linux/poky.git/meta/classes/ccache.bbclass, branch master

The poky repository master branch is no longer being updated.

2025-11-07T13:31:53+00:00

You can either: a) switch to individual clones of bitbake, openembedded-core, meta-yocto and yocto-docs b) use the new bitbake-setup You can find information about either approach in our documentation: https://docs.yoctoproject.org/ Note that "poky" the distro setting is still available in meta-yocto as before and we continue to use and maintain that. Long live Poky! Some further information on the background of this change can be found in: https://lists.openembedded.org/g/openembedded-architecture/message/2179 Signed-off-by: Richard Purdie

ccache: do not use ccache if it is explicitly forbidden

2025-08-11T17:04:25+00:00

Some recipes explicitly disable ccache via CCACHE_DISABLE variable since they are known issues with ccache in those recipes. This setting should not be ignored also when ccache in in HOSTOOLS. Rework a hard to read if clause so that it is in format if (not CCACHE_DISABLE and (cond1 or cond2 or cond2)): (From OE-Core rev: 2ea0f82e5f9bb21d21503ed06cf74153ae8cbcc7) Signed-off-by: Peter Marko Signed-off-by: Mathieu Dubois-Briand Signed-off-by: Richard Purdie

ccache: enable ccache for all recipes if it is in HOSTTOOLS

2025-08-04T17:04:03+00:00

At the moment we don't allow ccache for native recipes to avoid the dependency loop of native recipes needing ccache-native which then depends on itself. One way to avoid this dependency loop is to just provide a host ccache, so enable ccache globally if ccache is in HOSTTOOLS. This isn't set out of the box, but does work. (From OE-Core rev: cc91a0f6500e88dd96a56307226fcfd16c60c342) Signed-off-by: Ross Burton Signed-off-by: Mathieu Dubois-Briand Signed-off-by: Richard Purdie

ccache: drop CCACHE_COMPILERCHECK

2025-07-28T16:37:02+00:00

This variable controls how ccache determines if the cache is valid or not for a given compiler. By default, ccache looks at the mtime of the compiler binary. This should be sufficient for our purposes as the mtime is preserved from sstate and will only be changed on rebuilds if the binary is actually different. (From OE-Core rev: 27aec0bab6fcb19c5d5be30763f4038a46922e8f) Signed-off-by: Ross Burton Signed-off-by: Mathieu Dubois-Briand Signed-off-by: Richard Purdie

ccache: move environment variables to the configuration file

2025-07-28T16:37:02+00:00

Move some environment variables to the configuration file, so there's less happening in the class. Max_size was removed so that the per-recipe caches don't grown without limit. The default cache is 5GB. (From OE-Core rev: 8c1c38a6b3073d2dd34514f5a90805c12c0f42dd) Signed-off-by: Ross Burton Signed-off-by: Mathieu Dubois-Briand Signed-off-by: Richard Purdie

ccache.bbclass: Add allowed list for native recipes

2023-08-21T10:34:12+00:00

Native recipes are not able to use ccache currently, due to a circular dependency between ccache-native and cmake-native. This affects also other native recipes, but not all, imposing a limitation in build time optimizations. The introduction of CCACHE_NATIVE_RECIPES_ALLOWED allows the user to specify which native recipes should use ccache, keeping it disable by default for all native recipes. (From OE-Core rev: 87cb2be71e0c0c123eaae6a5ae135900c95535db) Signed-off-by: Angelo Ribeiro Signed-off-by: Alexandre Belloni Signed-off-by: Richard Purdie

classes: Add SPDX license identifiers

2022-08-12T10:58:01+00:00

As stated in our top level license files, the license is MIT unless otherwise stated. Add SPDX identifers accordingly. Replace older license statementa with the standardised syntax. Also drop "All Rights Reserved" expression as it isn't used now, doesn't mean anything and is confusing. (From OE-Core rev: 081a391fe09a21265881e39a2a496e4e10b4f80b) Signed-off-by: Richard Purdie

classes: Add copyright statements to files without one

2022-08-12T10:58:01+00:00

Where there isn't a copyright statement, add one to make it explicit. Also drop editor config lines where they were present. (From OE-Core rev: 880c1ea3edc8edef974e65b2d424fc36809ea034) Signed-off-by: Richard Purdie

ccache.bbclass: Use ccache-native and disable ccache for native recipes

2021-01-20T00:45:05+00:00

Since host's ccache is not reliable, so disable ccache for native recipes and use ccache-native for other types of recipes. We need disable ccache for native recipes is because ccache-native now depends on cmake-native which causes circular dependencies, and it's not easy to break the circular. (From OE-Core rev: 631bbd4896882ba2acbe5bc85bc90ab7abc794ef) Signed-off-by: Robert Yang Signed-off-by: Richard Purdie

Revert "ccache.bbclass: use ccache from host distribution"

2021-01-20T00:45:05+00:00

This reverts commit f5b29367af4d8e5daea5771264774aa49519f9a8. Will use ccache-native which is more reliable. (From OE-Core rev: 1b659623430e1a6e6dd266e65bab7ca8155a7138) Signed-off-by: Robert Yang Signed-off-by: Richard Purdie