dnl PSI_COMPUTE_STR(variable, string or expression)
dnl Compute a string constant value in a similar manner like AC_COMPUTE_INT.
AC_DEFUN(PSI_COMPUTE_STR, [
dnl PSI_COMPUTE_STR(variable, string or expression)
dnl Compute a string constant value in a similar manner like AC_COMPUTE_INT.
AC_DEFUN(PSI_COMPUTE_STR, [