message: Don't force -Wall and especially -Wextra
  This should be user's choice, not something done unconditionally.
diff: @@ -274,11 +274,6 @@ AS_IF([test "x$have_cld2" = "xyes"],
  -if test "x$GXX" = "xyes"; then
  - AX_CXX_CHECK_FLAG([-Wall],[],[], [CXXFLAGS="$CXXFLAGS -Wall"])
  - AX_CXX_CHECK_FLAG([-Wextra],[],[], [CXXFLAGS="$CXXFLAGS -Wextra"])
  -fi
  -
  CXXFLAGS="$CXXFLAGS $DEBUG_FLAGS -DwxNO_UNSAFE_WXSTRING_CONV=1 \"-DPOEDIT_PREFIX=\\\"$prefix\\\"\""
  