Include Foundation framework instead of minimal NSObject.h

This change is for preventing scenarios like https://bugs.swift.org/projects/SR/issues/SR-2250

Author: maniramezan

lib/PrintAsObjC/PrintAsObjC.cpp

@@ -2438,7 +2438,7 @@ class ModuleWriter {
            "#endif\n"
            "\n"
            "#pragma clang diagnostic ignored \"-Wauto-import\"\n"
-           "#include <objc/NSObject.h>\n"
+           "#include <Foundation/Foundation.h>\n"
            "#include <stdint.h>\n"
            "#include <stddef.h>\n"
            "#include <stdbool.h>\n"

test/ClangImporter/MixedSource/resolve-cross-language.swift

@@ -2,7 +2,7 @@
 
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource) -emit-module -enable-objc-interop -emit-objc-header -o %t %S/Inputs/resolve-cross-language/Base.swift -disable-objc-attr-requires-foundation-module
 // RUN: cp %S/Inputs/resolve-cross-language/Base-module.map %t/module.map
-// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource) -enable-objc-interop -typecheck -I %t -F %S/Inputs/resolve-cross-language %s -verify
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk-nosource) -enable-objc-interop -typecheck -I %t -F %S/../../PrintAsObjC/Inputs/ -F %S/Inputs/resolve-cross-language %s -verify
 
 import Base
 import BaseUser

test/Index/cross_language.swift

@@ -8,7 +8,7 @@
 
 // RUN: cat %s > %t/combined.m
 // RUN: cat %S/Inputs/cross_language.m >> %t/combined.m
-// RUN: c-index-test core -print-source-symbols -- %t/combined.m -I %t -isysroot %S/../Inputs/clang-importer-sdk >> %t.idx.out
+// RUN: c-index-test core -print-source-symbols -- %t/combined.m -F %S/../PrintAsObjC/Inputs -I %t -isysroot %S/../Inputs/clang-importer-sdk >> %t.idx.out
 // RUN: %FileCheck %t/combined.m -input-file %t.idx.out
 
 #if SWIFT_CODE

test/PrintAsObjC/Inputs/Foundation.framework/Headers/Foundation.h

@@ -0,0 +1 @@
+#include <objc/NSObject.h>

test/PrintAsObjC/empty.swift

@@ -21,7 +21,7 @@
 // CHECK-NEXT: # define __has_feature(x) 0
 // CHECK-NEXT: #endif
 
-// CHECK-LABEL: #include <objc/NSObject.h>
+// CHECK-LABEL: #include <Foundation/Foundation.h>
 // CHECK: #include <stdint.h>
 // CHECK: #include <stddef.h>
 // CHECK: #include <stdbool.h>

test/PrintAsObjC/lit.local.cfg

@@ -6,6 +6,7 @@ config.substitutions.insert(0, ('%check-in-clang',
   '-fmodules-validate-system-headers '
   '-Weverything -Werror -Wno-unused-macros -Wno-incomplete-module '
   '-Wno-auto-import '
+  '-F %%S/Inputs/ '
   '-I %%clang-include-dir '
   '-isysroot %r/Inputs/clang-importer-sdk' % config.test_source_root) )
 
@@ -14,5 +15,6 @@ config.substitutions.insert(0, ('%check-in-clang\+\+',
   '-Weverything -Werror -Wno-unused-macros -Wno-incomplete-module '
   '-Wno-auto-import -Wno-variadic-macros -Wno-c++98-compat-pedantic '
   '-Wno-unused-command-line-argument ' # for -fmodules-cache-path
+  '-F %%S/Inputs/ '
   '-I %%clang-include-dir '
   '-isysroot %r/Inputs/clang-importer-sdk' % config.test_source_root) )

test/PrintAsObjC/reintroduced-new.m

@@ -8,11 +8,11 @@
 
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/../../test/Inputs/clang-importer-sdk -I %t) -emit-module -o %t %S/Inputs/reintroduced-new.swift -swift-version 4 -disable-objc-attr-requires-foundation-module -module-name main
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/../../test/Inputs/clang-importer-sdk -I %t) -parse-as-library %t/main.swiftmodule -typecheck -emit-objc-header-path %t/generated.h -disable-objc-attr-requires-foundation-module -swift-version 4
-// RUN: not %clang -fsyntax-only -x objective-c %s -include %t/generated.h -fobjc-arc -fmodules -Werror -isysroot %S/../../test/Inputs/clang-importer-sdk 2>&1 | %FileCheck -check-prefix=CHECK -check-prefix=CHECK-4 %s
+// RUN: not %clang -fsyntax-only -x objective-c %s -include %t/generated.h -fobjc-arc -fmodules -Werror -F %S/Inputs/ -isysroot %S/../../test/Inputs/clang-importer-sdk 2>&1 | %FileCheck -check-prefix=CHECK -check-prefix=CHECK-4 %s
 
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/../../test/Inputs/clang-importer-sdk -I %t) -emit-module -o %t %S/Inputs/reintroduced-new.swift -disable-objc-attr-requires-foundation-module -module-name main -swift-version 5
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/../../test/Inputs/clang-importer-sdk -I %t) -parse-as-library %t/main.swiftmodule -typecheck -emit-objc-header-path %t/generated.h -disable-objc-attr-requires-foundation-module -swift-version 5
-// RUN: not %clang -fsyntax-only -x objective-c %s -include %t/generated.h -fobjc-arc -fmodules -Werror -isysroot %S/../../test/Inputs/clang-importer-sdk 2>&1 | %FileCheck  -check-prefix=CHECK -check-prefix=CHECK-5 %s
+// RUN: not %clang -fsyntax-only -x objective-c %s -include %t/generated.h -fobjc-arc -fmodules -Werror -F %S/Inputs/ -isysroot %S/../../test/Inputs/clang-importer-sdk 2>&1 | %FileCheck  -check-prefix=CHECK -check-prefix=CHECK-5 %s
 
 // CHECK-NOT: error:
 

test/PrintAsObjC/swift_name.m

@@ -1,6 +1,6 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) %S/../Inputs/empty.swift -typecheck -emit-objc-header-path %t/empty.h
-// RUN: %clang -E -fobjc-arc -fmodules -isysroot %clang-importer-sdk-path -I %t %s | %FileCheck %s
+// RUN: %clang -F %S/Inputs/ -E -fobjc-arc -fmodules -isysroot %clang-importer-sdk-path -I %t %s | %FileCheck %s
 
 // REQUIRES: objc_interop