Re: linux-ppc harfbuzz GUB build error

[Masamichi Hosoda]

>>> New build from Masamichi’s branch passed the linux ppc harfbuzz, so the ICU 
>>> patch worked. Now looking into a breaking freebsd-x86 lilypond error: 
>> 
>> Would you show me the whole log file?
> Went into a bit of experimentation afterwards, still failed attempts only, 
> after discovering that the message is basically a side-effect of 
> set -u
> combined with autoconf apparently trying to use unbound variable CONFIG_SHELL
> 
> On a cleanly booted docker-image recreated the issue with 
> bin/gub freebsd-x86::lilypond 

In my environments, autoconf does not raise such error.
Do you set the "set -u" or "set -o nounset" somewhere?
If so, would you remove the setting?