Re: Conditional AC_CHECK_HEADER

[Russ Allbery]

Florian Weimer <fweimer@redhat.com> writes:

> I want to submit this upstream.  Is there are some explanation somewhere
> why it's not permitted to invoke AC_CHECK_HEADER under shell conditional
> statement?  I couldn't find it in the manual.

It's documented under AS_IF:

https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.71/html_node/Common-Shell-Constructs.html#index-AS_005fIF-1

The principle that one should always use an AS_* construct if one exists
rather than regular shell constructs could probably be documented more
aggressively.

-- 
Russ Allbery (eagle@eyrie.org)             <https://www.eyrie.org/~eagle/>