"Header guard failure" build failure(s) — clang 6.0

PackageVersionSupposed error messageFull log Bug report
gxneur 0.20.0-1./xkb.h:20:9: error: '_XKBGXNEUR_H_' is used as a header guard here, followed by #define of a different macro [-Werror,-Wheader-guard] Log
paris-traceroute 0.93+git20160927-1./use.h:1:9: error: 'USE_H' is used as a header guard here, followed by #define of a different macro [-Werror,-Wheader-guard] Log

2 errors