Problem Libertine semi-bold with lining nums

Question

I wish I could use the semi-bold version of the Libertine font.

By default, I use elzevirian numbers and there, no problem, I can have elzevirian numbers in semi-bold.

On some occasions, I would need to use lining nums with semi-bold.

However, the lining numbers that are supposed to be in semi-bold are actually in normal weight.

Here is a MWE :

\documentclass{article}

\RequirePackage[oldstyle,proportional]{libertine}
\DeclareRobustCommand\textsb[1]{{\libertineSB#1}}

\begin{document}
\LARGE

\noindent
Some "default" text with old style nums : 1234567890\\
\textsb{Some semi-bold text with old style nums : 1234567890}\\
\textbf{Some bold text with old style nums : 1234567890}\\

\noindent
Some text with lining nums : \liningnums{1234567890}\\
\textsb{Some semi-bold text with lining nums : \liningnums{1234567890}}\\
\textbf{Some bold text with lining nums : \liningnums{1234567890}}\\
\end{document}

Do you know how to solve this problem?

Thank you.

Answer 1

It works with pdflatex, but not with (Lua|Xe)LaTeX, due to a bug in libertine.sty that resets the font family, instead of adding the required features when doing \liningnums.

\documentclass{article}
\usepackage{iftex}

\usepackage[oldstyle,proportional]{libertine}

\DeclareTextFontCommand\textsb{\libertineSB}

\iftutex % XeLaTeX or LuaLaTeX
  \RenewDocumentCommand{\liningnums}{m}{%
    {\addfontfeatures{Numbers=Lining}#1}%
  }
\fi

\begin{document}

\noindent
Some "default" text with old style nums: 1234567890\\
\textsb{Some semi-bold text with old style nums: 1234567890}\\
\textbf{Some bold text with old style nums: 1234567890}

\noindent
Some text with lining nums: \liningnums{1234567890}\\
\textsb{Some semi-bold text with lining nums: \liningnums{1234567890}}\\
\textbf{Some bold text with lining nums: \liningnums{1234567890}}

\end{document}