Bug#908519: linux: asciidoctor dependency blocks ia64 build

[Jason Duerstock <jason.duerstock@gmail.com>]

Source: linux
Severity: normal
User: debian-ia64@lists.debian.org
Usertags: ia64

Dear Maintainer,

Due to some ruby issues, asciidoctor is currently blocking the linux
package from building on ia64.  Since asciidoctor is only used to build
the linux-perf documentation, does it make more sense to:
1) move asciidoctor into the Build-Depends-Indep: section in the control
file, or
2) flag asciidoctor as [!ia64]?

I think #1 is the correct answer, but it's entirely possible my
understanding of build dependencies is incomplete.

Thanks,

Jason


-- System Information:
Debian Release: buster/sid
  APT prefers unreleased
  APT policy: (500, 'unreleased'), (500, 'unstable')
Architecture: ia64

Kernel: Linux 4.18.0-1-mckinley (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled