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Using and Porting GNU Fortran

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10.1 Compiler Limits

g77, as with GNU tools in general, imposes few arbitrary restrictions on lengths of identifiers, number of continuation lines, number of external symbols in a program, and so on.

For example, some other Fortran compiler have an option (such as `-Nlx') to increase the limit on the number of continuation lines. Also, some Fortran compilation systems have an option (such as `-Nxx') to increase the limit on the number of external symbols.

g77, gcc, and GNU ld (the GNU linker) have no equivalent options, since they do not impose arbitrary limits in these areas.

g77 does currently limit the number of dimensions in an array to the same degree as do the Fortran standards--seven (7). This restriction might be lifted in a future version.


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