Cannot compile on Windows 10 Pro

$ make
g++ -o plugin.dll build/src/Filter.cpp.o build/src/Displays.cpp.o build/src/Supersaw.cpp.o build/src/Stutter.cpp.o build/src/Filters.cpp.o build/src/Widener.cpp.o build/src/Randoms.cpp.o build/src/BigButton.cpp.o build/src/Panner.cpp.o build/src/BPM.cpp.o build/src/common.cpp.o build/src/TwinLFO.cpp.o build/src/Panners.cpp.o build/src/Sidechain.cpp.o build/src/RangeLFO.cpp.o build/src/Floats.cpp.o build/src/Notch.cpp.o build/src/Integers.cpp.o build/src/RJModules.cpp.o build/src/DSPUtilities.cpp.o build/src/BitCrush.cpp.o build/src/Noise.cpp.o build/src/Mono.cpp.o build/src/FFTuner.cpp.o build/src/VAStateVariableFilter.cpp.o build/src/Splitter.cpp.o build/src/Octaves.cpp.o build/src/Range.cpp.o build/src/Buttons.cpp.o build/src/BPF.cpp.o build/src/LRMixer.cpp.o build/src/Splitters.cpp.o build/src/Volumes.cpp.o build/src/FilterDelay.cpp.o -shared -L../.. -lRack
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/8.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: build/src/RJModules.cpp.o:RJModules.cpp:(.rdata$.refptr.modelRiser[.refptr.modelRiser]+0x0): undefined reference to `modelRiser'
collect2.exe: error: ld returned 1 exit status
make: *** [../../compile.mk:55: plugin.dll] Error 1

Reproduce the Windows build with make and start from build/src/RJModules.cpp.o and ../../compile.mk, where the linker reports the missing modelRiser reference. Trace that reference through the build inputs and confirm that compilation completes by producing plugin.dll.