warning levels. If omitted, it defaults to @option{-g
-O2}.@footnote{The @command{configure} script is itself generated from
the file @file{configure.ac}. It is only distributed in packaged
-releases of GiNaC. If you got the naked sources, e.g. from CVS, you
+releases of GiNaC. If you got the naked sources, e.g. from git, you
must generate @command{configure} along with the various
@file{Makefile.in} by using the @command{autoreconf} utility. This will
require a fair amount of support from your local toolchain, though.}
and @code{false} if it doesn't. If used in the second form, the actual
subexpressions matched by the wildcards get returned in the @code{repls}
object as a list of relations of the form @samp{wildcard == expression}.
-If @code{match()} returns false, the state of @code{repls} is undefined.
-For reproducible results, the list should be empty when passed to
-@code{match()}, but it is also possible to find similarities in multiple
-expressions by passing in the result of a previous match.
+If @code{match()} returns false, @code{repls} remains unmodified.
The matching algorithm works as follows: