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This is
commit cd547f0ddcd3a54e5b73bcda5ac0f0c46808db8b
Author: Jakub Jelinek <jakub@redhat.com>
Date: Sat Sep 26 10:07:41 2020 +0200
which is on the GCC 10 release branch and thus part of lang/gcc10-devel;
we should automatically get it with GCC 10.3.
--- libcpp/lex.c.orig 2020-11-02 10:24:50 UTC
+++ libcpp/lex.c
@@ -531,11 +531,11 @@ init_vectorized_lexer (void)
search_line_fast = impl;
}
-#elif defined(_ARCH_PWR8) && defined(__ALTIVEC__)
+#elif (GCC_VERSION >= 4005) && defined(_ARCH_PWR8) && defined(__ALTIVEC__)
/* A vection of the fast scanner using AltiVec vectorized byte compares
and VSX unaligned loads (when VSX is available). This is otherwise
- the same as the pre-GCC 5 version. */
+ the same as the AltiVec version. */
ATTRIBUTE_NO_SANITIZE_UNDEFINED
static const uchar *
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