[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Adam Duskett]

Hey Baruch! Thanks so much for emailing back!

On Wed, Feb 7, 2018 at 11:43 PM, Baruch Siach <baruch at tkos.co.il> wrote:
> Hi Adam,
>
> Thanks for working on this hard problem.
>
Thanks! I must admit this isn't for completely selfless reasons.  I
want to use the gstreamer-python
bindings for a product I am working on, but alas it uses
gobject-intropsection. :)


> On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote:
>> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
>> new file mode 100644
>> index 0000000000..42f58c8c0e
>> --- /dev/null
>> +++ b/package/gobject-introspection/Config.in
>> @@ -0,0 +1,34 @@
>> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
>> +     bool "gobject-introspection"
>> +     depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
>> +     depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
>> +     depends on BR2_TOOLCHAIN_USES_GLIBC
>> +     depends on BR2_USE_MMU # python3, libglib2
>> +     depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
>> +     depends on !BR2_STATIC_LIBS
>> +     depends on !BR2_MIPS_NABI32
>> +     depends on BR2_LINUX_KERNEL # qemu-host
>
> So the target board (not only architecture) must be one that qemu emulates.
> This is a pretty big limitation. Since GI does not require any specific
> hardware, would it be possible to use the qemu user space emulator[1] instead?
>
Good catch! I am using the qemu-userspace!

The only reason I am required BR2_LINUX_KERNEL is because I am using
$(LINUX_VERSION) in gobject-introspection.mk here:
$(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g"

which get's turned into:
PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu-x86_64 -r 3.10 -L ...

So a question then: Is there a variable I could use to use the toolchains
kernel header version instead? That would be an ideal solution in this
instance.

> [1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator
>
> baruch
>
> --
>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -