[rtems-central commit] spec: Update RTEMS_ZERO_LENGTH_ARRAY

[Sebastian Huber]

Module:    rtems-central
Branch:    master
Commit:    2ac3803d3b79eeb27bd062f7eab0e73617dce567
Changeset: http://git.rtems.org/rtems-central/commit/?id=2ac3803d3b79eeb27bd062f7eab0e73617dce567

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Aug  7 10:08:58 2020 +0200

spec: Update RTEMS_ZERO_LENGTH_ARRAY

---

 spec/if/compiler/stdc-version.yml            | 4 ++--
 spec/if/rtems/basedefs/zero-length-array.yml | 5 ++++-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/spec/if/compiler/stdc-version.yml b/spec/if/compiler/stdc-version.yml
index ac333d9..ef79dcf 100644
--- a/spec/if/compiler/stdc-version.yml
+++ b/spec/if/compiler/stdc-version.yml
@@ -2,10 +2,10 @@ SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
 copyrights:
 - Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de)
 enabled-by: true
-interface-type: unspecified
+interface-type: unspecified-define
 links:
 - role: interface-placement
   uid: container
 name: __STDC_VERSION__
-reference: null
+reference: https://en.cppreference.com/w/c/preprocessor/replace
 type: interface
diff --git a/spec/if/rtems/basedefs/zero-length-array.yml b/spec/if/rtems/basedefs/zero-length-array.yml
index bbc874e..24c23b4 100644
--- a/spec/if/rtems/basedefs/zero-length-array.yml
+++ b/spec/if/rtems/basedefs/zero-length-array.yml
@@ -5,7 +5,10 @@ copyrights:
 - Copyright (C) 2014 embedded brains GmbH (http://www.embedded-brains.de)
 definition:
   default: '0'
-  variants: []
+  variants:
+  - definition: null
+    enabled-by:
+    - ${../../compiler/stdc-version:/name} >= 199409L
 description: |
   Zero-length arrays are valid in C99 as flexible array members.  C++11 does
   not allow flexible array members.  Use the GNU extension which is also