patches/abseil_windows_gnullvm_thread_identity.patch

# What: avoid MinGW pthread TLS linkage in Abseil thread identity selection.
# Scope: one MinGW-specific preprocessor branch in Abseil's internal
# thread-identity mode selection; no other Abseil behavior changes.

diff --git a/absl/base/internal/thread_identity.h b/absl/base/internal/thread_identity.h
--- a/absl/base/internal/thread_identity.h
+++ b/absl/base/internal/thread_identity.h
@@ -217,6 +217,8 @@
 #error ABSL_THREAD_IDENTITY_MODE cannot be directly set
 #elif defined(ABSL_FORCE_THREAD_IDENTITY_MODE)
 #define ABSL_THREAD_IDENTITY_MODE ABSL_FORCE_THREAD_IDENTITY_MODE
+#elif defined(__MINGW32__)
+#define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11
 #elif defined(_WIN32) && !defined(__MINGW32__)
 #define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11
 #elif defined(__APPLE__) && defined(ABSL_HAVE_THREAD_LOCAL)