Building in Docker fails for 0.36.0 Alpine image

[marghidanu]

Trying to perform a static build using the crystallang/crystal:0.36.0-alpine docker image. The compilation fails with the following message:

> shards build --release --no-debug --static
Dependencies are satisfied
Building: werk
Error target werk failed to compile:
/usr/lib/gcc/x86_64-alpine-linux-musl/9.3.0/../../../../x86_64-alpine-linux-musl/bin/ld: cannot find -lyaml (this usually means you need to install the development package for libyaml)
collect2: error: ld returned 1 exit status
Error: execution of command failed with code: 1: `cc "${@}" -o /opt/app/bin/werk  -rdynamic -static -L/usr/bin/../lib/crystal/lib -lyaml  -lpcre -lm -lgc -lpthread /usr/share/crystal/src/ext/libcrystal.a -levent -lrt`

The yaml and yaml-dev packages are both installed, and the $HOME/.cache directory was also removed. One thing to mention is that this path "-L/usr/bin/../lib/crystal/lib" which should resolve to /usr/lib/crystal/lib does not exist.

Relevant info:
Docker image: crystallang/crystal:0.36.0-alpine
Crystal 0.36.0 [1e6f96a] (2021-01-26)
LLVM: 10.0.0
Default target: x86_64-unknown-linux-musl

[straight-shoota]

Works for me: Nevermind, it's not --static

$ docker run --rm -it crystallang/crystal:0.36.0-alpine crystal eval 'require "yaml"; puts YAML.parse %("foo")'
foo

[straight-shoota]

It seems the static libs were extracted to yaml-static in alpine 3.12. So we should add that as a dependency in the Dockerfile.

[bcardiff]

FYI, All alpine docker images of 0.36.0 have just been republished with 3.13 and yaml-static.