Genex: CompilerId now can match against a list of ids.

This allows for expressions like:
 $<$<CXX_COMPILER_ID:Clang,GNU>:-DMY_PRIVATE_DEFINE>

3 files changed, 41 insertions, 2 deletions

diff --git a/Tests/CMakeCommands/target_compile_options/CMakeLists.txt b/Tests/CMakeCommands/target_compile_options/CMakeLists.txt
index a24cd53..ee187f5 100644
--- a/Tests/CMakeCommands/target_compile_options/CMakeLists.txt
+++ b/Tests/CMakeCommands/target_compile_options/CMakeLists.txt
@@ -7,9 +7,10 @@ add_executable(target_compile_options
   "${CMAKE_CURRENT_SOURCE_DIR}/main.cpp"
 )
 target_compile_options(target_compile_options
-  PRIVATE $<$<CXX_COMPILER_ID:GNU>:-DMY_PRIVATE_DEFINE>
+  PRIVATE $<$<CXX_COMPILER_ID:AppleClang,Clang,GNU>:-DMY_PRIVATE_DEFINE>
   PUBLIC $<$<COMPILE_LANG_AND_ID:CXX,GNU>:-DMY_PUBLIC_DEFINE>
   INTERFACE $<$<CXX_COMPILER_ID:GNU>:-DMY_INTERFACE_DEFINE>
+  INTERFACE $<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:-DMY_MULTI_COMP_INTERFACE_DEFINE>
 )
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
@@ -17,6 +18,11 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     PRIVATE
       "DO_GNU_TESTS"
   )
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  target_compile_definitions(target_compile_options
+    PRIVATE
+      "DO_CLANG_TESTS"
+  )
 endif()
 
 add_executable(consumer
@@ -40,7 +46,7 @@ if(CMAKE_GENERATOR MATCHES "Visual Studio")
 endif()
 
 target_compile_options(consumer
-  PRIVATE $<$<CXX_COMPILER_ID:GNU>:$<TARGET_PROPERTY:target_compile_options,INTERFACE_COMPILE_OPTIONS>>
+  PRIVATE $<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:$<TARGET_PROPERTY:target_compile_options,INTERFACE_COMPILE_OPTIONS>>
 )
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
@@ -48,6 +54,11 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
     PRIVATE
       "DO_GNU_TESTS"
   )
+elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  target_compile_definitions(consumer
+    PRIVATE
+      "DO_CLANG_TESTS"
+  )
 endif()
 
 # Test no items
diff --git a/Tests/CMakeCommands/target_compile_options/consumer.cpp b/Tests/CMakeCommands/target_compile_options/consumer.cpp
index fe79eb5..5cbe049 100644
--- a/Tests/CMakeCommands/target_compile_options/consumer.cpp
+++ b/Tests/CMakeCommands/target_compile_options/consumer.cpp
@@ -13,6 +13,22 @@
 #    error Expected MY_INTERFACE_DEFINE
 #  endif
 
+#  ifndef MY_MULTI_COMP_INTERFACE_DEFINE
+#    error Expected MY_MULTI_COMP_INTERFACE_DEFINE
+#  endif
+
+#endif
+
+#ifdef DO_CLANG_TESTS
+
+#  ifdef MY_PRIVATE_DEFINE
+#    error Unexpected MY_PRIVATE_DEFINE
+#  endif
+
+#  ifndef MY_MULTI_COMP_INTERFACE_DEFINE
+#    error Expected MY_MULTI_COMP_INTERFACE_DEFINE
+#  endif
+
 #endif
 
 #ifndef CONSUMER_LANG_CXX
diff --git a/Tests/CMakeCommands/target_compile_options/main.cpp b/Tests/CMakeCommands/target_compile_options/main.cpp
index 829a25e..edefdf2 100644
--- a/Tests/CMakeCommands/target_compile_options/main.cpp
+++ b/Tests/CMakeCommands/target_compile_options/main.cpp
@@ -15,6 +15,18 @@
 
 #endif
 
+#ifdef DO_CLANG_TESTS
+
+#  ifndef MY_PRIVATE_DEFINE
+#    error Expected MY_PRIVATE_DEFINE
+#  endif
+
+#  ifdef MY_PUBLIC_DEFINE
+#    error Unexpected MY_PUBLIC_DEFINE
+#  endif
+
+#endif
+
 int main()
 {
   return 0;