Provided by: libfontconfig1-dev_2.13.1-2ubuntu3_amd64 bug

NAME
       FcConfigSubstitute - Execute substitutions


SYNOPSIS
       #include <fontconfig/fontconfig.h>

       FcBool FcConfigSubstitute (FcConfig *config, FcPattern *p, FcMatchKind kind);


DESCRIPTION
       Calls  FcConfigSubstituteWithPat  setting  p_pat  to  NULL. Returns FcFalse if the substitution cannot be
       performed (due to allocation failure).  Otherwise  returns  FcTrue.   If  config  is  NULL,  the  current
       configuration is used.

Fontconfig 2.13.1                                 06 April 2020                            FcConfigSubstitute(3)