xelatex running maketextfm far too often

Hi all

with a simple document that tries to load a non-existing font,
xelatex tries to run mktextfm faaaar too many times ...

Is it possible to turn this off or change the behaviour?

$ cat bla.tex
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{fontspec}
\setmainfont{WhateverUnknownFont}
\begin{document}
Hello WOrld
\end{document}

$ xelatex bla.tex 2>&1 | tee bla-full.log
...

$ grep mktextfm bla-full.log 
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont/BI
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input BI
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input BI' failed to make BI.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont/B
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input B
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input B' failed to make B.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont/I
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input I
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input I' failed to make I.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.
kpathsea: Running mktextfm WhateverUnknownFont
mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont
mktextfm: `mf-nowin -progname=mf \mode:=ljfour; mag:=1; ; nonstopmode; input WhateverUnknownFont' failed to make WhateverUnknownFont.tfm.

Where are all those calls coming from?

Thanks

Norbert

--
DI Dr Norbert Preining                        https://www.preining.info
arXiv / Cornell University   +   IFMGA Guide   +   TU Wien  +  TeX Live
GPG: 0x860CDC13   fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13