Trying to build conda package for crystal

build.sh

mkdir -p $PREFIX/bin $PREFIX/lib $PREFIX/share
ls -lha
cp bin/* $PREFIX/bin/
cp -r lib/* $PREFIX/lib/
cp -r share/* $PREFIX/share/

build_env.sh

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

PS1=${PS1:-}
[ -z "$PS1" ] && echo "Please run this script in interactive mode using 'bash -i'" && exit 1

conda_env_name=${1:-crystal}
wget https://github.com/crystal-lang/crystal/releases/download/1.0.0/crystal-1.0.0-1-linux-x86_64.tar.gz
tar -xf crystal-1.0.0-1-linux-x86_64.tar.gz
conda create -n $conda_env_name pcre libevent -y
conda activate $conda_env_name
echo $CONDA_PREFIX
cp -r crystal-1.0.0-1/* $CONDA_PREFIX/
cd $CONDA_PREFIX/lib/crystal/lib/
ln -s ../../libpcre.a
ln -s ../../libevent.a
cd -
crystal run hello_world.cr

hello_world.cr

puts "Hello World!"

meta.yaml

# Jinja variables help maintain the recipe as you'll update the version only here.
# Using the name variable with the URL in line 14 is convenient
# when copying and pasting from another recipe, but not really needed.
{% set name = "crystal" %}
{% set version = "1.0.0" %}

package:
  name: {{ name|lower }}
  version: {{ version }}

source:
  url: https://github.com/crystal-lang/crystal/releases/download/{{ version }}/crystal-{{ version }}-1-linux-x86_64.tar.gz
  # If getting the source from GitHub, remove the line above,
  # uncomment the line below, and modify as needed. Use releases if available:
  # url: https://github.com/simplejson/simplejson/releases/download/{{ version }}/simplejson-{{ version }}.tar.gz
  # and otherwise fall back to archive:
  # url: https://github.com/simplejson/simplejson/archive/v{{ version }}.tar.gz
  sha256: 00211ca77758e99210ec40b8c5517b086d2ff9909e089400f6d847a95e5689a4
  #  `openssl sha256 <file name>`.
  # You may need the openssl package, available on conda-forge:
  #  `conda install openssl -c conda-forge``

build:
  # Uncomment the following line if the package is pure Python and the recipe is exactly the same for all platforms.
  # It is okay if the dependencies are not built for all platforms/versions, although selectors are still not allowed.
  # See https://conda-forge.org/docs/maintainer/knowledge_base.html#noarch-python for more details.
  # noarch: python
  number: 0
  # If the installation is complex, or different between Unix and Windows, use separate bld.bat and build.sh files instead of this key.
  # By default, the package will be built for the Python versions supported by conda-forge and for all major OSs.
  # Add the line "skip: True  # [py<35]" (for example) to limit to Python 3.5 and newer, or "skip: True  # [not win]" to limit to Windows.
  # script: -  "{{ PYTHON }} -m pip install . -vv"

requirements:
  build:
    # If your project compiles code (such as a C extension) then add the required compilers as separate entries here.
    # Compilers are named 'c', 'cxx' and 'fortran'.
    # - {{ compiler('cxx') }}
  host:
    # - python
    # - pip
  run:
    - {{ compiler('cxx') }}
    # - pcre

test:
  files:
    - hello_world.cr
  commands:
    - crystal build hello_world.cr
  # Some packages might need a `test/commands` key to check CLI.
  # List all the packages/modules that `run_test.py` imports.
  # imports:
  #  - simplejson
  #  - simplejson.tests
  
about:
  home: https://github.com/simplejson/simplejson
  # Remember to specify the license variants for BSD, Apache, GPL, and LGPL.
  # Use the SPDX identifier, e.g: GPL-2.0-only instead of GNU General Public License version 2.0
  # See https://spdx.org/licenses/
  license: MIT
  # The license_family, i.e. "BSD" if license is "BSD-3-Clause". (optional)
  license_family: MIT
  # It is strongly encouraged to include a license file in the package,
  # (even if the license doesn't require it) using the license_file entry.
  # See https://docs.conda.io/projects/conda-build/en/latest/resources/define-metadata.html#license-file
  # license_file: LICENSE.txt
  summary: 'Simple, fast, extensible JSON encoder/decoder for Python'

  # The remaining entries in this section are optional, but recommended.
  description: |
    simplejson is a simple, fast, complete, correct and extensible
    JSON <https://json.org> encoder and decoder for Python 2.5+ and
    Python 3.3+. It is pure Python code with no dependencies, but includes
    an optional C extension for a serious speed boost.
  doc_url: https://simplejson.readthedocs.io/
  dev_url: https://github.com/simplejson/simplejson

extra:
  recipe-maintainers:
    # GitHub IDs for maintainers of the recipe.
    # Always check with the people listed below if they are OK becoming maintainers of the recipe. (There will be spam!)
    - LisaSimpson
    - LandoCalrissian

I guess the segfault is reported by conda, not by crystal. You can try my v1.0 package to see if you can build locally. If you still get a segfault, you will need help from others. PS: crystal also requires libevent.

Take a look at build_env.sh. I think this does what you did with your package, just inside a conda evironment. I'll try your package next.

Unfortunately, the portable package also fails with a segmentation fault. I think this is something to take up with the conda community.

I have created a PR for this conda recipe to conda-forge: conda-forge/staged-recipes#14379