ssize_t is defined in sys/types.h Fixes: - http://autobuild.buildroot.org/results/444c9deb728fb041e560d940145f96cc4f... Signed-off-by: Fabrice Fontaine <fontaine.fabrice(a)gmail.com&gt; --- ell/ecc.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/ell/ecc.h b/ell/ecc.h index 26a5889..65c49e8 100644 --- a/ell/ecc.h +++ b/ell/ecc.h @@ -27,6 +27,8 @@ extern "C" { #endif +#include <sys/types.h> // for ssize_t + #define L_ECC_MAX_DIGITS 6 #define L_ECC_SCALAR_MAX_BYTES L_ECC_MAX_DIGITS * 8 #define L_ECC_POINT_MAX_BYTES L_ECC_SCALAR_MAX_BYTES * 2 -- 2.20.1