ENH: try if tail works with the -n +<number> syntax, if not use only
"+<number>" (GNU tail warns that this is deprecated) Alex
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@ -123,15 +123,14 @@ echo ""
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# take the archive portion of this file and pipe it to tar
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# the NUMERIC parameter in this command should be one more
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# than the number of lines in this header file
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# on SunOS there are two tails, the one in /usr/bin doesn't understand
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# the -n +<number> syntax, the one in /usr/xpg4/bin/ does
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tail_executable=tail
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if [ -x /usr/xpg4/bin/tail ]
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then
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tail_executable=/usr/xpg4/bin/tail
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fi
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# there are tails which don't understand the "-n" argument, e.g. on SunOS
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# OTOH there are tails which complain when not using the "-n" argument (e.g. GNU)
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# so at first try to tail some file to see if tail fails if used with "-n"
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# if so, don't use "-n"
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use_new_tail_syntax="-n"
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tail $use_new_tail_syntax +1 "$0" > /dev/null 2> /dev/null || use_new_tail_syntax=""
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"$tail_executable" -n +###CPACK_HEADER_LENGTH### "$0" | gunzip | (cd "${toplevel}" && tar xf -) || cpack_echo_exit "Problem unpacking the @CPACK_PACKAGE_FILE_NAME@"
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tail $use_new_tail_syntax +###CPACK_HEADER_LENGTH### "$0" | gunzip | (cd "${toplevel}" && tar xf -) || cpack_echo_exit "Problem unpacking the @CPACK_PACKAGE_FILE_NAME@"
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echo "Unpacking finished successfully"
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