LF95 Linux User's Guide - Lahey Computer Systems

Appendix B Runtime Optionsnumbers. If both -T and -Tunit are specified, then -T takes effect for all unit numbers. Bydefault, LF64 reads and writes numeric data (integer, logical, and IEEE floating-point) as“little-endian.” Note that this conversion is not performed if the real variable is a componentof a derived type, and the whole type is being read.Example:./a.out -Wl,-T10-uUnderflow Interrupt ProcessingThe -u option controls floating point underflow interrupt processing. If the -u option isspecified, LF64 performs floating point underflow interrupt processing. The system mayoutput diagnostic message0012i-e during execution. If the -u option is omitted, the systemignores floating point underflow interrupts and continues processing. The -i option mustnot be combined with the -u option.Example:./a.out -Wl,-u-xBlanks in Numeric Formatted InputThe -x option determines whether blanks in numeric formatted input data are ignored ortreated as ZEROs. If the -x option is specified, blanks are changed to zeros during numericediting with formatted sequential input statements for which no OPEN statement has beenexecuted. The result is the same as when the BLANK= specifier in an OPEN statement is setto ZERO. If the -x option is omitted, blanks in the input field are treated as null and ignored.The result is the same as if the BLANK= specifier in an OPEN statement is set to NULL orif the BLANK= specifier is omitted.Example:./a.out -Wl,-xEnvironment Variables for Input/OutputThis section describes environment variables that control file input/output operations. Theseenvironment variables are lower-case unless otherwise indicated.fuunit = filename 00 < unit < 2147483647The fuunit environment variable pre-connects units to files. The value unit is a unit number(must be at least two digits). The value filename is a file to be connected to unit number unit.The standard input and output files (fu05 and fu06) and error file (fu00) must be avoided,unless their values have been modified using the -m, -p, or -r options, in which case thosenew values must be avoided.140 Lahey/Fujitsu Linux64 Fortran User’s Guide