[Reproducible-builds] Bug#806331: [xz-devel] Re: xz-utils: make the selected POSIX shell stable accross build environments

[Thorsten Glaser]

Ximin Luo dixit:

>needs to more clearly distinguish between the build and the host
>environment - like how compilers do. So for example, here the "most
>correct" solution would be to add a HOST_POSIX_SHELL and default this

No, this is outside of the scope of autotools and a common misuse
of them actually.

The real bug here is that the configure.ac script of the package
hardcodes POSIX_SHELL in the output while your reproducible builds
effort treats this as a(n unsupported, at least in this scenario)
cross compilation.

The same issue would happen when you set CONFIG_SHELL=/bin/bash
and then cross-compile xz-utils from GNU/Linux to, say, MirBSD,
where There Is No Such Thing As /bin/bash.

So the root of the problem is that xz-utils is not cross-compilable
(well, not completely, and enough for Helmut’s bootstrapping effort).

bye,
//mirabilos
-- 
Yay for having to rewrite other people's Bash scripts because bash
suddenly stopped supporting the bash extensions they make use of
	-- Tonnerre Lombard in #nosec