Add mingw-w64 specific targets only when using mingw-w64

cmake/modules/AppTarget.cmake

@@ -136,17 +136,19 @@ if(NOT META_NO_INSTALL_TARGETS AND ENABLE_INSTALL_TARGETS)
     add_dependencies(install-binary-strip ${TARGET_PREFIX}${META_PROJECT_NAME}${TARGET_SUFFIX})
 
     # add mingw-w64 specific install targets
-    if(NOT TARGET install-mingw-w64)
-        add_custom_target(install-mingw-w64)
-        add_dependencies(install-mingw-w64 install-binary)
-    endif()
-    if(NOT TARGET install-mingw-w64-strip)
-        add_custom_target(install-mingw-w64-strip)
-        add_dependencies(install-mingw-w64-strip install-binary-strip)
-    endif()
-    if(LOCALIZATION_TARGET)
-        add_dependencies(install-mingw-w64 ${LOCALIZATION_TARGET})
-        add_dependencies(install-mingw-w64-strip ${LOCALIZATION_TARGET})
+    if(MINGW)
+        if(NOT TARGET install-mingw-w64)
+            add_custom_target(install-mingw-w64)
+            add_dependencies(install-mingw-w64 install-binary)
+        endif()
+        if(NOT TARGET install-mingw-w64-strip)
+            add_custom_target(install-mingw-w64-strip)
+            add_dependencies(install-mingw-w64-strip install-binary-strip)
+        endif()
+        if(LOCALIZATION_TARGET)
+            add_dependencies(install-mingw-w64 ${LOCALIZATION_TARGET})
+            add_dependencies(install-mingw-w64-strip ${LOCALIZATION_TARGET})
+        endif()
     endif()
 endif()