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From 3b5fb8b6428dfaab39bab58d67412427f514c1f4 Mon Sep 17 00:00:00 2001
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From: Vaibhav Jain <vaibhav@linux.ibm.com>
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Date: Sat, 26 Feb 2022 17:09:55 +0530
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Subject: [PATCH 142/217] util/size.h: Fix build error for GCC < 10
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Building with GCC 8.4.1 results in following build error for 'util/size.c':
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../util/size.h:57:16: error: missing binary operator before token "("
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__has_builtin(__builtin_mul_overflow) && \
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This is caused due to missing '__has_builtin' preprocessor operator in GCC
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versions < 10.0.0. The patch updates the check for CLANG's availability of
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__builtin_{mul,add}_overflow to prevent preprocessor from evaluating the
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expression "___has_builtin(__builtin_mul_overflow) &&
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__has_builtin(__builtin_add_overflow)".
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Link: https://lore.kernel.org/r/20220226113955.526036-1-vaibhav@linux.ibm.com
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Fixes:10653a171bc0("util/size.h: fix build for older compilers")
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Reported-by: Tarun Sahu <tsahu@linux.ibm.com>
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Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
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Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
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Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
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---
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util/size.h | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/util/size.h b/util/size.h
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index 1cb0669..02baa77 100644
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--- a/util/size.h
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+++ b/util/size.h
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@@ -53,11 +53,12 @@ static inline bool is_power_of_2(unsigned long long v)
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#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
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#endif
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-#if __clang__ && \
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- __has_builtin(__builtin_mul_overflow) && \
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+#if __clang__
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+#if __has_builtin(__builtin_mul_overflow) && \
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__has_builtin(__builtin_add_overflow)
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#define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1
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#endif
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+#endif
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#if COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW
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--
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2.27.0
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