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<DT><SAMP>‘--extract-all’</SAMP>
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This option has an effect with most languages, namely C, C++, ObjectiveC,
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Shell, Python, Lisp, EmacsLisp, librep, Java, C#, awk, Tcl, Perl, PHP,
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<DT><SAMP>‘--keyword[=<VAR>keywordspec</VAR>]’</SAMP>
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If <VAR>keywordspec</VAR> is a C identifier <VAR>id</VAR>, <CODE>xgettext</CODE> looks
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for strings in the first argument of each call to the function or macro
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<VAR>id</VAR>. If <VAR>keywordspec</VAR> is of the form