Add weak alias `_environ'.

diff --git a/posix/environ.c b/posix/environ.c
index 3eee48e..a0ed0d8 100644 (file)
--- a/posix/environ.c
+++ b/posix/environ.c
@@ -6,3 +6,7 @@
 /* This must be initialized; we cannot have a weak alias into bss.  */
 char **__environ = NULL;
 weak_alias (__environ, environ)
+
+/* The SVR4 ABI says `_environ' will be the name to use
+   in case the user overrides the weak alias `environ'.  */
+weak_alias (__environ, _environ)