[gn build] Port 8ce2675b1363

diff --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index a2d209a..2c8bd20 100644 (file)
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -161,6 +161,7 @@ if (current_toolchain == default_toolchain) {
       "__compare/common_comparison_category.h",
       "__compare/compare_three_way_result.h",
       "__compare/ordering.h",
+      "__compare/three_way_comparable.h",
       "__concepts/arithmetic.h",
       "__concepts/assignable.h",
       "__concepts/boolean_testable.h",