check for cxx flags with -pedantic-errors flag

cmake/modules/AmdisCXXFeatures.cmake

 include(CheckCXXSourceCompiles)
 
+set(CMAKE_REQUIRED_FLAGS "-pedantic-errors")
+
 # fold expressions (a + ...)
 check_cxx_source_compiles("
   template <class... Args>
@@ -53,3 +55,5 @@ check_cxx_source_compiles("
   }
 "  AMDIS_HAS_CXX_AUTO_TEMPLATE_PARAMETER
 )
+
+unset(CMAKE_REQUIRED_FLAGS)
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