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expected ')' before '*' token with function pointer
typedef struct {
    void (*drawFunc) ( void* );
} glesContext;

void glesRegisterDrawFunction(glesContext *glesContext, void(drawFunc*)(glesContext*));

void glesRegisterDrawFunction(glesContext *cntxt, void(*drawFunc)(glesContext*));
                                                       ^^^^^^^^^
                                                       note here

typedef struct {
    void (*drawFunc) ( void* );
} glesContext;

// define a pointer to function typedef
typedef void (*DRAW_FUNC)(glesContext*);

// now use this typedef to create the function declaration
void glesRegisterDrawFunction(glesContext *glesContext, DRAW_FUNC func);

void glesRegisterDrawFunction(glesContext *glesContext, void (*drawFunc)(glesContext*));