How to ignore_run_exports the {{compiler("cxx")}} requirement?

[tvandera]

Actual Behavior

My meta.yaml I have:

requirements:
  build:
    - {{ compiler("cxx") }}

which results in a run_exports requirement of e.g. on linux of libstdcxx-ng

How do I ignore this requirement?

Expected Behavior

This apparently does not work:

build:
  ignore_run_exports:
    - {{ compiler("cxx") }}

When I add debug-printing in render.py, I get:

Filtering run exports
Specs:  {'strong': ['libgfortran-ng >=7,<8.0a0', 'libgcc-ng >=7.3.0']}
Ignore list:  ['gxx_linux-64', 'gfortran_linux-64']
Filtered specs:  {'strong': ['libgfortran-ng >=7,<8.0a0', 'libgcc-ng >=7.3.0']}

Output of conda info

     active environment : base
    active env location : /home/vanderaa/miniconda3
            shell level : 1
       user config file : /home/vanderaa/.condarc
 populated config files :
          conda version : 4.8.3
    conda-build version : 3.18.11
         python version : 3.7.7.final.0
       virtual packages : __glibc=2.19
       base environment : /home/vanderaa/miniconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /home/vanderaa/miniconda3/pkgs
                          /home/vanderaa/.conda/pkgs
       envs directories : /home/vanderaa/miniconda3/envs
                          /home/vanderaa/.conda/envs
               platform : linux-64
             user-agent : conda/4.8.3 requests/2.23.0 CPython/3.7.7 Linux/4.2.0-42-generic ubuntu/14.04.6 glibc/2.19
                UID:GID : 1091:1112
             netrc file : None
           offline mode : False

[hmaarrfk]

It seems maybe you have to:

ignore_run_exports_from:
#                 ^^^^^^   <-- from might be key

https://docs.conda.io/projects/conda-build/en/latest/resources/define-metadata.html#export-runtime-requirements

[github-actions]

Hi there, thank you for your contribution!

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Thanks!