[llvm] fcdc3c9 - [gn build] Port b4ff893877ff

[LLVM GN Syncbot via llvm-commits]

Author: LLVM GN Syncbot
Date: 2023-06-29T20:10:25Z
New Revision: fcdc3c977530af560d7778595cc74e6398dbf399

URL: https://github.com/llvm/llvm-project/commit/fcdc3c977530af560d7778595cc74e6398dbf399
DIFF: https://github.com/llvm/llvm-project/commit/fcdc3c977530af560d7778595cc74e6398dbf399.diff

LOG: [gn build] Port b4ff893877ff

Added: 
    

Modified: 
    llvm/utils/gn/secondary/libcxx/include/BUILD.gn

Removed: 
    


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diff  --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index 7b11ba14f748c0..eebfddc280636b 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -552,6 +552,7 @@ if (current_toolchain == default_toolchain) {
       "__locale_dir/locale_base_api/locale_guard.h",
       "__mbstate_t.h",
       "__mdspan/extents.h",
+      "__mdspan/layout_left.h",
       "__mdspan/layout_right.h",
       "__memory/addressof.h",
       "__memory/align.h",