+ * configure.ac (pthread.h): Use AC_CHECK_HEADERS instead of
+ AC_CHECK_HEADER.
+ (target_thread_file): New. Set from sed'ed gcc output.
+ (posix_threads): New. Set from target_thread_file. Use instead of
+ ac_have_pthread_h.
+ (pthread_create_version): Move initialization before code using it.
+ * configure: Regenerate.
+