Looks like it's complaining about this file https://github.com/linken233/OpenJK-SWGL/blob/swgl-master/code/game/g_utils.cpp
line 758
in particular this bit
if (!stricmp(e->classname, "item_shield")
|| !stricmp(e->classname, "item_seeker")
|| !stricmp(e->classname, "misc_model_gun_rack")
|| !stricmp(e->classname, "misc_model_ammo_rack")
|| !stricmp(e->classname, "ammo_blaster")
|| !stricmp(e->classname, "ammo_powercell")
|| !stricmp(e->classname, "item_binoculars")
|| !stricmp(e->classname, "item_shield_lrg_instant")
|| !stricmp(e->classname, "item_medpak_instant"))
{
return e;
}
seems like the rest of the file uses a function Q_stricmp so maybe compilation error will be fixed if you change all references of stricmp to Q_stricmp