f16219293a
* the CMakeLists.txt recognizes only 2 values:
IF (NOT ENABLE_COMPILE_FLAGS_FOR_TARGET)
# On a Pi this will give us armhf or arm64.
execute_process(COMMAND dpkg-architecture -qDEB_HOST_ARCH
OUTPUT_VARIABLE ENABLE_COMPILE_FLAGS_FOR_TARGET OUTPUT_STRIP_TRAILING_WHITESPACE)
endif()
message(STATUS "Platform: ${ENABLE_COMPILE_FLAGS_FOR_TARGET}")
if ("${ENABLE_COMPILE_FLAGS_FOR_TARGET}" STREQUAL "arm64")
# 64-bit binaries can be fully optimised.
add_definitions(-ftree-vectorize)
elseif ("${ENABLE_COMPILE_FLAGS_FOR_TARGET}" STREQUAL "armv8-neon")
# Only build with 32-bit Pi 3/4 specific optimisations if requested on the command line.
add_definitions(-mfpu=neon-fp-armv8 -ftree-vectorize)
endif()
the value from dpkg-architecture on host is useless
when cross-compiling, so we always need to pass something
for raspberrypi4-64 we were passing "armv8-neon" which results in:
aarch64-oe-linux-g++: error: unrecognized command-line option '-mfpu=neon-fp-armv8'
as all -mfpu options are rejected in aarch64 builds, pass better
ENABLE_COMPILE_FLAGS_FOR_TARGET value for all MACHINEs
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
meta-raspberrypi
Yocto BSP layer for the Raspberry Pi boards - http://www.raspberrypi.org/.
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Sponsored by:
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Quick links
- Git repository web frontend: https://github.com/agherzan/meta-raspberrypi
- Mailing list (yocto mailing list): yocto@lists.yoctoproject.org
- Issues management (Github Issues): https://github.com/agherzan/meta-raspberrypi/issues
- Documentation: http://meta-raspberrypi.readthedocs.io/en/latest/
Description
This is the general hardware specific BSP overlay for the RaspberryPi device.
More information can be found at: http://www.raspberrypi.org/ (Official Site)
The core BSP part of meta-raspberrypi should work with different OpenEmbedded/Yocto distributions and layer stacks, such as:
- Distro-less (only with OE-Core).
- Yoe Disto (Video and Camera Products).
- Yocto/Poky (main focus of testing).
Yocto Project Compatible Layer
This layer is officially approved as part of the Yocto Project Compatible Layers Program. You can find details of that on the official Yocto Project
website.
Dependencies
This layer depends on:
- URI: git://git.yoctoproject.org/poky
- branch: master
- revision: HEAD
Quick Start
- source poky/oe-init-build-env rpi-build
- Add this layer to bblayers.conf and the dependencies above
- Set MACHINE in local.conf to one of the supported boards
- bitbake core-image-base
- Use bmaptool to copy the generated .wic.bz2 file to the SD card
- Boot your RPI
Quick Start with kas
- Install kas build tool from PyPi (sudo pip3 install kas)
- kas build meta-raspberrypi/kas-poky-rpi.yml
- Use bmaptool to copy the generated .wic.bz2 file to the SD card
- Boot your RPI
To adjust the build configuration with specific options (I2C, SPI, ...), simply add a section as follows:
local_conf_header:
rpi-specific: |
ENABLE_I2C = "1"
RPI_EXTRA_CONFIG = "dtoverlay=pi3-disable-bt"
To configure the machine, you have to update the machine variable.
And the same for the distro.
For further information, you can read more at https://kas.readthedocs.io/en/latest/index.html
Contributing
You can send patches using the GitHub pull request process or/and through the Yocto mailing list. Refer to the documentation for more information.
Maintainers
- Andrei Gherzan
<andrei at gherzan.com>