What do these variables with 'at symbols' in Makefiles mean?

Posted by Sam on Stack Overflow See other posts from Stack Overflow or by Sam
Published on 2010-04-27T01:30:46Z Indexed on 2010/04/27 1:43 UTC
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makefile

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autoconf

I couldn't find any documentation on this. What exactly are these variables with 'at' symbols found in Makefiles? Example:

temp = @temp@
srcdir = @srcdir@

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