[PATCH] fix single argument static_assert

[Marc Poulhiès]

Single argument static_assert is C++17 only.

libcpp/ChangeLog:

        * lex.cc: fix static_assert to use 2 arguments.
---
OK for master?

 libcpp/lex.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcpp/lex.cc b/libcpp/lex.cc
index daf2c770bc3..402a2e42f46 100644
--- a/libcpp/lex.cc
+++ b/libcpp/lex.cc
@@ -355,7 +355,7 @@ search_line_ssse3 (const uchar *s, const uchar *end 
ATTRIBUTE_UNUSED)
   /* Helper vector for pshufb-based matching:
      each character C we're searching for is at position (C % 16).  */
   v16qi lut = { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, '\n', 0, '\\', '\r', 0, '?' };
-  static_assert ('\n' == 10 && '\r' == 13 && '\\' == 92 && '?' == 63);
+  static_assert ('\n' == 10 && '\r' == 13 && '\\' == 92 && '?' == 63, "");
 
   v16qi d1, d2, t1, t2;
   /* Unaligned loads.  Reading beyond the final newline is safe,
-- 
2.45.2