mirrors/poky

mirror of https://git.yoctoproject.org/poky synced 2026-05-08 05:09:24 +00:00

T

Khem Raj 47594d59ec cmake.bbclass: Set CXXFLAGS and CFLAGS

We strip the TOOLCHAIN_OPTIONS and HOST_CC_ARCH from CC/CXX in cmake.bbclass
whereas CFLAFS and CXXFLAGS assume that TOOLCHAIN_OPTIONS are
part of CC/CXX variables, this causes compile failures when cmake
is running compiler tests during configure on some architectures
especially armhf, because hf ABI information -mfloat-abi is part
of TOOLCHAIN_OPTIONS, so what happens is that testcase gets compiled
without hard-float, howver, during linking the float ABI option
is passed via LDFLAGS, now linker rejects this and fails like
/mnt/a/build/tmp-glibc/sysroots/x86_64-linux/usr/libexec/arm-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/6.2.0/ld: error: cmTC_27947 uses VFP register arguments, CMakeFiles/cmTC_27947.dir/src.cxx.o does not
mnt/a/build/tmp-glibc/sysroots/x86_64-linux/usr/libexec/arm-oe-linux-gnueabi/gcc/arm-oe-linux-gnueabi/6.2.0/ld: failed to merge target specific data of file CMakeFiles/cmTC_27947.dir/src.cxx.o
collect2: error: ld returned 1 exit status

This means that CMake now fails the configure time test too
which is not right, e.g. it might disable features which actually do exist
and should be enabled e.g. in case above it is resulting as below

Performing C++ SOURCE FILE Test HAS_BUILTIN_SYNC_SUB_AND_FETCH failed with the following output:

Its actually a bug in CMake see
https://gitlab.kitware.com/cmake/cmake/issues/16421

CMake is ignoring CMAKE_CXX_FLAGS when using CHECK_CXX_SOURCE_COMPILES
function.

Until it is fixed upstream, we add HOST_CC_ARCH and TOOLCHAIN_OPTIONS
to CFLAGS and CXXFLAGS, so that we can ensure that compiler invocation
remains consistent.

(From OE-Core rev: 826f3cdb474b5728b22f08d2342fc90235ca9e7d)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2016-11-23 11:10:12 +00:00

bitbake

bitbake: COW.py: fix sample codes

2016-11-23 10:59:56 +00:00

documentation

documentation: Updates to support developing 2.3 YP docs

2016-11-16 10:38:42 +00:00

README

Poky
====

Poky is an integration of various components to form a complete prepackaged
build system and development environment. It features support for building
customised embedded device style images. There are reference demo images
featuring a X11/Matchbox/GTK themed UI called Sato. The system supports
cross-architecture application development using QEMU emulation and a
standalone toolchain and SDK with IDE integration.

Additional information on the specifics of hardware that Poky supports
is available in README.hardware. Further hardware support can easily be added
in the form of layers which extend the systems capabilities in a modular way.

As an integration layer Poky consists of several upstream projects such as 
BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information 
e.g. for the hardware support. Poky is in turn a component of the Yocto Project.

The Yocto Project has extensive documentation about the system including a 
reference manual which can be found at:
    http://yoctoproject.org/documentation

OpenEmbedded-Core is a layer containing the core metadata for current versions
of OpenEmbedded. It is distro-less (can build a functional image with
DISTRO = "nodistro") and contains only emulated machine support.

For information about OpenEmbedded, see the OpenEmbedded website:
    http://www.openembedded.org/

Where to Send Patches
=====================

As Poky is an integration repository (built using a tool called combo-layer),
patches against the various components should be sent to their respective
upstreams:

bitbake:
    Git repository: http://git.openembedded.org/bitbake/
    Mailing list: bitbake-devel@lists.openembedded.org

documentation:
    Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/
    Mailing list: yocto@yoctoproject.org

meta-poky, meta-yocto-bsp:
    Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp)
    Mailing list: poky@yoctoproject.org

Everything else should be sent to the OpenEmbedded Core mailing list.  If in
doubt, check the oe-core git repository for the content you intend to modify.
Before sending, be sure the patches apply cleanly to the current oe-core git
repository.

    Git repository: http://git.openembedded.org/openembedded-core/
    Mailing list: openembedded-core@lists.openembedded.org

Note: The scripts directory should be treated with extra care as it is a mix of
oe-core and poky-specific files.