Statically link libstdc++ and libgcc on Linux.

Makefile

@@ -35,6 +35,7 @@ build/dep/osdialog/osdialog_gtk3.c.o: FLAGS += $(shell pkg-config --cflags gtk+-
 	FLAGS += -fno-gnu-unique
 
 	LDFLAGS += -Wl,--whole-archive
+	LDFLAGS += -static-libstdc++ -static-libgcc
 	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 += -Wl,--no-whole-archive
 	LDFLAGS += -lpthread -lGL -ldl -lX11 -lasound -ljack