mirror of
https://github.com/espressif/esp-idf.git
synced 2026-09-22 13:01:16 +03:00
b3ae652f21
libstdc++ selects between a lock-free and a mutex-based policy for std::shared_ptr reference counting based on this macro. Enabling this option forces the lock-free policy, which avoids pulling in the mutex-based implementation and can reduce code size. Note: the lock-free policy avoids embedding a mutex in each control block, saving about 88 bytes per shared_ptr, and improves performance by using atomic operations instead of mutex locking. Note: this option changes the ABI of libstdc++ atomic/shared_ptr helpers. It can be incompatible when linking against prebuilt libraries that were compiled without it, leading to link errors or undefined runtime behavior. Only enable it if all C++ objects and libraries in the build use the same setting.
4 lines
384 B
YAML
4 lines
384 B
YAML
-
|
|
re: "Mixed libstdc\\+\\+ atomic lock policies detected"
|
|
hint: "Some object files or prebuilt libraries were compiled with a different _GLIBCXX_HAVE_ATOMIC_LOCK_POLICY setting than the rest of the project. std::shared_ptr reference counting may exhibit undefined behavior. Rebuild all C++ code and libraries with a consistent CONFIG_COMPILER_CXX_ATOMIC_LOCK_POLICY setting."
|