swift_float2  __attribute__((__ext_vector_type__(2)));
+typedef float swift_float3  __attribute__((__ext_vector_type__(3)));
+typedef float swift_float4  __attribute__((__ext_vector_type__(4)));
+typedef double swift_double2  __attribute__((__ext_vector_type__(2)));
+typedef double swift_double3  __attribute__((__ext_vector_type__(3)));
+typedef double swift_double4  __attribute__((__ext_vector_type__(4)));
+typedef int swift_int2  __attribute__((__ext_vector_type__(2)));
+typedef int swift_int3  __attribute__((__ext_vector_type__(3)));
+typedef int swift_int4  __attribute__((__ext_vector_type__(4)));
+typedef unsigned int swift_uint2  __attribute__((__ext_vector_type__(2)));
+typedef unsigned int swift_uint3  __attribute__((__ext_vector_type__(3)));
+typedef unsigned int swift_uint4  __attribute__((__ext_vector_type__(4)));
+#endif
+
+#if defined_replacement(SWIFT_PASTE)
+# define SWIFT_PASTE_HELPER(x, y) x##y
+# define SWIFT_PASTE(x, y) SWIFT_PASTE_HELPER(x, y)
+#endif
+#if defined_replacement(SWIFT_METATYPE)
+# define SWIFT_METATYPE(X) Class
+#endif
+#if defined_replacement(SWIFT_CLASS_PROPERTY)
+# if __has_feature(objc_class_property)
+#  define SWIFT_CLASS_PROPERTY(...) __VA_ARGS__
+# else
+#  define SWIFT_CLASS_PROPERTY(...)
+# endif
+#endif
+
+#if __has_attribute(objc_runtime_name)
+# define SWIFT_RUNTIME_NAME(X) __attribute__((objc_runtime_name(X)))
+#else
+# define SWIFT_RUNTIME_NAME(X)
+#endif
+#if __has_attribute(swift_name)
+# define SWIFT_COMPILE_NAME(X) __attribute__((swift_name(X)))
+#else
+# define SWIFT_COMPILE_NAME(X)
+#endif
+#if __has_attribute(objc_method_family)
+# define SWIFT_METHOD_FAMILY(X) __attribute__((objc_method_family(X)))
+#else
+# define SWIFT_METHOD_FAMILY(X)
+#endif
+#if __has_attribute(noescape)
+# define SWIFT_NOESCAPE __attribute__((noescape))
+#else
+# define SWIFT_NOESCAPE
+#endif
+#if __has_attribute(ns_consumed)
+# define SWIFT_RELEASES_ARGUMENT __attribute__((ns_consumed))
+#else
+# define SWIFT_RELEASES_ARGUMENT
+#endif
+#if __has_attribute(warn_unused_result)
+# define SWIFT_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
+#else
+# define SWIFT_WARN_UNUSED_RESULT
+#endif
+#if __has_attribute(noreturn)
+# define SWIFT_NORETURN __attribute__((noreturn))
+#else
+# define SWIFT_NORETURN
+#endif
+#if defined_replacement(SWIFT_CLASS_EXTRA)
+# define SWIFT_CLASS_EXTRA
+#endif
+#if defined_replacement(SWIFT_PROTOCOL_EXTRA)
+# define SWIFT_PROTOCOL_EXTRA
+#endif
+#if defined_replacement(SWIFT_ENUM_EXTRA)
+# define SWIFT_ENUM_EXTRA
+#endif
+#if defined_replacement(SWIFT_CLASS)
+# if __has_attribute(objc_subclassing_restricted)
+#  define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_CLASS_EXTRA
+#  define SWIFT_CLASS_NAMED(SWIFT_NAME) __attribute__((objc_subclassing_restricted)) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
+# else
+#  define SWIFT_CLASS(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
+#  define SWIFT_CLASS_NAMED(SWIFT_NAME) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_CLASS_EXTRA
+# endif
+#endif
+#if defined_replacement(SWIFT_RESILIENT_CLASS)
+# if __has_attribute(objc_class_stub)
+#  define SWIFT_RESILIENT_CLASS(SWIFT_NAME) SWIFT_CLASS(SWIFT_NAME) __attribute__((objc_class_stub))
+#  define SWIFT_RESILIENT_CLASS_NAMED(SWIFT_NAME) __attribute__((objc_class_stub)) SWIFT_CLASS_NAMED(SWIFT_NAME)
+# else
+#  define SWIFT_RESILIENT_CLASS(SWIFT_NAME) SWIFT_CLASS(SWIFT_NAME)
+#  define SWIFT_RESILIENT_CLASS_NAMED(SWIFT_NAME) SWIFT_CLASS_NAMED(SWIFT_NAME)
+# endif
+#endif
+
+#if defined_replacement(SWIFT_PROTOCOL)
+# define SWIFT_PROTOCOL(SWIFT_NAME) SWIFT_RUNTIME_NAME(SWIFT_NAME) SWIFT_PROTOCOL_EXTRA
+# define SWIFT_PROTOCOL_NAMED(SWIFT_NAME) SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_PROTOCOL_EXTRA
+#endif
+
+#if defined_replacement(SWIFT_EXTENSION)
+# define SWIFT_EXTENSION(M) SWIFT_PASTE(M##_Swift_, __LINE__)
+#endif
+
+#if !defined(OBJC_DESIGNATED_INITIALIZER)
+# if __has_attribute(objc_designated_initializer)
+#  define OBJC_DESIGNATED_INITIALIZER __attribute__((objc_designated_initializer))
+# else
+#  define OBJC_DESIGNATED_INITIALIZER
+# endif
+#endif
+#if defined_replacement(SWIFT_ENUM_ATTR)
+# if defined(__has_attribute) && __has_attribute(enum_extensibility)
+#  define SWIFT_ENUM_ATTR(_extensibility) __attribute__((enum_extensibility(_extensibility)))
+# else
+#  define SWIFT_ENUM_ATTR(_extensibility)
+# endif
+#endif
+#if defined_replacement(SWIFT_ENUM)
+# define SWIFT_ENUM(_type, _name, _extensibility) enum _name : _type _name; enum SWIFT_ENUM_ATTR(_extensibility) SWIFT_ENUM_EXTRA _name : _type
+# if __has_feature(generalized_swift_name)
+#  define SWIFT_ENUM_NAMED(_type, _name, SWIFT_NAME, _extensibility) enum _name : _type _name SWIFT_COMPILE_NAME(SWIFT_NAME); enum SWIFT_COMPILE_NAME(SWIFT_NAME) SWIFT_ENUM_ATTR(_extensibility) SWIFT_ENUM_EXTRA _name : _type
+# else
+#  define SWIFT_ENUM_NAMED(_type, _name, SWIFT_NAME, _extensibility) SWIFT_ENUM(_type, _name, _extensibility)
+# endif
+#endif
+#if defined_replacement(SWIFT_UNAVAILABLE)
+# define SWIFT_UNAVAILABLE __attribute__((unavailable))
+#endif
+#if defined_replacement(SWIFT_UNAVAILABLE_MSG)
+# define SWIFT_UNAVAILABLE_MSG(msg) __attribute__((unavailable(msg)))
+#endif
+#if defined_replacement(SWIFT_AVAILABILITY)
+# define SWIFT_AVAILABILITY(plat, ...) __attribute__((availability(plat, __VA_ARGS__)))
+#endif
+#if defined_replacement(SWIFT_WEAK_IMPORT)
+# define SWIFT_WEAK_IMPORT __attribute__((weak_import))
+#endif
+#if defined_replacement(SWIFT_DEPRECATED)
+# define SWIFT_DEPRECATED __attribute__((deprecated))
+#endif
+#if defined_replacement(SWIFT_DEPRECATED_MSG)
+# define SWIFT_DEPRECATED_MSG(...) __attribute__((deprecated(__VA_ARGS__)))
+#endif
+#if __has_feature(attribute_diagnose_if_objc)
+# define SWIFT_DEPRECATED_OBJC(Msg) __attribute__((diagnose_if(1, Msg, "warning")))
+#else
+# define SWIFT_DEPRECATED_OBJC(Msg) SWIFT_DEPRECATED_MSG(Msg)
+#endif
+#if defined(__OBJC__)
+#if !defined(IBSegueAction)
+# define IBSegueAction
+#endif
+#endif
+#if defined_replacement(SWIFT_EXTERN)
+# if defined(__cplusplus)
+#  define SWIFT_EXTERN extern "C"
+# else
+#  define SWIFT_EXTERN extern
+# endif
+#endif
+#if defined_replacement(SWIFT_CALL)
+# define SWIFT_CALL __attribute__((swiftcall))
+#endif
+#if defined(__cplusplus)
+#if defined_replacement(SWIFT_NOEXCEPT)
+# define SWIFT_NOEXCEPT noexcept
+#endif
+#else
+#if defined_replacement(SWIFT_NOEXCEPT)
+# define SWIFT_NOEXCEPT 
+#endif
+#endif
+#if defined(__cplusplus)
+#if defined_replacement(SWIFT_CXX_INT_DEFINED)
+#define SWIFT_CXX_INT_DEFINED
+namespace swift {
+using Int = ptrdiff_t;
+using UInt = size_t;
+}
+#endif
+#endif
+#if defined(__OBJC__)
+#if __has_feature(modules)
+#if __has_warning("-Watimport-in-framework-header")
+#pragma clang diagnostic ignored "-Watimport-in-framework-header"
+#endif
+@import ObjectiveC;
+#endif
+
+#endif
+#pragma clang diagnostic ignored "-Wproperty-attribute-mismatch"
+#pragma clang diagnostic ignored "-Wduplicate-method-arg"
+#if __has_warning("-Wpragma-clang-attribute")
+# pragma clang diagnostic ignored "-Wpragma-clang-attribute"
+#endif
+#pragma clang diagnostic ignored "-Wunknown-pragmas"
+#pragma clang diagnostic ignored "-Wnullability"
+#pragma clang diagnostic ignored "-Wdollar-in-identifier-extension"
+
+#if __has_attribute(external_source_symbol)
+# pragma push_macro("any")
+# undef any
+# pragma clang attribute push(__attribute__((external_source_symbol(language="Swift", defined_in="Swift57Framework",generated_declaration))), apply_to=any(function,enum,objc_interface,objc_category,objc_protocol))
+# pragma pop_macro("any")
+#endif
+
+#if defined(__OBJC__)
+
+SWIFT_CLASS("_TtC16Swift57Framework3Foo")
+@interface Foo : NSObject
+- (nonnull instancetype)init OBJC_DESIGNATED_INITIALIZER;
+@end
+
+#endif
+#if defined(__cplusplus)
+#endif
+#if __has_attribute(external_source_symbol)
+# pragma clang attribute pop
+#endif
+#pragma clang diagnostic pop
+#endif
+

test/PrintAsObjC/Inputs/CrossCompiler.framework/module.map

@@ -0,0 +1,4 @@
+framework module CrossCompiler {
+  header "cross-compiler.h"
+  export *
+}

test/PrintAsObjC/cross-compiler.swift

@@ -0,0 +1,12 @@
+// RUN: %empty-directory(%t)
+// RUN: cp -r %S/Inputs/CrossCompiler.framework %t/
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) %S/../Inputs/empty.swift -typecheck -emit-objc-header-path %t/CrossCompiler.framework/Headers/empty.h
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -enable-objc-interop -emit-module-path %t/CrossCompiler.framework/Modules/CrossCompiler.swiftmodule/%target-swiftmodule-name -import-underlying-module -F %t -F %clang-importer-sdk-path/frameworks -module-name CrossCompiler -disable-objc-attr-requires-foundation-module -parse-as-library %s -Xcc -Werror
+
+// Ensure that building with multiple compatibility headers from different compilers doesn't
+// trigger "macro redefinition" errors (rdar://106087804)
+
+// CrossCompiler.framework contains a modified header generated with Swift 5.7 (before the
+// PrintAsClang refactor to make macros data-driven). By compiling it alongside a freshly-generated
+// header, we can make sure that the macro definitions are the same before and after the switch.
+