Tests: Enable ConfigSources test on every configuration

Revise the test itself to work in all configurations and verify that
certain sources are only built by whatever configuration is tested.

Tests/CMakeLists.txt

@@ -451,8 +451,8 @@ if(BUILD_TESTING)
   ADD_TEST_MACRO(StagingPrefix StagingPrefix)
   ADD_TEST_MACRO(ImportedSameName ImportedSameName)
   ADD_TEST_MACRO(InterfaceLibrary InterfaceLibrary)
-  if (CMAKE_BUILD_TYPE MATCHES "[Dd][Ee][Bb][Uu][Gg]")
-    set(ConfigSources_BUILD_OPTIONS -DCMAKE_BUILD_TYPE=Debug)
+  if(NOT _isMultiConfig)
+    set(ConfigSources_BUILD_OPTIONS -DCMAKE_BUILD_TYPE=$<CONFIGURATION>)
     ADD_TEST_MACRO(ConfigSources ConfigSources)
   endif()
   ADD_TEST_MACRO(SourcesProperty SourcesProperty)

Tests/ConfigSources/CMakeLists.txt

@@ -1,17 +1,21 @@
-
 cmake_minimum_required(VERSION 3.0)
-
-project(ConfigSources)
+project(ConfigSources CXX)
 
 add_library(iface INTERFACE)
-set_property(TARGET iface PROPERTY INTERFACE_SOURCES
+target_sources(iface INTERFACE
   "${CMAKE_CURRENT_SOURCE_DIR}/iface_src.cpp"
   "$<$<CONFIG:Debug>:${CMAKE_CURRENT_SOURCE_DIR}/iface_debug_src.cpp>"
-  "$<$<CONFIG:Release>:${CMAKE_CURRENT_SOURCE_DIR}/does_not_exist.cpp>"
-)
+  "$<$<NOT:$<CONFIG:Debug>>:${CMAKE_CURRENT_SOURCE_DIR}/iface_other_src.cpp>"
+  "$<$<CONFIG:NotAConfig>:${CMAKE_CURRENT_SOURCE_DIR}/does_not_exist.cpp>"
+  )
+target_compile_definitions(iface INTERFACE
+  "$<$<CONFIG:Debug>:CFG_DEBUG>"
+  "$<$<NOT:$<CONFIG:Debug>>:CFG_OTHER>"
+  )
 
 add_executable(ConfigSources
-  $<$<CONFIG:Debug>:main.cpp>
-  $<$<CONFIG:Release>:does_not_exist.cpp>
-)
+  $<$<CONFIG:Debug>:main_debug.cpp>
+  $<$<NOT:$<CONFIG:Debug>>:main_other.cpp>
+  $<$<CONFIG:NotAConfig>:does_not_exist.cpp>
+  )
 target_link_libraries(ConfigSources iface)

Tests/ConfigSources/iface.h

@@ -0,0 +1,10 @@
+
+int iface_src();
+
+#ifdef CFG_DEBUG
+int iface_debug();
+#endif
+
+#ifdef CFG_OTHER
+int iface_other();
+#endif

Tests/ConfigSources/iface_debug.h

@@ -1,4 +0,0 @@
-
-int iface_src();
-
-int iface_debug();

Tests/ConfigSources/iface_debug_src.cpp

@@ -1,5 +1,11 @@
+#ifndef CFG_DEBUG
+#  error "This source should only be compiled in a Debug configuration."
+#endif
+#ifdef CFG_OTHER
+#  error "This source should not be compiled in a non-Debug configuration."
+#endif
 
-#include "iface_debug.h"
+#include "iface.h"
 
 int iface_debug()
 {

Tests/ConfigSources/iface_other_src.cpp

@@ -0,0 +1,13 @@
+#ifndef CFG_OTHER
+#  error "This source should only be compiled in a non-Debug configuration."
+#endif
+#ifdef CFG_DEBUG
+#  error "This source should not be compiled in a Debug configuration."
+#endif
+
+#include "iface.h"
+
+int iface_other()
+{
+  return 0;
+}

Tests/ConfigSources/main.cpp

@@ -1,7 +0,0 @@
-
-#include "iface_debug.h"
-
-int main(int argc, char** argv)
-{
-  return iface_src() + iface_debug();
-}

Tests/ConfigSources/main_debug.cpp

@@ -0,0 +1,13 @@
+#ifndef CFG_DEBUG
+#  error "This source should only be compiled in a Debug configuration."
+#endif
+#ifdef CFG_OTHER
+#  error "This source should not be compiled in a non-Debug configuration."
+#endif
+
+#include "iface.h"
+
+int main(int argc, char** argv)
+{
+  return iface_src() + iface_debug();
+}

Tests/ConfigSources/main_other.cpp

@@ -0,0 +1,13 @@
+#ifndef CFG_OTHER
+#  error "This source should only be compiled in a non-Debug configuration."
+#endif
+#ifdef CFG_DEBUG
+#  error "This source should not be compiled in a Debug configuration."
+#endif
+
+#include "iface.h"
+
+int main(int argc, char** argv)
+{
+  return iface_src() + iface_other();
+}