List all Gentoo packages built against the old Lua or specific version

After similar articles about Python (List all Gentoo packages built against the old python or specific version) under Gentoo and Ruby List all Gentoo packages built against the old ruby or specific version, the Lua upgrade in Gentoo may have similar problems, so this article shows how to list old Lua modules and packages built against old Lua environments. Despite a clean upgrade without any blockers or masked packages, sometimes, on old machines, there might be packages left still built against an old version of Lua, which is even no longer available on the system!

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equery USE lua_targets_lua5-4

On Gentoo, there are two important flags in the configuration make.conf file:

LUA_SINGLE_TARGET="lua5-4"
LUA_TARGETS="lua5-1 lua5-4"

The LUA_TARGETS controls the support of multiple Lua versions installed on the system. When the Gentoo package has a use flag lua, the builder emerge will build the Lua module for all the Lua versions in LUA_TARGETS. Some programs or libraries may not support multiple versions to be installed on the system and they may require to specify just one Lua library target, against which they are going to be built and that’s why LUA_SINGLE_TARGET exists. In most cases, the LUA_SINGLE_TARGET should be the active (default in the system) Lua version.
Keep on reading!

List all Gentoo packages built against the old ruby or specific version

After a similar article about Python (List all Gentoo packages built against the old python or specific version) under Gentoo, the Ruby upgrade in Gentoo may have similar problems, so this article shows how to list old Ruby modules and packages build against old ruby environments. Despite a clean upgrade without any blockers or masked packages, sometimes, on old machines, there might be packages left still built against an old version of Ruby, which is no longer available on the system!

main menu
equery with USE ruby_targets_ruby26

On Gentoo, there is one important flag in the configuration make.conf file:

RUBY_TARGETS="ruby30 ruby31"

The RUBY_TARGETS controls the support of multiple Ruby versions installed on the system. When the Gentoo package has a use flag ruby, the builder emerge will build the Ruby module for all the Ruby versions in RUBY_TARGETS.
Keep on reading!

List all Gentoo packages built against the old python or specific version

Updating python under Gentoo is not always straightforward work. Despite a clean upgrade without any blockers or masked packages, sometimes, on old machines, there might be packages left still built against an old version of python, which is no longer available on the system!

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Query for USE with python_targets_python3_4, python_targets_python3_5 and python_targets_python3_6.

On Gentoo, there are two important flags in the configuration make.conf file:

PYTHON_TARGETS="python3_8 python3_10"
PYTHON_SINGLE_TARGET="python3_8"

The PYTHON_TARGETS and PYTHON_SINGLE_TARGET control the support of multiple Python versions installed on the system. When the Gentoo package has a use flag python, the builder emerge will build the python module for all the Python versions in PYTHON_TARGETS. Some programs or libraries may not support multiple versions to be installed on the system and they may require to specify just one Python library target, against which they are going to be built and that’s why PYTHON_SINGLE_TARGET exists. In most cases, the PYTHON_SINGLE_TARGET should be the active (default in the system) Python version.
Keep on reading!