lyx_cv_callstack_printing=$enableval, lyx_cv_callstack_printing=yes)
if test x"$lyx_cv_callstack_printing" = xyes; then
AC_CACHE_CHECK([whether printing callstack is possible],
[lyx_cv_callstack_printing],
lyx_cv_callstack_printing=$enableval, lyx_cv_callstack_printing=yes)
if test x"$lyx_cv_callstack_printing" = xyes; then
AC_CACHE_CHECK([whether printing callstack is possible],
[lyx_cv_callstack_printing],