Bug#917676: hkl: FTBFS: ../../hkl/ccan/generator/generator.h:23:2: error: #error Generators require coroutines

[Lucas Nussbaum]

Source: hkl
Version: 5.0.0.2449-2
Severity: serious
Justification: FTBFS on amd64
Tags: buster sid
Usertags: ftbfs-20181229 ftbfs-buster

Hi,

During a rebuild of all packages in sid, your package failed to build
on amd64.

Relevant part (hopefully):
> /bin/bash ../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../..   -Wdate-time -D_FORTIFY_SOURCE=2 -I../.. -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -c -o generator/generator.lo generator/generator.c
> libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../.. -Wdate-time -D_FORTIFY_SOURCE=2 -I../.. -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -c generator/generator.c  -fPIC -DPIC -o generator/.libs/generator.o
> In file included from generator/generator.c:8:
> ../../hkl/ccan/generator/generator.h:23:2: error: #error Generators require coroutines
>  #error Generators require coroutines
>   ^~~~~
> make[5]: *** [Makefile:605: generator/generator.lo] Error 1

The full build log is available from:
   http://aws-logs.debian.net/2018/12/29/hkl_5.0.0.2449-2_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

About the archive rebuild: The rebuild was done on EC2 VM instances from
Amazon Web Services, using a clean, minimal and up-to-date chroot. Every
failed build was retried once to eliminate random failures.