Re: Way to determine autotools dependencies automatically?

[Reuben Thomas]

On 18 March 2011 21:03, Eric Blake <address@hidden> wrote:
> On 03/18/2011 02:58 PM, Reuben Thomas wrote:
>> On 18 March 2011 20:56, Eric Blake <address@hidden> wrote:
>>> On 03/18/2011 02:53 PM, Reuben Thomas wrote:
>>>> Just now doing a git merge I caught sight of an AC_PREREQ line in one
>>>> .m4 file. Is there a built-in way to extract the required versions of
>>>> autoconf, automake &c. from an autotools build system? (I can't find
>>>> an answer, but there's an awful lot of cool undocumented stuff in
>>>> there at present.)
>>>
>>> autoconf --trace AC_PREREQ
>>>
>>> and look through that for the largest number.
>
> As a note of caution, note that just inspecting trace output might not
> tell you the whole story.  If you use automake 1.11, you will get an
> AC_PREREQ of autoconf 2.62 from AM_INIT_AUTOMAKE.  But gnulib can be
> used with anything as old as autoconf 2.59, provided you are also using
> an older automake to go with it (and once you do switch to an older
> automake, you will no longer see the AC_PREREQ 2.62 in the trace).

That was timely, I made exactly that mistake, and since there was
quite a gap between 2.61 & 2.62, I guess it's worth fixing the minimum
in my INSTALL file. Thanks!

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