Conflict between vtkpng-9.0.lib and libpng.lib, but all of them must be link.
VTK use vtkpng-9.0.lib and vtkfreetype-9.0.lib,and opencv must link libpng.lib and freetype.lib.
I don’t know how to fix it.
How to build VTK static library can use extenal libpng and freetype static library and don’t have to link vtkpng-9.0.lib and vtkfreetype-9.0.lib again?
Build started...
1>------ Build started: Project: QtImageProcessing, Configuration: Release x64 ------
1>Reading Qt configuration (D:/Qt/5.15.2/msvc2019_64/bin/qmake)
1>libpng.lib(pngget.obj) : error LNK2005: png_get_eXIf already defined in vtkpng-9.0.lib(pngget.obj)
1>libpng.lib(pngget.obj) : error LNK2005: png_get_eXIf_1 already defined in vtkpng-9.0.lib(pngget.obj)
1>libpng.lib(pngset.obj) : error LNK2005: png_set_eXIf already defined in vtkpng-9.0.lib(pngset.obj)
1>libpng.lib(pngset.obj) : error LNK2005: png_set_eXIf_1 already defined in vtkpng-9.0.lib(pngset.obj)
1>libpng.lib(pngrutil.obj) : error LNK2005: png_check_chunk_length already defined in vtkpng-9.0.lib(pngrutil.obj)
1>libpng.lib(pngrutil.obj) : error LNK2005: png_handle_eXIf already defined in vtkpng-9.0.lib(pngrutil.obj)
1>libpng.lib(pngwutil.obj) : error LNK2005: png_write_eXIf already defined in vtkpng-9.0.lib(pngwutil.obj)
1>vtkfreetype-9.0.lib(ftbase.obj) : error LNK2005: FT_MulFix already defined in freetype.lib(ftbase.c.obj)
1>vtkfreetype-9.0.lib(psaux.obj) : error LNK2005: cff_builder_funcs already defined in freetype.lib(psaux.c.obj)
1>vtkfreetype-9.0.lib(psaux.obj) : error LNK2005: ps_builder_funcs already defined in freetype.lib(psaux.c.obj)
1>vtkfreetype-9.0.lib(psaux.obj) : error LNK2005: cff_decoder_funcs already defined in freetype.lib(psaux.c.obj)