====== icecc ======

Icecc is outdated:

  * Latest release is 1.4.0 (2022) which doesn't include lots of nice fixes and features.
    * Thread [[https://github.com/icecc/icecream/issues/586|Overall status of the project #586]] points to use [[https://github.com/mozilla/sccache/|sccache]] instead of icecream
  * ''icecc.bbclass'' is not maintained and lack support of new Yocto features, generating a lot of problems (i.e. clang)
    *  '-fno-diagnostics-show-caret' in clang: [[https://github.com/kraj/meta-clang/issues/806|dunfell: compiler-rt: invalid argument causes sanity check to fail
#806]]
  * many forks with patches exists: [[https://github.com/icecc/icecream/compare/master...felix642:icecream:master|]]
  * [[https://mbition.yocto.co.kr/entry/Intermediate-results-of-icecc-icecream-testing-on-Yocto|Intermediate results of icecc (icecream) testing on Yocto]]
  * **YOCTO drops icecc.bbclass:**  [[https://git.yoctoproject.org/poky/commit/?id=ba4fd5229893a24ef1f305c0b04facf2329b16df|classes/recipes-devtools: Drop icecc from OE-Core]]
 
  * Issues:
    * [[https://lists.yoctoproject.org/g/yocto/topic/sdk_standard_sdk_build_with/76393119]]


===== Headline =====

  * [[https://timblechmann.gitlab.io/posts/2019-06-10-icecream.html]]

**NOTE:** icecc daemon has to be run on localhost. Instead of this all jobs will be spawned locally with i.e. ''-j 100''

<code bash>sudo apt-get install patchelf icecc icecc-monitor</code>

Example performance gain (''make -j14'' vs ''make -j 100''):

<code bash>
bitbake nativesdk-qemu

#
# ICECC_PARALLEL_MAKE = "-j 100"
#
bitbake nativesdk-qemu -c cleansstate
time bitbake nativesdk-qemu

real	3m58.270s
user	0m0.942s
sys	0m0.153s

#
# ICECC_DISABLED = "1"
#
bitbake nativesdk-qemu -c cleansstate
time bitbake nativesdk-qemu

real	7m21.235s
user	0m1.019s
sys	0m0.209s
</code>

====== Issues ======

===== Cannot use icecc: patchelf not found =====

<code>
NOTE: recipe shadow-native-4.8.1-r0: task do_configure: Started
WARNING: shadow-native-4.8.1-r0 do_configure: Cannot use icecc: patchelf not found
</code>

<code bash>sudo apt-get install patchelf</code>