It's telling you exactly where the problem is:
C:\IC_GitCode\XMLPArser\rt_libxslt\src\libxslt-1.1.34\libxslt/xsltconfig.h(120): error C2018: unknown character '0x40'
It's on line 120 of the xsltconfig.h file. If you've got a problem with compiling some projects source code, contact the people that wrote the code.