The l_genl_msg_append_attrv() declaration in genl.h uses struct iovec *, but there's no guarantee that sys/uio.h has been included already (and the genl user might not need that header itself). Within the ell code, uio.h is already included by util.h which prevents build errors in ell itself. --- ell/genl.h | 1 + 1 file changed, 1 insertion(+) diff --git a/ell/genl.h b/ell/genl.h index 5df688b..3a37ed5 100644 --- a/ell/genl.h +++ b/ell/genl.h @@ -26,6 +26,7 @@ #include <stdbool.h> #include <stddef.h> #include <stdint.h> +#include <sys/uio.h> #ifdef __cplusplus extern "C" { -- 2.23.0