Note that with xscreensaver 5.21, AC_SYS_LARGEFILE is added to configure.in, so _FILE_OFFSET_BITS will be set to 64 in config.h{,in} if needed with doing configure, and modifying CFLAGS is no longer needed.
Note that with xscreensaver 5.21, AC_SYS_LARGEFILE is added to configure.in, so _FILE_OFFSET_BITS will be set to 64 in config.h{,in} if needed with doing configure, and modifying CFLAGS is no longer needed.