[Buildroot] [PATCH] package/uhd: fix build with riscV

[Thomas Petazzoni]

On Tue, 12 Jan 2021 07:30:27 +0100
Gwenhael Goavec-Merou <gwenj at trabucayre.com> wrote:

> From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
> 
> When the target CPU is riscV, msgpack is unable to detect endianness with a list of errors like:
> 
> uhd/host/lib/deps/rpclib/include/rpc/msgpack/pack.hpp:190:2: error: #error msgpack-c supports only big endian and little endian
>   190 | #error msgpack-c supports only big endian and little endian
>       |  ^~~~~
> 
> and with subsequent errors:
> 
> uhd0/host/lib/deps/rpclib/include/rpc/msgpack/pack.hpp:236:46: error: there are no arguments to 'take8_8' that depend on a template parameter, so a declaration of 'take8_8' must be available [-fpermissive]
>   236 |     char buf[2] = {static_cast<char>(0xccu), take8_8(d)};
>       |
> 
> This is due to a missing support for this architecture in msgpack.
> This patch adapt commit from https://github.com/boostorg/predef
> 
> [backported from https://github.com/EttusResearch/uhd/pull/400]
> 
> Fix:
> - http://autobuild.buildroot.net/results/afacf5c5c2cd9dff6962523f1fdded9b474b9d66/
> - http://autobuild.buildroot.net/results/91530538d630a7f09d85327e514f01b45253c1a6/
> - http://autobuild.buildroot.net/results/91530538d630a7f09d85327e514f01b45253c1a6/
> - and others
> 
> Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
> ---
>  .../0003-add-RISC-V-endian-detection.patch    | 113 ++++++++++++++++++
>  1 file changed, 113 insertions(+)
>  create mode 100644 package/uhd/0003-add-RISC-V-endian-detection.patch

Applied to master, thanks.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com