From ae2c5820a1515b7f52ee570b206d1559654aec5d Mon Sep 17 00:00:00 2001
From: Calvin Rose <calsrose@gmail.com>
Date: Sat, 25 May 2024 13:24:01 -0500
Subject: [PATCH] Fix janet_strerror when _GNU_SOURCE defined.

---
 src/core/util.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/util.c b/src/core/util.c
index 9d7aab3a..09cf36f2 100644
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -958,6 +958,9 @@ const char *janet_strerror(int e) {
 #ifdef JANET_WINDOWS
     /* Microsoft strerror seems sane here and is thread safe by default */
     return strerror(e);
+#elif defined(_GNU_SOURCE)
+    /* See https://linux.die.net/man/3/strerror_r */
+    return strerror_r(e, janet_vm.strerror_buf, sizeof(janet_vm.strerror_buf));
 #else
     strerror_r(e, janet_vm.strerror_buf, sizeof(janet_vm.strerror_buf));
     return janet_vm.strerror_buf;