Straight Build

If you have a recent version of gcc already installed on your system, and if you're reasonably certain it produces code that is object-compatible with the version of gcc you want to build as part of building g77, you can save time and disk space by doing a straight build.

To build just the C and Fortran compilers and the necessary run-time libraries, issue the following command:

make -k CC=gcc LANGUAGES=f77 all g77

(The `g77' target is necessary because the gcc build procedures apparently do not automatically build command drivers for languages in subdirectories. It's the `all' target that triggers building everything except, apparently, the g77 command itself.)

If you run into problems using this method, you have two options:

• Abandon this approach and do a bootstrap build.
• Try to make this approach work by diagnosing the problems you're running into and retrying.

Especially if you do the latter, you might consider submitting any solutions as bug/fix reports. See section Known Causes of Trouble with GNU Fortran.

However, understand that many problems preventing a straight build from working are not g77 problems, and, in such cases, are not likely to be addressed in future versions of g77.

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