![]() Mixed-case entry point names cannot be linked with Fortran object files. Other languages, such as C, permit mixed-case input, and therefore can have mixed-case entry-point names in their object files. The only visible result of this policy is that the names of external procedures are always in lowercase when they are recorded in the object file. This is the same in Fortran 90 and Fortran 77. SGI Fortran compilers remove the difference between lowercase and uppercase by converting all input text (except for literal character constants) to lowercase before processing it. ![]() Letter case is ignored in Fortran source input. No Fortran 77 compiler supports Fortran 90 style free-form source, so do not use it for any module that must be backward-compatible. MIPSpro Fortran 90 extends the Fortran 90 standard by accepting up to 99 continuation lines. Since MIPSpro Fortran 90 supports only 8-bit ASCII characters (see “Character Values and Literals”), there is no question of overflowing the maximum source line length due to nondefault character literals (section 3.3.1 in the MIPSpro Fortran 90 Handbook). Fortran 90 assumes -freeform for input files with the suffix. Specify -freeform to force an input file to be treated as free-form source. ![]() (See “Specifying Source File Format”.)įortran 90 supports free-form source input. If you specify neither, Fortran 90 expects any source file with the suffix. Specify either the -col72 (or -fixedform) option, or the -col120 option. Fortran 77 supports two source formats, 72-column and 120-column. ![]()
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