Re: Question on AC_PREREQ

[Ben Pfaff]

Noah Misch <address@hidden> writes:

> On Mon, Dec 10, 2007 at 05:46:30AM +0100, Sebastian Pipping wrote:
>> I am running Autoconf 2.61a here. I want to add a version
>> guard to my configure.in and surprisingly adding
>> 
>>    AC_PREREQ(2.61b)
>> 
>> gives an error (from aclocal already) as expected
>> but
>> 
>>    AC_PREREQ(2.7)
>
> AC_PREREQ uses GNU `strverscmp'-style comparisons.
> Essentially, the version is two dot-separated integers with an
> optional trailing letter.  Therefore, 2.61 > 2.10 > 2.9 > 2.7.

And therefore one would expect that AC_PREREQ(2.7) would succeed
under Autoconf 2.61a.  In fact, it does succeed when I test it on
my machine here.  The OP implies that it fails on his machine.  I
don't know why it would, though.
-- 
Ben Pfaff 
http://benpfaff.org