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authorRichard Purdie <richard.purdie@linuxfoundation.org>2025-11-07 13:31:53 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2025-11-07 13:31:53 +0000
commit8c22ff0d8b70d9b12f0487ef696a7e915b9e3173 (patch)
treeefdc32587159d0050a69009bdf2330a531727d95 /meta/conf/machine/include/arm/README
parentd412d2747595c1cc4a5e3ca975e3adc31b2f7891 (diff)
downloadpoky-8c22ff0d8b70d9b12f0487ef696a7e915b9e3173.tar.gz
The poky repository master branch is no longer being updated.
You can either: a) switch to individual clones of bitbake, openembedded-core, meta-yocto and yocto-docs b) use the new bitbake-setup You can find information about either approach in our documentation: https://docs.yoctoproject.org/ Note that "poky" the distro setting is still available in meta-yocto as before and we continue to use and maintain that. Long live Poky! Some further information on the background of this change can be found in: https://lists.openembedded.org/g/openembedded-architecture/message/2179 Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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12012/03/30 - Mark Hatle <mark.hatle@windriver.com>
2 - Initial Revision
3
4The ARM architecture definitions are split among a number of files.
5The primary definitions for the variables are handled by the core
6arch-arm.inc file.
7
8TUNE_ARCH is set to either "arm" or "armeb" depending on the value
9of the existence of the "bigendian" feature in a given tune.
10
11A small set of ARM specific variables have been defined to allow
12TUNE_PKGARCH to be automatically defined. Optimized tunings must NOT
13change the definiton of TUNE_PKGARCH. TUNE_PKGACH:tune-<tune> will be
14ignored. The format of the package arch is enforced by the TUNE_PKGARCH
15default. The format must be of the form:
16<armversion>[t][e][hf][b][-vfp][-neon]
17
18TUNE_PKGARCH is defined as:
19${ARMPKGARCH}${ARMPKGSFX_THUMB}${ARMPKGSFX_DSP}${ARMPKGSFX_EABI}${ARMPKGSFX_ENDIAN}${ARMPKGSFX_FPU}
20
21ARMPKGARCH - This is the core package arch component specified by each
22tuning. This is the primary identifier of a tuning. Usual values are:
23arm, armv4, armv5, armv6, armv7a, etc.
24
25ARMPKGSFX_THUMB - This is the thumb specific suffix. Curently it is
26defined in feature-arm-thumb.inc.
27
28ARMPKGSFX_DSP - This is the DSP specific suffix. Currently this is set
29to 'e' when on armv5 and the dsp feature is enabled.
30
31ARMPKGSFX_EABI - This is the eabi specific suffix. There are currently
32two defined ABIs specificed, standard EABI and Hard Float (VFP) EABI.
33When the callconvention-hard is enabled, "hf" is specified, otherwise it
34is blank.
35
36ARMPKGSFX_ENDIAN - This is the endian specific suffix. It is defined in
37the core arch-arm.inc file.
38
39ARMPKGSFX_FPU - This is the FPU specific suffix. The suffix indicates
40specific FPU optimizations. 'vfp' and 'neon' are both defined.