3 files changed, 34 insertions, 0 deletions
diff --git a/Tests/SwiftMix/CMain.c b/Tests/SwiftMix/CMain.c
index 519058e..b274322 100644
--- a/Tests/SwiftMix/CMain.c
+++ b/Tests/SwiftMix/CMain.c
@@ -1,3 +1,16 @@
+#if !defined(FOO)
+#  error "FOO not defined"
+#endif
+#if BAR != 3
+#  error "FOO not defined to 3"
+#endif
+#if CCOND != 2
+#  error "CCOND not defined to 2"
+#endif
+#if defined(SWIFTCOND)
+#  error "SWIFTCOND defined"
+#endif
+
 extern int ObjCMain(void);
 int main(void)
 {
diff --git a/Tests/SwiftMix/CMakeLists.txt b/Tests/SwiftMix/CMakeLists.txt
index 6d8e48b..e8b6521 100644
--- a/Tests/SwiftMix/CMakeLists.txt
+++ b/Tests/SwiftMix/CMakeLists.txt
@@ -4,3 +4,4 @@ project(SwiftMix C Swift)
 add_executable(SwiftMix CMain.c ObjCMain.m SwiftMain.swift ObjC-Swift.h)
 set_property(TARGET SwiftMix PROPERTY XCODE_ATTRIBUTE_SWIFT_OBJC_BRIDGING_HEADER "ObjC-Swift.h")
 target_compile_options(SwiftMix PRIVATE "$<$<COMPILE_LANGUAGE:C>:-Werror=objc-method-access>")
+target_compile_definitions(SwiftMix PRIVATE "$<IF:$<COMPILE_LANGUAGE:Swift>,SWIFTCOND,CCOND=2>" FOO BAR=3)
diff --git a/Tests/SwiftMix/SwiftMain.swift b/Tests/SwiftMix/SwiftMain.swift
index d9c8cd7..238059d 100644
--- a/Tests/SwiftMix/SwiftMain.swift
+++ b/Tests/SwiftMix/SwiftMain.swift
@@ -3,6 +3,26 @@ import Foundation
 @objc class SwiftMainClass : NSObject {
   @objc class func SwiftMain() -> Int32 {
     dump("Hello World!");
+#if FOO
+    dump("FOO defined");
+#else
+    fatalError("FOO not defined");
+#endif
+#if BAR
+    dump("BAR defined");
+#else
+    fatalError("BAR not defined");
+#endif
+#if CCOND
+    fatalError("CCOND defined");
+#else
+    dump("CCOND not defined");
+#endif
+#if SWIFTCOND
+    dump("SWIFTCOND defined");
+#else
+    fatalError("SWIFTCOND not defined");
+#endif
     return 0;
   }
 }