From 3b5fb8b6428dfaab39bab58d67412427f514c1f4 Mon Sep 17 00:00:00 2001

From: Vaibhav Jain <vaibhav@linux.ibm.com>

Date: Sat, 26 Feb 2022 17:09:55 +0530

Subject: [PATCH 142/217] util/size.h: Fix build error for GCC < 10

Building with GCC 8.4.1 results in following build error for 'util/size.c':

../util/size.h:57:16: error: missing binary operator before token "("

   __has_builtin(__builtin_mul_overflow) && \

This is caused due to missing '__has_builtin' preprocessor operator in GCC

versions < 10.0.0. The patch updates the check for CLANG's availability of

__builtin_{mul,add}_overflow to prevent preprocessor from evaluating the

expression "___has_builtin(__builtin_mul_overflow) &&

__has_builtin(__builtin_add_overflow)".

Link: https://lore.kernel.org/r/20220226113955.526036-1-vaibhav@linux.ibm.com

Fixes:10653a171bc0("util/size.h: fix build for older compilers")

Reported-by: Tarun Sahu <tsahu@linux.ibm.com>

Reviewed-by: Joao Martins <joao.m.martins@oracle.com>

Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>

---

 util/size.h | 5 +++--

 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/util/size.h b/util/size.h

index 1cb0669..02baa77 100644

--- a/util/size.h

+++ b/util/size.h

@@ -53,11 +53,12 @@ static inline bool is_power_of_2(unsigned long long v)

 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1

 #endif

-#if __clang__ && \

-    __has_builtin(__builtin_mul_overflow) && \

+#if __clang__

+#if __has_builtin(__builtin_mul_overflow) && \

     __has_builtin(__builtin_add_overflow)

 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1

 #endif

+#endif

 #if COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW

-- 

2.27.0