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(g77-295.info)Invoking G77

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GNU Fortran Command Options
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   The `g77' command supports all the options supported by the `gcc'
command.  Note: GNU CC Command Options, for
information on the non-Fortran-specific aspects of the `gcc' command
(and, therefore, the `g77' command).

   All `gcc' and `g77' options are accepted both by `g77' and by `gcc'
(as well as any other drivers built at the same time, such as `g++'),
since adding `g77' to the `gcc' distribution enables acceptance of
`g77'-specific options by all of the relevant drivers.

   In some cases, options have positive and negative forms; the
negative form of `-ffoo' would be `-fno-foo'.  This manual documents
only one of these two forms, whichever one is not the default.

Option Summary

Brief list of all `g77' options,

without explanations.

Overall Options

Controlling the kind of output:

an executable, object files, assembler files, or preprocessed source.

Shorthand Options

Options that are shorthand for other options.

Fortran Dialect Options

Controlling the variant of Fortran language

compiled.

Warning Options

How picky should the compiler be?

Debugging Options

Symbol tables, measurements, and debugging dumps.

Optimize Options

How much optimization?

Preprocessor Options

Controlling header files and macro definitions.

Also, getting dependency information for Make.

Directory Options

Where to find header files and libraries.

Where to find the compiler executable files.

Code Gen Options

Specifying conventions for function calls, data layout

and register usage.

Environment Variables

Env vars that affect GNU Fortran.