FcConfigBuildFonts - Build font database
#include <fontconfig/fontconfig.h>
FcBool FcConfigBuildFonts (FcConfig *config);
Builds the set of available fonts for the given configuration.
Note that any changes to the configuration after this call (through
FcConfigParseAndLoad or FcConfigParseAndLoadFromMemory) have
indeterminate effects. (On the other hand, application fonts can still be
modified through FcConfigAppFontAddFile, FcConfigAppFontAddDir
and FcConfigAppFontClear). Returns FcFalse if this operation runs out
of memory. If config is NULL, the current configuration is used.