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ccache.bbclass: Make it can be shared between different builds

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CCACHE_BASEDIR: ccache removes this from file path, so that hashes will be
                the same in different build dirs.

CCACHE_TOP_DIR: Set it to a shared location for different builds.

(From OE-Core rev: 35d7fe73bba15de16d2eb0a4b12ef03b57b23306)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Robert Yang
2018-12-13 17:12:41 +08:00
committed by Richard Purdie
parent 0c98ff2c31
commit e1cad77fa7
1 changed files with 21 additions and 1 deletions
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22
meta/classes/ccache.bbclass
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@@ -8,8 +8,28 @@
# 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 = "${CCACHE_DIR}/logfile.log"
# And also set PARALLEL_MAKE = "-j 1" to get make the log in order
#
export CCACHE_DIR ?= "${TMPDIR}/ccache/${MULTIMACH_TARGET_SYS}/${PN}"
# 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