[llvm] 8d67d00 - gn build: libcxx: Select the std_thread pstl backend.

[via llvm-commits]

Author: Peter Collingbourne
Date: 2025-03-21T14:55:30-07:00
New Revision: 8d67d00a945d1b2b74b422edc8214cb1081e6487

URL: https://github.com/llvm/llvm-project/commit/8d67d00a945d1b2b74b422edc8214cb1081e6487
DIFF: https://github.com/llvm/llvm-project/commit/8d67d00a945d1b2b74b422edc8214cb1081e6487.diff

LOG: gn build: libcxx: Select the std_thread pstl backend.

In the CMake build the default pstl backend for libc++ when threads are
enabled is std_thread. By selecting the wrong backend we were triggering
some transitive_includes test failures.

Reviewers: aeubanks, nico

Reviewed By: aeubanks

Pull Request: https://github.com/llvm/llvm-project/pull/132455

Added: 
    

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

Removed: 
    


################################################################################
diff  --git a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
index adcc78308dc72..6cebb217bb920 100644
--- a/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
+++ b/llvm/utils/gn/secondary/libcxx/include/BUILD.gn
@@ -41,8 +41,8 @@ if (current_toolchain == default_toolchain) {
       "_LIBCPP_ABI_DEFINES=",
       "_LIBCPP_HARDENING_MODE_DEFAULT=_LIBCPP_HARDENING_MODE_NONE",
       "_LIBCPP_PSTL_BACKEND_LIBDISPATCH=",
-      "_LIBCPP_PSTL_BACKEND_SERIAL=1",
-      "_LIBCPP_PSTL_BACKEND_STD_THREAD=",
+      "_LIBCPP_PSTL_BACKEND_SERIAL=",
+      "_LIBCPP_PSTL_BACKEND_STD_THREAD=1",
     ]
     if (libcxx_abi_namespace != "") {
       values += [ "_LIBCPP_ABI_NAMESPACE=$libcxx_abi_namespace" ]