Concept ACK, let's see what Travis says

utACK ec7602b39eea0a7f8bc59eca3ac530e96e1e90e6

Looks like configure picked up the ccache: checking if ccache should be used... yes

utACK ec7602b

Lets see the gitian builder says: https://bitcoin.jonasschnelli.ch/build/524
https://bitcoin.jonasschnelli.ch/build/526

@jonasschnelli 's gitian build seems fine

What we still need to check is whether travis caches the ccache result, even though ~/.ccache is no longer in the list. I'm not sure how, is it possible to inspect the travis cache?

Edit: I tried through the GUI, as well as the travis command line tool, but with neither I was able to locate the cache for this PR. This might either mean it doesn't exist, or I couldn't get at it for another reason (e.g. some upper limit to the number of shown caches).

Seems the former. At the end of the travis logs it says:

store build cache
nothing changed, not updating cache

It's not writing the cache at all because it detects no changes?!

Just in case it's helpful, I successfully complied this on NetBSD 7.0 (64-bit). These are the commands I used:

git clone https://www.github.com/fanquake/bitcoin/
cd bitcoin
git checkout ccache-removal
./autogen.sh
./configure CPPFLAGS="-I/usr/pkg/include" LDFLAGS="-L/usr/pkg/lib" BOOST_CPPFLAGS="-I/usr/pkg/include" BOOST_LDFLAGS="-L/usr/pkg/lib"
gmake

If you'd like me to try building with different parameters, or check for the presence of certain files/directories, please let me know.

@randolf Thanks for testing, however this does not affect normal autotools builds, if you don't use the depends system. And I don't think the depends system works on NetBSD (though never tried).

@laanwj I don't know enough about the "depends system" to provide helpful perspective there, but I'd be happy to try if there are some instructions somewhere that I can follow.

re-utACK cc87967

Caching works on arm and osx cross-builds at least

utACK cc87967 - will merge this tomorrow after the meeting to minimize the amount of interference with ongoing travis testing

@laanwj I assume the meeting is over?

The travis builds on all my PR's seem to be failing with errors like:

$ if [ -z "$NO_DEPENDS" ]; then depends/$HOST/native/bin/ccache --max-size=$CCACHE_SIZE; fi
/home/travis/.travis/job_stages: line 57: depends/x86_64-unknown-linux-gnu/native/bin/ccache: No such file or directory

An example is https://travis-ci.org/bitcoin/bitcoin/jobs/350509177#L1055

@ryanofsky This is a travis bug. The command you mention above was removed from the travis yaml, it shouldn't be executed at all.

You can either ignore the failure or rebase your pull request on master. (Just changing the commit id via EDITOR=true git commit --ammend might be enough, but I haven't checked)

Edit: Just checked that rebase is not needed. You can just change the commit id