From 7d1336469a2b21a1d65cbf47647379f23fd037e9 Mon Sep 17 00:00:00 2001
From: Jia Zhang <address@hidden>
Date: Sat, 28 Oct 2017 02:14:01 -0400
Subject: [PATCH 2/4] gc-libgcrypt: fix undefined enum type in switch statement

-Werror=switch causes the following build failure due to using the
undefined enum value:

lib/gc-libgcrypt.c: In function 'gc_hash_open':
lib/gc-libgcrypt.c:317:5: error: case value '0' not in enumerated type 'Gc_hash_mode {aka enum Gc_hash_mode}' [-Werror=switch]
     case 0:
     ^~~~

In order to fix this issue, define GC_NULL and refer it instead of 0.

* lib/gc.h: Define GC_NULL as a place holder for hash mode.
* lib/gc-libgcrypt.c: Use GC_NULL.
---
 lib/gc-libgcrypt.c | 2 +-
 lib/gc.h           | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/gc-libgcrypt.c b/lib/gc-libgcrypt.c
index c2f806f90..7106e5974 100644
--- a/lib/gc-libgcrypt.c
+++ b/lib/gc-libgcrypt.c
@@ -314,7 +314,7 @@ gc_hash_open (Gc_hash hash, Gc_hash_mode mode, gc_hash_handle * outhandle)
 
   switch (mode)
     {
-    case 0:
+    case GC_NULL:
       gcrymode = 0;
       break;
 
diff --git a/lib/gc.h b/lib/gc.h
index ebda3b992..e65ba49a3 100644
--- a/lib/gc.h
+++ b/lib/gc.h
@@ -54,7 +54,8 @@ typedef enum Gc_hash Gc_hash;
 
 enum Gc_hash_mode
 {
-  GC_HMAC = 1
+  GC_NULL,
+  GC_HMAC
 };
 typedef enum Gc_hash_mode Gc_hash_mode;
 
-- 
2.14.1