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* The @<file> syntax cannot be used inside the file being parsed.
The second point is actually not true; DJ asked that I make it support
recursion.
@item @@@var{file} Read command-line options from @var{file}. The options read are inserted in place of the original @@@var{file} option. If @var{file} does not exist, or cannot be read, then the option will be treated literally, and not removed.
Options in @var{file} are separated by whitespace. A whitespace character may be included in an option by surrounding the entire option in either single or double quotes. Any character (including a backslash) may be included by prefixing the character to be included character with a backslash. The @var{file} may itself contain additional @@@var{file} options; any such options will be processed recursively.
--extra-switches-from-file=<file>
If we do it, I think we should do that in the existing expandargv. That will ensure it's consistent across all programs which use expandargv, which seems like a good thing.
Cheers Nick
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