On Sat, 12 Feb 2022 10:23:32 +0100, Francesco Pretto wrote: > I have a PDF manipulation library that needs to > use fontconfig for regular font lookups. My idea is that my library > code should attempt first to check if an existing default > configuration exists, and if it does it should use that. If it does > not exist I want to chose to let fontconfig to default initialize one > or create a custom one that fit better the purpose of my PDF library. Better idea: use the default config, unless the caller specifies alternate settings for you instead. In other words, give the caller the option to pass you an explicit “FcConfig *” object that they have constructed or obtained from somewhere; if this is NULL, then fall back to the default.