Re: fewer forks in AC_DEFINE

[Eric Blake]

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According to Ralf Wildenhues on 11/20/2008 11:47 AM:
> What if there are already too many '('?  Will it loop endlessly and fill
> RAM with more '('?

In that case, argument collection for _m4_expand will consume text beyond
the m4_expand(foo) that sparked the extra '(', and you will likely end up
consuming all input until you get a cryptic "_m4_expand_: end of file in
argument list" message, and containing the line number where the m4_expand
started (if your m4 is >= 1.4.6).  But it doesn't infloop, and probably
won't run out of memory (depending on how much input there is left to
consume).  Thankfully, unbalanced '(' are somewhat more rare, especially
in shell code ;)

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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