make -f Makefile.Release
make[1]: Entering directory `/cygdrive/g/code/qt/project/polymath/glc-lib/new'
g++ -Wl,-s -shared -mthreads -Wl,--out-implib,release/libGLC_lib2.a -o release/GLC_lib2.dll object_script.GLC_lib.Release  -L'h:/Temp/OpenCV-extract/opencv/dep/qt-everywhere-opensource-src-4.7.4/lib' -lglu32 -lopengl32 -lgdi32 -luser32 release/GLC_lib_resource_res.o -lQtOpenGL4 -lQtGui4 -lQtCore4
./release/quazip.o:quazip.cpp:(.text+0xb): undefined reference to `QTextCodec::codecForLocale()'
..
..
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all errors below...
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