sifter Q sort issue

[Spekular]

Linking C shared module ../../ladspa/sifter_1210.dll
CMakeFiles/sifter_1210.dir/objects.a(sifter_1210.c.obj):sifter_1210.c:(.text+0xcf1): undefined reference to q_sort' CMakeFiles/sifter_1210.dir/objects.a(sifter_1210.c.obj):sifter_1210.c:(.text+0x1581): undefined reference toq_sort'
CMakeFiles/sifter_1210.dir/objects.a(sifter_1210.c.obj):sifter_1210.c:(.text+0x26d2): undefined reference to q_sort' CMakeFiles/sifter_1210.dir/objects.a(sifter_1210.c.obj):sifter_1210.c:(.text+0x2f62): undefined reference toq_sort'