reallocarray(3) has been added to glibc relatively recently (version 2.26, from 2017) and apparently not all users run new enough glibc. Moreover, reallocarray is not available with uclibc-ng. Just use realloc(3) for now since in this case there's no real risk of overflow. This will avoid the following build failure since commit 891b78e9e892a3bcd800eb3a298e6380e9a15dd1: /home/giuliobenetti/autobuild/run/instance-3/output-1/host/lib/gcc/xtensa-buildroot-linux-uclibc/10.3.0/../../../../xtensa-buildroot-linux-uclibc/bin/ld: src/sae.o: in function `sae_rx_authenticate': sae.c:(.text+0xd74): undefined reference to `reallocarray' Fixes: - http://autobuild.buildroot.org/results/c6d3f86282c44645b4f1c61882dc63ccfc... Signed-off-by: Fabrice Fontaine <fontaine.fabrice(a)gmail.com&gt; --- src/sae.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/src/sae.c b/src/sae.c index 7e6377f5..d04891e7 100644 --- a/src/sae.c +++ b/src/sae.c @@ -104,7 +104,7 @@ static void sae_rejected_groups_append(struct sae_sm *sm, uint16_t group) uint16_t i; if (!sm->rejected_groups) { - sm->rejected_groups = reallocarray(NULL, 2, sizeof(uint16_t)); + sm->rejected_groups = realloc(NULL, 2 * sizeof(uint16_t)); sm->rejected_groups[0] = 1; sm->rejected_groups[1] = group; return; @@ -114,8 +114,8 @@ static void sae_rejected_groups_append(struct sae_sm *sm, uint16_t group) if (sm->rejected_groups[i] == group) return; - sm->rejected_groups = reallocarray(sm->rejected_groups, - i + 1, sizeof(uint16_t)); + sm->rejected_groups = realloc(sm->rejected_groups, + (i + 1) * sizeof(uint16_t)); sm->rejected_groups[0] += 1; sm->rejected_groups[i] = group; } -- 2.33.0