Check for definition of AT_SECURE before using it

This fixes compilation on kfreebsd-*.

Forwarded: https://github.com/ocaml/ocaml/pull/8842

Gbp-Pq: Name 0005-Check-for-definition-of-AT_SECURE-before-using-it.patch

diff --git a/otherlibs/unix/envir.c b/otherlibs/unix/envir.c
index 3ad4b9caa0206e42a042408449a6687890303f7e..bdc41939bc2874b834cd202aa7c7876f5e594de0 100644 (file)
--- a/otherlibs/unix/envir.c
+++ b/otherlibs/unix/envir.c
@@ -39,7 +39,7 @@ CAMLprim value unix_environment_unsafe(value unit)
 
 static char **secure_environ(void)
 {
-#ifdef HAS_GETAUXVAL
+#if defined(HAS_GETAUXVAL) && defined(AT_SECURE)
   if (!getauxval(AT_SECURE))
     return environ;
   else