Package: dcmtk Version: 3.6.1~20160216-4 I would request upstream to add ifdef blocker around this. I am not sure if the exact naming convention was chosen on purpose.
/«PKGBUILDDIR»/ofstd/libsrc/ofconapp.cc:127:0: warning: "CANONICAL_HOST_TYPE" redefined #define CANONICAL_HOST_TYPE "Debian" In file included from /«PKGBUILDDIR»/ofstd/libsrc/ofconapp.cc:23:0: /«PKGBUILDDIR»/obj-aarch64-linux-gnu/config/include/dcmtk/config/osconfig.h:38:0: note: this is the location of the previous definition #define CANONICAL_HOST_TYPE ""