work around "signal loses thread pointer" issue with "approach 2"
[musl] / src / search /
drwxr-xr-x   ..
-rw-r--r-- 1995 hsearch.c
-rw-r--r-- 448 insque.c
-rw-r--r-- 609 lsearch.c
-rw-r--r-- 3351 tsearch_avl.c