fix TTS_DTOR_ITERATIONS with bits file

src/header/bits_limits_ptdi/cbindgen.toml

@@ -0,0 +1,13 @@
+# POSIX header spec: https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/limits.h.html
+#
+# These types are split out to avoid importing all of limits.h into other headers.
+#
+# POSIX headers that require PTHREAD_DESTRUCTOR_ITERATIONS:
+# - limits.h (where it should be defined)
+# - threads.h (for TSS_DTOR_ITERATIONS)
+include_guard = "_RELIBC_BITS_LIMITS_PTDI_H"
+language = "C"
+no_includes = true
+cpp_compat = true
+[enum]
+prefix_with_name = true

src/header/bits_limits_ptdi/mod.rs

@@ -0,0 +1,12 @@
+//! `PTHREAD_DESTRUCTOR_ITERATIONS` for `limits.h` implementation.
+//!
+//! See <https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/limits.h.html>.
+
+use crate::platform::types::c_long;
+
+/// Minimum required value for `PTHREAD_DESTRUCTOR_ITERATIONS`.
+pub const _POSIX_THREAD_DESTRUCTOR_ITERATIONS: c_long = 4;
+
+/// Maximum number of attempts made to destroy a thread's thread-specific data
+/// values on thread exit.
+pub const PTHREAD_DESTRUCTOR_ITERATIONS: c_long = _POSIX_THREAD_DESTRUCTOR_ITERATIONS;