failing ccan tests on Alpine Linux

[jsarenik]

Issue and Steps to Reproduce

First I get the ccan module names used in C-Lightning (e393791 of ccan rustyrussell/ccan@05ec8351) by running*:

cd ~/src/lightning
cd ccan/ccan
find . -type f -name _info | cut -b3- | sed 's|/_info$||' > /tmp/ccan-modules

Now let us test those modules*:

cd ~/src/ccan
git checkout init-2507-g05ec8351 # as referenced in lightning/ccan/README
make tools/ccanlint/ccanlint
while read module; do echo tools/ccanlint/ccanlint -s --deps-fail-ignore $module; done < /tmp/ccan-modules | sh -sxe

This issue is related to rustyrussell/ccan#67 and seemingly also to rustyrussell/ccan#59

* the output of finding ccan modules used in C-Lightning and the output of running the ccanlint command for each found module can be found at https://gist.github.com/jsarenik/b87eded7ae290ff50806fe9baefd8f3f

Practically a C-Lightning daemon is running on Alpine Linux with success (payments and forwards work) but these failing tests make me wonder that maybe something needs fixing. My assumption may be wrong. That is why this issue was created — to get feed-back.

[cdecker]

This is strictly speaking not related to c-lightning, and must be fixed upstream.