Snapcraft

Make snapcraft work with ccache

Bug #1626766 reported by Olivier Paroz
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Snapcraft
New
Undecided
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Bug Description

Despite having a properly configured ccache using $PATH, parts don't seem to be using it when compiling code.
It should be automatically picked up and used.

A simple test is to build a snap using a simple C++ example. Compiling by hand uses ccache, compiling uses snapcraft doesn't.

```
$ whereis g++
g++: /usr/bin/g++ /usr/lib/ccache/g++ /usr/share/man/man1/g++.1.gz
$ which g++
/usr/lib/ccache/g++

```

See original description
Olivier Paroz (oparoz)
description: updated
Revision history for this message
林博仁(Buo-ren, Lin) (buo-ren-lin) wrote :

As a workaround you may use the ccache remote part:
https://forum.snapcraft.io/t/speed-up-snap-building/7979

Revision history for this message
Mike Miller (mtmiller) wrote :

I have run into this, installing ccache in the host and building a snap with --destructive. I think this is because snapcraft prepends directories to PATH, so 'gcc' is found under /snap/.../usr/bin, not under /usr/lib/ccache.

A workaround that works for me is setting the environment variables CC="ccache gcc" and CXX="ccache g++" in the build environment.

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