Simplify check for strtoll and strtoq.

CMakeLists.txt

@@ -140,10 +140,10 @@ if (MSVC)
   set (HAVE_strtoll 0)
   set (HAVE_strtoq  0)
 else ()
-  foreach (fname IN ITEMS strtoll strtoq)
-    string (TOUPPER "${fname}" FNAME)
-    check_cxx_symbol_exists ("${fname}" stdlib.h HAVE_${FNAME})
-  endforeach ()
+  check_cxx_symbol_exists (strtoll stdlib.h HAVE_STRTOLL)
+  if (NOT HAVE_STRTOLL)
+    check_cxx_symbol_exists (strtoq stdlib.h HAVE_STRTOQ)
+  endif ()
 endif ()
 
 set (CMAKE_THREAD_PREFER_PTHREAD TRUE)