HAVE_FTRUNCATE 249 .ext/include/x86_64-linux/ruby/config.h #define HAVE_FTRUNCATE 1 HAVE_FTRUNCATE 410 include/ruby/win32.h #undef HAVE_FTRUNCATE HAVE_FTRUNCATE 411 include/ruby/win32.h #define HAVE_FTRUNCATE 1