Bug#933336: lxqt-config: FTBFS on hurd-i386: udev not available

Hi!

On Mon, 2019-07-29 at 13:49:45 +0200, Paul Sonnenschein wrote:
> Package: lxqt-config
> Severity: important
> Version: 0.14.1-2
> Tags: patch
> User: [email protected]
> Usertags: hurd
> 
> the package lxqt-config fails to build from source on hurd-i386 because
> udev is not available on non-linux (on kfreebsd-any, it is in state BD-
> Uninstallable).

> diff --git a/debian/rules b/debian/rules
> index 4f7c70d..81335e7 100755
> --- a/debian/rules
> +++ b/debian/rules
> @@ -5,6 +5,12 @@ export LC_ALL=C.UTF-8
>  export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
>  export DEB_BUILD_MAINT_OPTIONS = hardening=+all
>  
> +WHICH_OS := $(shell dpkg-architecture -qDEB_HOST_ARCH_OS 2>/dev/null)

The usual convention is to use the same name as the queried variable,
so «DEB_HOST_ARCH_OS = ...», but I think even better would be to just
do «include /usr/share/dpkg/architecture.mk» and then just use the
needed variables lazily defined there.

> +ifneq  ($(WHICH_OS), linux)
> +    NOT_LINUX := -DWITH_TOUCHPAD=NO
> +endif

To make this variable reusable, I'd probably give it a system agnostic
name, I tend to use something like:

  confflags += -DWITH_TOUCHPAD=NO

so that it can be extended, w/o rendering the name invalid.

Thanks,
Guillem