PLAIN_FILE_BUF_SIZE undeclared
ioz.c use PLAIN_FILE_BUF_SIZE in both liblzma and libzstd compression code, but it's only defined when liblzma is available, i.e., when only libzstd is available of the two, it causes compilation failure.
ioz.c use PLAIN_FILE_BUF_SIZE in both liblzma and libzstd compression code, but it's only defined when liblzma is available, i.e., when only libzstd is available of the two, it causes compilation failure.