From 3f89855cf89e38a009d85da26b1355f167985ca8 Mon Sep 17 00:00:00 2001
From: Simon Kuenzer <simon@unikraft.io>
Date: Tue, 14 Mar 2023 15:18:12 +0100
Subject: [PATCH] lib/posix-environ: Symbol aliases for `environ`

In order to comply with common libc behavior, we provide the following
symbol aliases for environ`: `_environ`, `__environ`, `___environ`.

Signed-off-by: Simon Kuenzer <simon@unikraft.io>
Reviewed-by: Delia Pavel <delia_maria.pavel@stud.acs.upb.ro>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #868
---
 lib/posix-environ/environ.c     | 3 +++
 lib/posix-environ/exportsyms.uk | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/lib/posix-environ/environ.c b/lib/posix-environ/environ.c
index 4a76acdeb..e7920ef4f 100644
--- a/lib/posix-environ/environ.c
+++ b/lib/posix-environ/environ.c
@@ -124,3 +124,6 @@ UK_LIBPARAM_PARAM_ARR_ALIAS(vars,
 #endif
 
 char **__environ = __init_env;
+__weak_alias(__environ, ___environ);
+__weak_alias(__environ, _environ);
+__weak_alias(__environ, environ);
diff --git a/lib/posix-environ/exportsyms.uk b/lib/posix-environ/exportsyms.uk
index b2a9dc00f..f2682aa31 100644
--- a/lib/posix-environ/exportsyms.uk
+++ b/lib/posix-environ/exportsyms.uk
@@ -3,4 +3,7 @@ unsetenv
 clearenv
 putenv
 getenv
+___environ
 __environ
+_environ
+environ
-- 
2.39.5