http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54072
--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-07-23 13:17:33 UTC --- Currently, gfortran prints the following error message if the BOZ exceeds (for integers) the positive value: Error: Arithmetic overflow converting INTEGER(8) to INTEGER(4) at (1). This check can be disabled with the option -fno-range-check That perfectly matches the behaviour of Fortran 95, which had: "If a data-statement-constant is a boz-literal-constant, the corresponding object shall be of type integer. A data-stmt-constant that is a boz-literal-constant is treated as if the constant were an int-literalconstant with a kind-param that specifies the representation method with the largest decimal exponent range supported by the processor." I am not sure that the message text is the best for Fortran 2008, which has for DATA: "If a data-stmt-constant is a boz-literal-constant, the corresponding variable shall be of type integer. The boz-literal-constant is treated as if it were converted by the intrinsic function INT (13.7.81) to type integer with the kind type parameter of the variable" And for INT see the text quoted in comment 0, i.e. it is "is processor dependent".