From: nakilon@...
Date: 2020-10-06T11:19:20+00:00
Subject: [ruby-core:100308] [Ruby master Misc#17174] "Error relocating, symbol not found" error when compiling a native extension on Alpine with Ruby >=2.4

Issue #17174 has been updated by Nakilon (Victor Maslov).


Nakilon (Victor Maslov) wrote:
> docker build - -t temp-ruby2.3.8 --build-arg RUBY_VERSION=2.3.8 --build-arg ALPINE_VERSION=3.8 <Dockerfile

Also tried the same version of Alpine but higher Ruby -- ruby:2.4.6-alpine3.8 -- got the same 

```
in `require_relative': Error relocating /dhash-vips/idhash.so: rb_deprecate_constant: symbol not found
```

that as I suppose confirms that it's not just Alpine/musl issue but something has changed in Ruby since 2.4

Meanwhile ruby:slim docker images work fine (tested 2.4.9 and 2.7.2) but they are too large...

----------------------------------------
Misc #17174: "Error relocating, symbol not found" error when compiling a native extension on Alpine with Ruby >=2.4
https://bugs.ruby-lang.org/issues/17174#change-87893

* Author: Nakilon (Victor Maslov)
* Status: Open
* Priority: Normal
----------------------------------------
My native extension gem compiles fine with all versions of Ruby on macOS but only with Ruby 2.3 on Alpine. It throws various `Error relocating`, `symbol not found` when I require the `.o` file. Here I made a branch to reproduce it in Docker quickly.
```
git clone https://github.com/Nakilon/dhash-vips.git --branch alpine-compilation-issues alpine-compilation-issues && cd alpine-compilation-issues
```
```
# compiles and does not fail on require
docker build - -t temp-ruby2.3.8 --build-arg RUBY_VERSION=2.3.8 --build-arg ALPINE_VERSION=3.8 <Dockerfile

# Error relocating /dhash-vips/idhash.so: rb_deprecate_constant: symbol not found - /dhash-vips/idhash.so (LoadError)
docker build - -t temp-ruby2.4.10 --build-arg RUBY_VERSION=2.4.10 --build-arg ALPINE_VERSION=3.11 <Dockerfile

# Error relocating /dhash-vips/idhash.so: rb_int_modulo: symbol not found - /dhash-vips/idhash.so (LoadError)
docker build - -t temp-ruby2.5.8 --build-arg RUBY_VERSION=2.5.8 --build-arg ALPINE_VERSION=3.12 <Dockerfile

# Error relocating /dhash-vips/idhash.so: rb_int_pow: symbol not found - /dhash-vips/idhash.so (LoadError)
docker build - -t temp-ruby2.6.6 --build-arg RUBY_VERSION=2.6.6 --build-arg ALPINE_VERSION=3.12 <Dockerfile
```
I wanted to ask in the Mailing List but for some reason my email didn't reach it. Guy on Freenode recommended to post here.



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