diff -ur root-6.18.04.orig/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp root-6.18.04/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp
--- root-6.18.04.orig/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp 2019-09-11 15:36:49.000000000 +0200
+++ root-6.18.04/interpreter/llvm/src/tools/clang/lib/Lex/Lexer.cpp 2020-02-06 14:36:14.580497452 +0100
@@ -2373,7 +2373,7 @@
'/', '/', '/', '/', '/', '/', '/', '/'
};
while (CurPtr+16 <= BufferEnd &&
- !vec_any_eq(*(const vector unsigned char*)CurPtr, Slashes))
+ !vec_any_eq(*(const __vector unsigned char*)CurPtr, Slashes))
CurPtr += 16;
#else
// Scan for '/' quickly. Many block comments are very large.