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#
# Usage:
# - Enable ccache
# Add the following line to a conffile such as conf/local.conf:
# INHERIT += "ccache"
#
# - Disable ccache for a recipe
# Add the following line to the recipe if it can't be built with ccache:
# CCACHE_DISABLE = '1'
#
# - Share ccache files between different builds
# Set CCACHE_TOP_DIR to a shared dir
# CCACHE_TOP_DIR = /path/to/shared_ccache/
#
# - TO debug ccahe
# export CCACHE_DEBUG = "1"
# export CCACHE_LOGFILE = "${CCACHE_DIR}/logfile.log"
# And also set PARALLEL_MAKE = "-j 1" to get make the log in order
#
# Set it to a shared location for different builds, so that cache files can
# be shared between different builds.
CCACHE_TOP_DIR ?= "${TMPDIR}/ccache"
# ccahe removes CCACHE_BASEDIR from file path, so that hashes will be the same
# in different builds.
export CCACHE_BASEDIR ?= "${TMPDIR}"
# Used for sharing cache files after compiler is rebuilt
export CCACHE_COMPILERCHECK ?= "%compiler% -dumpspecs"
export CCACHE_DIR ?= "${CCACHE_TOP_DIR}/${MULTIMACH_TARGET_SYS}/${PN}"
# We need to stop ccache considering the current directory or the
# debug-prefix-map target directory to be significant when calculating
# its hash. Without this the cache would be invalidated every time
# ${PV} or ${PR} change.
export CCACHE_NOHASHDIR ?= "1"
python() {
"""
Enable ccache for the recipe
"""
pn = d.getVar('PN')
# quilt-native doesn't need ccache since no c files
if not (pn in ('ccache-native', 'quilt-native') or
bb.utils.to_boolean(d.getVar('CCACHE_DISABLE'))):
d.appendVar('DEPENDS', ' ccache-native')
d.setVar('CCACHE', 'ccache ')
}
addtask cleanccache after do_clean
python do_cleanccache() {
import shutil
ccache_dir = d.getVar('CCACHE_DIR')
if os.path.exists(ccache_dir):
bb.note("Removing %s" % ccache_dir)
shutil.rmtree(ccache_dir)
else:
bb.note("%s doesn't exist" % ccache_dir)
}
addtask cleanall after do_cleanccache
do_cleanccache[nostamp] = "1"
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