Only print CMake system names on top level projects (#1731)

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

cmake/Sourcemeta.cmake

@@ -1,7 +1,3 @@
-# For debugging reasons
-message(STATUS "CMAKE_SYSTEM_NAME: ${CMAKE_SYSTEM_NAME}")
-message(STATUS "CMAKE_HOST_SYSTEM_NAME: ${CMAKE_HOST_SYSTEM_NAME}")
-
 set(SOURCEMETA_UTILITIES_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/common")
 include("${SOURCEMETA_UTILITIES_DIRECTORY}/shim.cmake")
 include("${SOURCEMETA_UTILITIES_DIRECTORY}/variables.cmake")
@@ -24,3 +20,9 @@ include("${SOURCEMETA_UTILITIES_DIRECTORY}/targets/googlebenchmark.cmake")
 if(NOT PROJECT_IS_TOP_LEVEL)
   set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" PARENT_SCOPE)
 endif()
+
+# For debugging purposes
+if(PROJECT_IS_TOP_LEVEL)
+  message(STATUS "CMAKE_SYSTEM_NAME: ${CMAKE_SYSTEM_NAME}")
+  message(STATUS "CMAKE_HOST_SYSTEM_NAME: ${CMAKE_HOST_SYSTEM_NAME}")
+endif()