...
  ccflags =' -s -O2 -DWIN32 -DWIN64 -DCONSERVATIVE -D__USE_MINGW_ANSI_STDIO -DPERL_TEXTMODE_SCRIPTS -DPERL_IMPLICIT_CONTEXT -DPERL_IMPLICIT_SYS -DUSE_PERLIO -fwrapv -fno-strict-aliasing -mms-bitfields'
...
  libpth=D:\ulisseDUE\perl5.26.64bit\c\lib D:\ulisseDUE\perl5.26.64bit\c\x86_64-w64-mingw32\lib D:\ulisseDUE\perl5.26.64bit\c\lib\gcc\x86_64-w64-mingw32\7.1.0