Autoconf 2.50 - 2.13 problems

[Renato Golin]

Hi, i got a CVS tree from SILC.org and tryied to configure but i had some
"syntax error"s just like invalidating the syntax below:

if (foo == bar); then

else
 ...

saying:

./configure: line 5110: syntax error near unexpected token `else'
./configure: line 5110: `else'

and others...

Pekka from silc runs autoconf 2.13 and he has no problems at all... is
there some "backward incompatibility" in 2.5 with 2.13?

tnx
[]'s
Renato