Bugzilla – Attachment #50791: The patch for fontconfig to let cairo/gtk support artificial bold font. for bug #118727
<edit name="embolden" mode="assign">
<bool>true</bool>
</edit>
<!-- It's for Xft -->
<edit name="weight" mode="assign">
<const>bold</const>
</match>
<!--
Artificial bold for fonts without an bold version
-->
<match target="font">
<test name="weight" compare="less_eq">
<const>medium</const>
</test>
<test target="pattern" name="weight" compare="more">
</fontconfig>