noisy gnulib-tool on IRIX

[Eric Blake]

$ ./gnulib-tool --help 2>&1 | head -n3
alias: Not found
unalias: Not found
Usage: gnulib-tool --list

Using a more detailed trace, I see:

> # Because of this, we have to play strange tricks with have_echo, to ensure
> # that the top-level statement containing the test starts after the 'alias'
> # command.
> if test -z "$have_echo"; then
> bsd_echo ()
> {
> cat <<EOF
> $*
> EOF
> }
> alias echo=bsd_echo 2>/dev/null
> fi
> + test -z
> + alias echo=bsd_echo
> alias: Not found

But I haven't yet tried to disentangle the echo-setting logic of 
gnulib-tool for a correct tweak that avoids echo on IRIX's /bin/sh, 
without using unsupported [un]alias.  And unfortunately, the IRIX 
/bin/sh lacks printf (and print), and interprets backslashes passed to 
echo by default, so on that platform, sane printing requires forking of 
external processes (cat or printf).

--
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org