5329fab3 requires <sys/uio.h>, which wasn't being included.
--autoconf-header="<sys/statvfs.h>" \
--autoconf-header="<sys/xattr.h>" \
--autoconf-header="<sys/mman.h>" \
+ --autoconf-header="<sys/uio.h>" \
--autoconf-header="<unistd.h>" \
--impl-header="<fcntl.h>" \
--impl-header="<signal.h>" \
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif /* ndef HAVE_SYS_MMAN_H */
+#ifdef HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif /* ndef HAVE_SYS_UIO_H */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* ndef HAVE_UNISTD_H */