PrintAsObjc Test: Test compatibility headers for C

Author: xymus

test/PrintAsObjC/cdecl-imports.swift

@@ -2,6 +2,7 @@
 // RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) %s -parse-as-library -typecheck -verify -emit-objc-header-path %t/swift.h
 // RUN: %FileCheck %s < %t/swift.h
 // RUN: %check-in-clang %t/swift.h
+// RUN: %check-in-clang-c %t/swift.h
 // RUN: %check-in-clang-cxx %t/swift.h
 
 // REQUIRES: objc_interop

test/PrintAsObjC/cdecl.swift

@@ -4,6 +4,7 @@
 // RUN: %FileCheck %s < %t/cdecl.h
 // RUN: %check-in-clang %t/cdecl.h
 // RUN: %check-in-clang -fno-modules -Qunused-arguments %t/cdecl.h -include ctypes.h -include CoreFoundation.h
+// RUN: %check-in-clang-c -fno-modules -Qunused-arguments %t/cdecl.h -include ctypes.h -include CoreFoundation.h
 // RUN: %check-in-clang-cxx -fno-modules -Qunused-arguments %t/cdecl.h -include ctypes.h -include CoreFoundation.h
 
 // REQUIRES: objc_interop

test/PrintAsObjC/lit.local.cfg

@@ -10,6 +10,15 @@ config.substitutions.insert(0, ('%check-in-clang',
   '-I %%clang-include-dir '
   '-isysroot %r/Inputs/clang-importer-sdk' % config.test_source_root) )
 
+config.substitutions.insert(0, ('%check-in-clang-c',
+  '%%clang -fsyntax-only -x c-header -std=c99 -fobjc-arc -fmodules '
+  '-fmodules-validate-system-headers '
+  '-Weverything -Werror -Wno-unused-macros -Wno-incomplete-module '
+  '-Wno-auto-import '
+  '-F %%clang-importer-sdk-path/frameworks '
+  '-I %%clang-include-dir '
+  '-isysroot %r/Inputs/clang-importer-sdk' % config.test_source_root) )
+
 config.substitutions.insert(0, ('%check-in-clang-cxx',
   '%%clang -fsyntax-only -x objective-c++-header -std=c++17 '
   '-fobjc-arc -fmodules -fmodules-validate-system-headers '