FcStrCmpIgnoreCase − compare UTF-8 strings ignoring case
#include <fontconfig/fontconfig.h>
int FcStrCmpIgnoreCase (const FcChar8 *s1, const FcChar8 *s2);
Returns the usual <0, 0, >0 result of comparing s1 and s2. This test is case-insensitive for all proper UTF-8 encoded strings.
Fontconfig version 2.10.95