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* this means that recipes with ARM_INSTRUCTION_SET explicitly changed to arm will be built in feed without thumb suffix, the same does apply for workdir, e.g. after "bitbake glib-2.0" you can see: tmp-glibc/work/armv5e-oe-linux-gnueabi: glib-2.0 glibc glibc-initial tmp-glibc/work/armv5te-oe-linux-gnueabi: acl db gdk-pixbuf kmod .... and tmp-glibc/deploy/ipk: all armv5e armv5te qemuarm * feed config should be ok, because all default DEFAULTTUNEs always include "arm" variants of all supported PACKAGE_ARCHs * for more details see http://lists.openembedded.org/pipermail/openembedded-core/2014-April/091960.html the toolchain path issues were resolved in 1.8 * add ARM_INSTRUCTION_SET = "arm" to glibc-collateral.inc and comment in glibc.inc to fix glibc-locale and glibc-scripts build (From OE-Core rev: 3e760031f91fb87c3e2f62b77a117eb41164f259) Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
50 lines
3.0 KiB
HTML
50 lines
3.0 KiB
HTML
# The instruction set the compiler should use when generating application
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# code. The kernel is always compiled with arm code at present. arm code
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# is the original 32 bit ARM instruction set, thumb code is the 16 bit
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# encoded RISC sub-set. Thumb code is smaller (maybe 70% of the ARM size)
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# but requires more instructions (140% for 70% smaller code) so may be
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# slower.
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TUNEVALID[thumb] = "Use thumb instructions instead of ARM"
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ARM_THUMB_OPT = "${@['arm', 'thumb'][d.getVar('ARM_INSTRUCTION_SET', True) == 'thumb']}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv4', 't', '', d)}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv5', 't', '', d)}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv6', 't', '', d)}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv7a', 't2', '', d)}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv7r', 't2', '', d)}"
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ARM_THUMB_SUFFIX .= "${@bb.utils.contains('TUNE_FEATURES', 'armv7m', 't2', '', d)}"
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# If the device supports ARM, then respect ARM_THUMB_OPT (which can be "arm" or "thumb")
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# If the defice doesn't support ARM, then always set "thumb" even when
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# some recipe explicitly sets ARM_INSTRUCTION_SET to "arm"
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ARM_M_OPT = "${@bb.utils.contains('TUNE_FEATURES', 'arm', '${ARM_THUMB_OPT}', 'thumb', d)}"
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python () {
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if bb.utils.contains('TUNE_FEATURES', 'thumb', 'False', 'True', d):
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return
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selected = d.getVar('ARM_INSTRUCTION_SET', True)
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if selected == None:
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return
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used = d.getVar('ARM_M_OPT', True)
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if selected != used:
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pn = d.getVar('PN', True)
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bb.warn("Recipe '%s' selects ARM_INSTRUCTION_SET to be '%s', but tune configuration overrides it to '%s'" % (pn, selected, used))
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}
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TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', ' -m${ARM_M_OPT}', '', d)}"
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OVERRIDES .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', ':thumb', '', d)}"
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# Add suffix from ARM_THUMB_SUFFIX only if after all this we still set ARM_M_OPT to thumb
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ARMPKGSFX_THUMB .= "${@ d.getVar('ARM_THUMB_SUFFIX', True) if d.getVar('ARM_M_OPT', True) == 'thumb' else ''}"
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# Whether to compile with code to allow interworking between the two
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# instruction sets. This allows thumb code to be executed on a primarily
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# arm system and vice versa. It is strongly recommended that DISTROs not
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# turn this off - the actual cost is very small.
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TUNEVALID[no-thumb-interwork] = "Disable mixing of thumb and ARM functions"
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THUMB_TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'no-thumb-interwork', ' -mno-thumb-interwork', ' -mthumb-interwork', d)}"
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THUMB_OVERRIDES .= "${@bb.utils.contains('TUNE_FEATURES', 'no-thumb-interwork', ':thumb-interwork', '', d)}"
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TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', ' ${THUMB_TUNE_CCARGS}', '', d)}"
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OVERRIDES .= "${@bb.utils.contains('TUNE_FEATURES', 'thumb', '${THUMB_OVERRIDES}', '', d)}"
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# what about armv7m devices which don't support -marm (e.g. Cortex-M3)?
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TARGET_CC_KERNEL_ARCH += "${@bb.utils.contains('TUNE_FEATURES', 'thumb', '-mno-thumb-interwork -marm', '', d)}"
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