[Buildroot] [git commit] package/libcamera: add arch dependency to hardware pipelines

[Yann E. MORIN]

commit: https://git.buildroot.net/buildroot/commit/?id=6b1f3de47d1c8822ddbeaf9ea8512a5f00148ad7
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

The hardware related pipelines are obviously not available on other
architectures.

As suggested by upstream [0], add a dependency on arm or aarch64 for
RaspberryPi pipeline, to avoid the following build failure with a
powerpc64 toolchain since commit c09f126f5703 (package/libcamera: bump
to version e355ca0087cd93ef80f74c61018e9e9228a93313):

    In file included from ../include/libcamera/base/log.h:10,
                     from ../src/ipa/raspberrypi/raspberrypi.cpp:18:
    ../src/ipa/raspberrypi/raspberrypi.cpp:64:53:   in 'constexpr' expansion of 'std::chrono::operator/<long double, std::ratio<1>, double>(std::literals::chrono_literals::operator""s(1.0e+0l), 3.0e+1)'
    /home/buildroot/autobuild/instance-2/output-1/host/opt/ext-toolchain/powerpc64-buildroot-linux-gnu/include/c++/9.3.0/chrono:502:32: error: '(1.0e+0l / 3.0e+1)' is not a constant expression
      502 |  return __cd(__cd(__d).count() / __s);
    ../src/ipa/raspberrypi/raspberrypi.cpp:73:56:   in 'constexpr' expansion of 'std::chrono::operator/<long double, std::ratio<1>, double>(std::literals::chrono_literals::operator""s(1.0e+0l), 6.0e+1)'
    /home/buildroot/autobuild/instance-2/output-1/host/opt/ext-toolchain/powerpc64-buildroot-linux-gnu/include/c++/9.3.0/chrono:502:32: error: '(1.0e+0l / 6.0e+1)' is not a constant expression

Fixes:
 - http://autobuild.buildroot.org/results/49caebe7ef7e3d63de49e78d5d6839dd0aedf10c

Additionally, as Kieran puts it:

    I'd go further and filter the IPU3 on only x86 for instance, and the
    RKISP on (arm||aarch64).

So be it.

[0] https://lists.libcamera.org/pipermail/libcamera-devel/2021-October/025796.html:

Suggested-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Suggested-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
[yann.morin.1998 at free.fr: abide by Kieran's wish]
Signed-off-by: Yann E. MORIN <yann.morin.1998 at free.fr>
---
 package/libcamera/Config.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/package/libcamera/Config.in b/package/libcamera/Config.in
index 92c17df849..b7f0e5b05d 100644
--- a/package/libcamera/Config.in
+++ b/package/libcamera/Config.in
@@ -34,12 +34,14 @@ config BR2_PACKAGE_LIBCAMERA_HAS_PIPELINE
 
 config BR2_PACKAGE_LIBCAMERA_PIPELINE_IPU3
 	bool "ipu3 pipeline"
+	depends on BR2_i386 || BR2_x86_64
 	select BR2_PACKAGE_LIBCAMERA_HAS_PIPELINE
 	help
 	  Pipeline for Intel IPU3.
 
 config BR2_PACKAGE_LIBCAMERA_PIPELINE_RASPBERRYPI
 	bool "raspberrypi pipeline"
+	depends on BR2_arm || BR2_aarch64
 	depends on BR2_USE_WCHAR # boost (already enforced for gnutls)
 	select BR2_PACKAGE_BOOST
 	select BR2_PACKAGE_LIBCAMERA_HAS_PIPELINE
@@ -48,6 +50,7 @@ config BR2_PACKAGE_LIBCAMERA_PIPELINE_RASPBERRYPI
 
 config BR2_PACKAGE_LIBCAMERA_PIPELINE_RKISP1
 	bool "rkisp1 pipeline"
+	depends on BR2_arm || BR2_aarch64
 	select BR2_PACKAGE_LIBCAMERA_HAS_PIPELINE
 	help
 	  Pipeline for Rockchip ISP1.