path: root/meta/lib/oe/
diff options
authorRobert Yang <>2018-12-07 02:55:29 (GMT)
committerRichard Purdie <>2019-01-14 11:35:55 (GMT)
commit0c98ff2c31d462ea139ebf1a3e0dbd97088d5466 (patch)
tree34f52ca5fdc645585ee8f4a5ded9dc0273a00271 /meta/lib/oe/
parent87413eb34a810f3c267f1185a4f2af211838530f (diff)
ccache.bbclass: Refactor it to make it more reliable
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 <> Signed-off-by: Richard Purdie <>
Diffstat (limited to 'meta/lib/oe/')
1 files changed, 3 insertions, 0 deletions
diff --git a/meta/lib/oe/ b/meta/lib/oe/
index 29b4115..ee6f0e6 100644
--- a/meta/lib/oe/
+++ b/meta/lib/oe/
@@ -363,6 +363,9 @@ def host_gcc_version(d, taskcontextonly=False):
363 return 363 return
364 364
365 compiler = d.getVar("BUILD_CC") 365 compiler = d.getVar("BUILD_CC")
366 # Get rid of ccache since it is not present when parsing.
367 if compiler.startswith('ccache '):
368 compiler = compiler[7:]
366 try: 369 try:
367 env = os.environ.copy() 370 env = os.environ.copy()
368 env["PATH"] = d.getVar("PATH") 371 env["PATH"] = d.getVar("PATH")