From 291824f49dbe50a4812c204994ae288c4c43979a Mon Sep 17 00:00:00 2001 From: fbrosson Date: Fri, 18 May 2018 18:40:11 +0000 Subject: [PATCH] __builtin_prefetch did probably not exist before gcc 3.1. --- lib/common/compiler.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/common/compiler.h b/lib/common/compiler.h index b588e1104..366ed2b4b 100644 --- a/lib/common/compiler.h +++ b/lib/common/compiler.h @@ -92,7 +92,7 @@ #if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */ # include /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ # define PREFETCH(ptr) _mm_prefetch((const char*)ptr, _MM_HINT_T0) -#elif defined(__GNUC__) +#elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) ) # define PREFETCH(ptr) __builtin_prefetch(ptr, 0, 0) #else # define PREFETCH(ptr) /* disabled */ -- 2.47.2