cmake: try using DWARF-3 to see if it fixes valgrind errors

Author: mcraveiro

projects/CMakeLists.txt

@@ -97,7 +97,7 @@ if (CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANGXX
     set(warning_flags "-Wall -Wextra -Wconversion")
 
     # force DWARF version to 4 in order to keep Valgrind happy.
-    set(warning_flags "${warning_flags} -gdwarf-4 -gstrict-dwarf")
+    set(warning_flags "${warning_flags} -gdwarf-3 -gstrict-dwarf")
 
     if (CMAKE_COMPILER_IS_GNUCXX)
         set(warning_flags "${warning_flags} -Wno-maybe-uninitialized")