Eric Blake <ebb9@xxxxxxx> writes:
> + /* This warning must not kill m4 -E, or it will break autoconf. */
> + if (text && strstr (text, "${"))
> + M4ERROR ((0, 0, "Warning: raw `${' in defn of %s will change semantics",
> + name));
This warning will generate a lot of false positives, right?
Most of the time, a stray ${ in an M4 file won't be followed
by a series of digits and then a }. So it will be treated
as itself (for backward compatibility).
I suggest having the warning complain only about ${X}, where X is a
string of one or more ASCII digits. It shouldn't complain about
other usages of ${. If you do it that way, you shouldn't need
to change either Autoconf or Automake.
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