0001-Fix-build-of-jitterentropy-base.c-with-clang-v2.patch

From 8c5b0f6e108c426ce4c89a7127208fd96c4e5b3e Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar@redhat.com>
Date: Fri, 24 Jul 2020 05:22:14 +0000
Subject: [PATCH] Fix build of jitterentropy-base.c with clang v2

Clang has a slightly different pragma to disable optimizations.

v2: Make sure jitterentropy.h is included when buiding with clang.
---
 random/jitterentropy-base.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/random/jitterentropy-base.c b/random/jitterentropy-base.c
index 32fdea46..cd5af22b 100644
--- a/random/jitterentropy-base.c
+++ b/random/jitterentropy-base.c
@@ -50,9 +50,16 @@
  */
 
 #undef _FORTIFY_SOURCE
+#ifdef __clang__
+#pragma clang optimize off
+
+/* clang does not undefine the __OPTIMIZE__ macro after using the
+ * clang optimize off pragma, so the same __OPTIMIZE__ check below that
+ * is used for gcc won't work.
+ */
+#else
 #pragma GCC optimize ("O0")
 
-#include "jitterentropy.h"
 
 #ifndef CONFIG_CRYPTO_CPU_JITTERENTROPY_STAT
  /* only check optimization in a compilation for real work */
@@ -60,6 +67,9 @@
   #error "The CPU Jitter random number generator must not be compiled with optimizations. See documentation. Use the compiler switch -O0 for compiling jitterentropy-base.c."
  #endif
 #endif
+#endif
+
+#include "jitterentropy.h"
 
 #define MAJVERSION 2 /* API / ABI incompatible changes, functional changes that
 		      * require consumer to be updated (as long as this number
-- 
2.26.2