Use -load_hidden on Mac to hide library symbols.

Makefile

@@ -47,7 +47,7 @@ ifdef ARCH_MAC
 	LDFLAGS += -lpthread -ldl
 	LDFLAGS += -framework SystemConfiguration -framework Cocoa -framework OpenGL -framework IOKit -framework CoreVideo -framework CoreAudio -framework CoreMIDI
 	LDFLAGS += -Wl,-all_load
-	LDFLAGS += dep/lib/libGLEW.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a dep/lib/libarchive.a dep/lib/libzstd.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a dep/lib/librtmidi.a dep/lib/librtaudio.a
+	LDFLAGS += dep/lib/libGLEW.a dep/lib/libglfw3.a dep/lib/libjansson.a dep/lib/libcurl.a dep/lib/libssl.a dep/lib/libcrypto.a -Wl,-load_hidden,dep/lib/libarchive.a -Wl,-load_hidden,dep/lib/libzstd.a dep/lib/libspeexdsp.a dep/lib/libsamplerate.a -Wl,-load_hidden,dep/lib/librtmidi.a -Wl,-load_hidden,dep/lib/librtaudio.a
 endif
 
 ifdef ARCH_WIN