Fix resolving external references to TLS variables. * findvar.c: Include `objfiles.h'. (read_var_value <LOC_UNRESOLVED>): New variable `obj_section'. Handle SEC_THREAD_LOCAL variables. * printcmd.c (address_info <LOC_UNRESOLVED>): Handle SEC_THREAD_LOCAL variables. gdb/testsuite/ Test resolving external references to TLS variables. * gdb.threads/tls.exp: New tests to examine A_THREAD_LOCAL and FILE2_THREAD_LOCAL. (testfile2, srcfile2): New variables. * gdb.threads/tls.c (file2_thread_local) (function_referencing_file2_thread_local): New. * gdb.threads/tls2.c: New file.
* gdb.threads/tls.c (spin): Check errno only if sem_wait actually failed. (do_pass): Likewise. * gdb.threads/tls.exp: Always initialize no_of_threads.
* gdb.threads/tls.c : New file. * gdb.threads/tls.exp : New file. * gdb.threads/tls-main.c : New file. * gdb.threads/tls-shared.c : New file. * gdb.threads/tls-shared.exp : New file.
