I downloaded a ZIP of lmng 1.0.10 sources today and set to work on installing MinGW/MSVC builds.
When attempting to run
nmake -f makefiles/makefile.vcwin32, the build fails saying it doesn't know how to make 'libmng_chunk_descr'. This is because the OBJS1 setting is 'libmng_chunk_descr$(0)' when it should be 'libmng_chunk_descr$(O)', changing the zero to a capitol oh is a simple one character fix. Please tell the maintainer to use a font where O != 0 in the future; thank you.