Unresolved external symbol _getenv

[dhaval9217]

I have clone this repo in my local environment and convert it into Windows 8.1

And then when i am trying to build MuPDFWinRT Project, i got error as below.

Severity Code Description Project File Line Suppression State
Error LNK2001 unresolved external symbol _getenv MuPDFWinRT (base)\PDFReader\MuPDF.WinRT\Win8\libthirdparty.lib(jmemmgr.obj) 1

Can anyone help me?

Thanks in advance.