Re: [Qemu-devel] [PATCH v3 1/3] util: remove redundant include of glib.h and add osdep.h

[Eric Blake]

On 06/08/2018 08:16 AM, Daniel P. Berrangé wrote:
> Code must only ever include glib.h indirectly via the glib-compat.h
> header file, because we will need some macros set before glib.h is
> pulled in. Adding extra includes of glib.h will (soon) cause compile
> failures such as:
>
> In file included from /home/berrange/src/virt/qemu/include/qemu/osdep.h:107,
>                   from /home/berrange/src/virt/qemu/include/qemu/iova-tree.h:26,
>                   from util/iova-tree.c:13:
> /home/berrange/src/virt/qemu/include/glib-compat.h:22: error: 
> "GLIB_VERSION_MIN_REQUIRED" redefined [-Werror]
>   #define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_40
>
> In file included from /usr/include/glib-2.0/glib/gtypes.h:34,
>                   from /usr/include/glib-2.0/glib/galloca.h:32,
>                   from /usr/include/glib-2.0/glib.h:30,
>                   from util/iova-tree.c:12:
> /usr/include/glib-2.0/glib/gversionmacros.h:237: note: this is the location of 
> the previous definition
>   # define GLIB_VERSION_MIN_REQUIRED      (GLIB_VERSION_CUR_STABLE)
>
> Furthermore, the osdep.h include should always be done directly from the
> .c file rather than indirectly via any .h file.
>
> Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
> Signed-off-by: Daniel P. Berrangé <address@hidden>
> ---

Reviewed-by: Eric Blake <address@hidden>

--
Eric Blake, Principal Software Engineer
Red Hat, Inc.           +1-919-301-3266
Virtualization:  qemu.org | libvirt.org