[inn-current] -D_GNU_SOURCE missing in 'configure' for Linux

[Russ Allbery]

Christophe Wolfhugel <wolf at oleane.net> writes:

> 'configure' is not finding the declaration of pread :

> checking whether pread is declared... no
> checking for pread... yes

> It will then be declared in clibrary.h with the 64-bit off_t :

> extern ssize_t          pread(int, void *, size_t, off_t);

> But a "strace" of the process still shows that the 32-bit pread is
> being used.

Ahh... now I understand.  That makes sense.  I'll go fiddle with
configure.ac to make sure that it adds _GNU_SOURCE.  I'm trying to
remember why it was that Autoconf didn't do this automatically.  I think
it was because of the side effects, but we already fixed that in INN a
long time back.

-- 
Russ Allbery (rra at stanford.edu)             <http://www.eyrie.org/~eagle/>

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