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0c98ff2c31
The previous ccache.bbclass has the following problems:
- It uses host's ccache for native recipes, but this may not work on some
hosts, for example, it nerver works on my Ubuntu 14.04.4, there are always
build failures (m4-native failed at do_configure, and others will also be
failed if I disable CCACHE for m4-native)
- native/nativesdk/cross/crosssdk recipes use host's ccache, but target uses
ccache-native, this may confuse user.
- The target recipes may use both host's ccache and ccache-native, this may
cause unexpected problems and be hard to debug. This is because ccache-native is
in SIGGEN_EXCLUDE_SAFE_RECIPE_DEPS, so ccache-native may not be present when
rebuild target recipes, and then it would use hosttools/ccache, but the
previous ccache files were generated by ccache-native.
- Target recipes can't use ccache when no ccache is installed on the host:
CCACHE = "${@bb.utils.which(d.getVar('PATH'), 'ccache') and 'ccache '}"
After refactored:
All types recipes (native, target and others) will use ccache-native except
ccache-native itself, host's cache won't be used any more. It is more
reliable now, which will work everywhere when ccache-native can be built.
And now we need use "CCACHE_DISABLE = '1'" to disable ccache for the recipe
rather than "CCACHE = ''" since we set CCACHE in anonymous function, and
d.getVar('CCACHE') works after "CCACHE ??=" which is set in bitbake.conf, so we
can't check whether CCACHE is set or not in anonymous function since it is
always set. Use CCACHE_DISABLE to disable it would be more clear.
(From OE-Core rev: b25271b65262f70d849a4861da216c9be6c54d53)
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
31 lines
934 B
Plaintext
31 lines
934 B
Plaintext
#
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# Usage:
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# - Enable ccache
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# Add the following line to a conffile such as conf/local.conf:
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# INHERIT += "ccache"
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#
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# - Disable ccache for a recipe
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# Add the following line to the recipe if it can't be built with ccache:
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# CCACHE_DISABLE = '1'
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#
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export CCACHE_DIR ?= "${TMPDIR}/ccache/${MULTIMACH_TARGET_SYS}/${PN}"
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# We need to stop ccache considering the current directory or the
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# debug-prefix-map target directory to be significant when calculating
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# its hash. Without this the cache would be invalidated every time
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# ${PV} or ${PR} change.
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export CCACHE_NOHASHDIR ?= "1"
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python() {
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"""
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Enable ccache for the recipe
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"""
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pn = d.getVar('PN')
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# quilt-native doesn't need ccache since no c files
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if not (pn in ('ccache-native', 'quilt-native') or
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bb.utils.to_boolean(d.getVar('CCACHE_DISABLE'))):
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d.appendVar('DEPENDS', ' ccache-native')
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d.setVar('CCACHE', 'ccache ')
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}
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