[Clang] Fix failing test caused by non-portable diag message

diff --git a/clang/test/SemaCXX/static-assert-cxx26.cpp b/clang/test/SemaCXX/static-assert-cxx26.cpp
index 9eddc48..4c28fba 100644 (file)
--- a/clang/test/SemaCXX/static-assert-cxx26.cpp
+++ b/clang/test/SemaCXX/static-assert-cxx26.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++2c -fsyntax-only %s -verify
+// RUN: %clang_cc1 -std=c++2c -triple=x86_64-linux -fsyntax-only %s -verify
 
 static_assert(true, "");
 static_assert(true, 0); // expected-error {{the message in a static assertion must be a string literal or an object with 'data()' and 'size()' member functions}}