각 API를 사용하기 위해 탑재해야 하는 so찾기

안녕하세요
특정 프로그램을 임베디드 리눅스에 포팅중인데요..
각 리눅스 api를 사용하기위해서는 해당하는 so파일이 탑재되어야 한다고 알게 되었습니다.
어떠한 so가 필요한지 oem에 알려주어야 하는데,

1. api만 들고 어떤 so가 필요한지 알 수 있는 좋은 방법이 있을까요?

2. nm -A .../lib/lib* | grep api 로 찾아봤는데 첨부와 같이 너무 많은 결과가 나오네요..
t,T,w,W 등의 인덱스가 무얼 의미하는지.. 찾고자하는 api문자열 앞뒤에 붙은 것은 무엇인지.. 알려주시면 감사하겠습니다..

3. grep에 -w 옵션을 넣어주니
/opt/montavista/pro/devkit/arm/v4t_le/target/lib/libc-2.3.2.so:000cd700 W close
/opt/montavista/pro/devkit/arm/v4t_le/target/lib/libc.so.6:000cd700 W close
/opt/montavista/pro/devkit/arm/v4t_le/target/lib/libpthread-0.10.so:0000c8a0 W close
/opt/montavista/pro/devkit/arm/v4t_le/target/lib/libpthread.so.0:0000c8a0 W close

요렇게 나오는데... libc2.3.2.so가.. 원하는 결과라고 볼 수 있을까요?
libpthread-0.10.so만 탑재되어도 되는 걸까요.. 도움을 부탁 드립니다...

---------------- 첨부 파일 ----------------
close에 대해 찾은 경우

libSegFault.so: U close@@GLIBC_2.0
libc-2.3.2.so:00066dc8 t _IO_cookie_close
libc-2.3.2.so:00066440 T _IO_fclose@@GLIBC_2.1
libc-2.3.2.so:0006ebe8 T _IO_fclose@GLIBC_2.0
libc-2.3.2.so:00071684 T _IO_file_close
libc-2.3.2.so:00071684 t _IO_file_close_internal
libc-2.3.2.so:0006fbb8 T _IO_file_close_it@@GLIBC_2.1
libc-2.3.2.so:000738bc T _IO_file_close_it@GLIBC_2.0
libc-2.3.2.so:0006fbb8 t _IO_file_close_it_internal
libc-2.3.2.so:00071650 t _IO_file_close_mmap
libc-2.3.2.so:00066440 t _IO_new_fclose
libc-2.3.2.so:0006fbb8 t _IO_new_file_close_it
libc-2.3.2.so:00068124 t _IO_new_proc_close
libc-2.3.2.so:0006ebe8 t _IO_old_fclose
libc-2.3.2.so:000738bc t _IO_old_file_close_it
libc-2.3.2.so:0006f0d4 t _IO_old_proc_close
libc-2.3.2.so:00068124 T _IO_proc_close@@GLIBC_2.1
libc-2.3.2.so:0006f0d4 T _IO_proc_close@GLIBC_2.0
libc-2.3.2.so:000cd700 t __GI___close
libc-2.3.2.so:000cd700 t __GI___libc_close
libc-2.3.2.so:000e75b4 t __GI___res_nclose
libc-2.3.2.so:00105d60 t __GI__dl_close
libc-2.3.2.so:000cd700 t __GI_close
libc-2.3.2.so:000cd700 W __close
libc-2.3.2.so:000a8020 t __closedir
libc-2.3.2.so:0006ddb0 t __fcloseall
libc-2.3.2.so:000196d0 t __gconv_close
libc-2.3.2.so:0001a5f4 t __gconv_close_transform
libc-2.3.2.so:000cd700 T __libc_close
libc-2.3.2.so:00106ab8 t __libc_dlclose
libc-2.3.2.so:00066440 t __new_fclose
libc-2.3.2.so:0006d530 t __new_pclose
libc-2.3.2.so:0006ebe8 t __old_fclose
libc-2.3.2.so:0006f240 t __old_pclose
libc-2.3.2.so:000e75b4 T __res_nclose
libc-2.3.2.so:00105d60 T _dl_close
libc-2.3.2.so:0002b750 T catclose
libc-2.3.2.so:000cd700 W close
libc-2.3.2.so:000a8020 W closedir
libc-2.3.2.so:000d6238 T closelog
libc-2.3.2.so:000d61f0 t closelog_internal
libc-2.3.2.so:000ffbd4 t do_close
libc-2.3.2.so:00106a10 t do_dlclose
libc-2.3.2.so:00066440 T fclose@@GLIBC_2.1
libc-2.3.2.so:0006ebe8 T fclose@GLIBC_2.0
libc-2.3.2.so:0006ddb0 W fcloseall
libc-2.3.2.so:0006e864 t fmemopen_close
libc-2.3.2.so:000d0dac T fts_close
libc-2.3.2.so:00018c40 T iconv_close
libc-2.3.2.so:0006d530 T pclose@@GLIBC_2.1
libc-2.3.2.so:0006f240 T pclose@GLIBC_2.0
libc-2.3.2.so:000cbb40 T posix_spawn_file_actions_addclose
libc.so.6:00066dc8 t _IO_cookie_close
libc.so.6:00066440 T _IO_fclose@@GLIBC_2.1
libc.so.6:0006ebe8 T _IO_fclose@GLIBC_2.0
libc.so.6:00071684 T _IO_file_close
libc.so.6:00071684 t _IO_file_close_internal
libc.so.6:0006fbb8 T _IO_file_close_it@@GLIBC_2.1
libc.so.6:000738bc T _IO_file_close_it@GLIBC_2.0
libc.so.6:0006fbb8 t _IO_file_close_it_internal
libc.so.6:00071650 t _IO_file_close_mmap
libc.so.6:00066440 t _IO_new_fclose
libc.so.6:0006fbb8 t _IO_new_file_close_it
libc.so.6:00068124 t _IO_new_proc_close
libc.so.6:0006ebe8 t _IO_old_fclose
libc.so.6:000738bc t _IO_old_file_close_it
libc.so.6:0006f0d4 t _IO_old_proc_close
libc.so.6:00068124 T _IO_proc_close@@GLIBC_2.1
libc.so.6:0006f0d4 T _IO_proc_close@GLIBC_2.0
libc.so.6:000cd700 t __GI___close
libc.so.6:000cd700 t __GI___libc_close
libc.so.6:000e75b4 t __GI___res_nclose
libc.so.6:00105d60 t __GI__dl_close
libc.so.6:000cd700 t __GI_close
libc.so.6:000cd700 W __close
libc.so.6:000a8020 t __closedir
libc.so.6:0006ddb0 t __fcloseall
libc.so.6:000196d0 t __gconv_close
libc.so.6:0001a5f4 t __gconv_close_transform
libc.so.6:000cd700 T __libc_close
libc.so.6:00106ab8 t __libc_dlclose
libc.so.6:00066440 t __new_fclose
libc.so.6:0006d530 t __new_pclose
libc.so.6:0006ebe8 t __old_fclose
libc.so.6:0006f240 t __old_pclose
libc.so.6:000e75b4 T __res_nclose
libc.so.6:00105d60 T _dl_close
libc.so.6:0002b750 T catclose
libc.so.6:000cd700 W close
libc.so.6:000a8020 W closedir
libc.so.6:000d6238 T closelog
libc.so.6:000d61f0 t closelog_internal
libc.so.6:000ffbd4 t do_close
libc.so.6:00106a10 t do_dlclose
libc.so.6:00066440 T fclose@@GLIBC_2.1
libc.so.6:0006ebe8 T fclose@GLIBC_2.0
libc.so.6:0006ddb0 W fcloseall
libc.so.6:0006e864 t fmemopen_close
libc.so.6:000d0dac T fts_close
libc.so.6:00018c40 T iconv_close
libc.so.6:0006d530 T pclose@@GLIBC_2.1
libc.so.6:0006f240 T pclose@GLIBC_2.0
libc.so.6:000cbb40 T posix_spawn_file_actions_addclose
libconsole.so.0: U close@@GLIBC_2.0
libconsole.so.0: U fclose@@GLIBC_2.1
libconsole.so.0.0.0: U close@@GLIBC_2.0
libconsole.so.0.0.0: U fclose@@GLIBC_2.1
libctutils.so.0: U close@@GLIBC_2.0
libctutils.so.0: U closedir@@GLIBC_2.0
libctutils.so.0: U fclose@@GLIBC_2.1
libctutils.so.0.0.0: U close@@GLIBC_2.0
libctutils.so.0.0.0: U closedir@@GLIBC_2.0
libctutils.so.0.0.0: U fclose@@GLIBC_2.1
libdb-3.2.so:00022804 t __bam_c_close
libdb-3.2.so:00028dec T __bam_db_close
libdb-3.2.so:00053f38 T __db_c_close
libdb-3.2.so:0004c88c T __db_close
libdb-3.2.so:0005b97c T __db_closechk
libdb-3.2.so:00015440 T __db_db_close_1
libdb-3.2.so:000166f0 T __db_dbc_close_1
libdb-3.2.so:0006fc64 T __db_dbm_close
libdb-3.2.so:00014c20 T __db_env_close_1
libdb-3.2.so:0005d6d0 t __db_join_close
libdb-3.2.so:000701dc T __db_ndbm_close
libdb-3.2.so:00057fbc T __db_txnlist_close
libdb-3.2.so:0006f52c T __db_vrfy_ccclose
libdb-3.2.so:000c37ec t __db_xa_close
libdb-3.2.so:0001b460 T __dbcl_db_close
libdb-3.2.so:0001f9ac T __dbcl_db_close_ret
libdb-3.2.so:0001e150 T __dbcl_dbc_close
libdb-3.2.so:00020114 T __dbcl_dbc_close_ret
libdb-3.2.so:00014a48 T __dbcl_dbclose_common
libdb-3.2.so:00019be4 T __dbcl_env_close
libdb-3.2.so:0001f594 T __dbcl_env_close_ret
libdb-3.2.so:0001f1a0 T __dbcl_memp_fclose
libdb-3.2.so:000143f8 T __dbcl_txn_close
libdb-3.2.so:000721e0 T __dbenv_close
libdb-3.2.so:00078c98 t __ham_c_close
libdb-3.2.so:00085d7c T __ham_db_close
libdb-3.2.so:00099144 T __lock_close
libdb-3.2.so:000985c0 T __lock_dbenv_close
libdb-3.2.so:0009b6ac T __log_close
libdb-3.2.so:000a1ecc T __log_close_files
libdb-3.2.so:000a9284 T __memp_close
libdb-3.2.so:000ad500 T __os_closehandle
libdb-3.2.so:000b314c t __qam_c_close
libdb-3.2.so:000b8800 T __qam_db_close
libdb-3.2.so:000b7bec T __qam_fclose
libdb-3.2.so:000c2fb4 T __txn_close
libdb-3.2.so:000c4a9c t __xa_close
libdb-3.2.so: U close@@GLIBC_2.0
libdb-3.2.so: U closedir@@GLIBC_2.0
libdb-3.2.so:0001364c t db185_close
libdb-3.2.so:000ade48 T db_env_set_func_close
libdb-3.2.so: U fclose@@GLIBC_2.1
libdb-3.2.so:000a6ef8 T memp_fclose
libdb-3.2.so:00017578 T xdr___db_close_msg
libdb-3.2.so:000175f0 T xdr___db_close_reply
libdb-3.2.so:000191d8 T xdr___dbc_close_msg
libdb-3.2.so:00019224 T xdr___dbc_close_reply
libdb-3.2.so:00016cec T xdr___env_close_msg
libdb-3.2.so:00016d64 T xdr___env_close_reply
libdb-3.so:00022804 t __bam_c_close
libdb-3.so:00028dec T __bam_db_close
libdb-3.so:00053f38 T __db_c_close
libdb-3.so:0004c88c T __db_close
libdb-3.so:0005b97c T __db_closechk
libdb-3.so:00015440 T __db_db_close_1
libdb-3.so:000166f0 T __db_dbc_close_1
libdb-3.so:0006fc64 T __db_dbm_close
libdb-3.so:00014c20 T __db_env_close_1
libdb-3.so:0005d6d0 t __db_join_close
libdb-3.so:000701dc T __db_ndbm_close
libdb-3.so:00057fbc T __db_txnlist_close
libdb-3.so:0006f52c T __db_vrfy_ccclose
libdb-3.so:000c37ec t __db_xa_close
libdb-3.so:0001b460 T __dbcl_db_close
libdb-3.so:0001f9ac T __dbcl_db_close_ret
libdb-3.so:0001e150 T __dbcl_dbc_close
libdb-3.so:00020114 T __dbcl_dbc_close_ret
libdb-3.so:00014a48 T __dbcl_dbclose_common
libdb-3.so:00019be4 T __dbcl_env_close
libdb-3.so:0001f594 T __dbcl_env_close_ret
libdb-3.so:0001f1a0 T __dbcl_memp_fclose
libdb-3.so:000143f8 T __dbcl_txn_close
libdb-3.so:000721e0 T __dbenv_close
libdb-3.so:00078c98 t __ham_c_close
libdb-3.so:00085d7c T __ham_db_close
libdb-3.so:00099144 T __lock_close
libdb-3.so:000985c0 T __lock_dbenv_close
libdb-3.so:0009b6ac T __log_close
libdb-3.so:000a1ecc T __log_close_files
libdb-3.so:000a9284 T __memp_close
libdb-3.so:000ad500 T __os_closehandle
libdb-3.so:000b314c t __qam_c_close
libdb-3.so:000b8800 T __qam_db_close
libdb-3.so:000b7bec T __qam_fclose
libdb-3.so:000c2fb4 T __txn_close
libdb-3.so:000c4a9c t __xa_close
libdb-3.so: U close@@GLIBC_2.0
libdb-3.so: U closedir@@GLIBC_2.0
libdb-3.so:0001364c t db185_close
libdb-3.so:000ade48 T db_env_set_func_close
libdb-3.so: U fclose@@GLIBC_2.1
libdb-3.so:000a6ef8 T memp_fclose
libdb-3.so:00017578 T xdr___db_close_msg
libdb-3.so:000175f0 T xdr___db_close_reply
libdb-3.so:000191d8 T xdr___dbc_close_msg
libdb-3.so:00019224 T xdr___dbc_close_reply
libdb-3.so:00016cec T xdr___env_close_msg
libdb-3.so:00016d64 T xdr___env_close_reply
libdb.so:00022804 t __bam_c_close
libdb.so:00028dec T __bam_db_close
libdb.so:00053f38 T __db_c_close
libdb.so:0004c88c T __db_close
libdb.so:0005b97c T __db_closechk
libdb.so:00015440 T __db_db_close_1
libdb.so:000166f0 T __db_dbc_close_1
libdb.so:0006fc64 T __db_dbm_close
libdb.so:00014c20 T __db_env_close_1
libdb.so:0005d6d0 t __db_join_close
libdb.so:000701dc T __db_ndbm_close
libdb.so:00057fbc T __db_txnlist_close
libdb.so:0006f52c T __db_vrfy_ccclose
libdb.so:000c37ec t __db_xa_close
libdb.so:0001b460 T __dbcl_db_close
libdb.so:0001f9ac T __dbcl_db_close_ret
libdb.so:0001e150 T __dbcl_dbc_close
libdb.so:00020114 T __dbcl_dbc_close_ret
libdb.so:00014a48 T __dbcl_dbclose_common
libdb.so:00019be4 T __dbcl_env_close
libdb.so:0001f594 T __dbcl_env_close_ret
libdb.so:0001f1a0 T __dbcl_memp_fclose
libdb.so:000143f8 T __dbcl_txn_close
libdb.so:000721e0 T __dbenv_close
libdb.so:00078c98 t __ham_c_close
libdb.so:00085d7c T __ham_db_close
libdb.so:00099144 T __lock_close
libdb.so:000985c0 T __lock_dbenv_close
libdb.so:0009b6ac T __log_close
libdb.so:000a1ecc T __log_close_files
libdb.so:000a9284 T __memp_close
libdb.so:000ad500 T __os_closehandle
libdb.so:000b314c t __qam_c_close
libdb.so:000b8800 T __qam_db_close
libdb.so:000b7bec T __qam_fclose
libdb.so:000c2fb4 T __txn_close
libdb.so:000c4a9c t __xa_close
libdb.so: U close@@GLIBC_2.0
libdb.so: U closedir@@GLIBC_2.0
libdb.so:0001364c t db185_close
libdb.so:000ade48 T db_env_set_func_close
libdb.so: U fclose@@GLIBC_2.1
libdb.so:000a6ef8 T memp_fclose
libdb.so:00017578 T xdr___db_close_msg
libdb.so:000175f0 T xdr___db_close_reply
libdb.so:000191d8 T xdr___dbc_close_msg
libdb.so:00019224 T xdr___dbc_close_reply
libdb.so:00016cec T xdr___env_close_msg
libdb.so:00016d64 T xdr___env_close_reply
libdl-2.3.2.so: U _dl_close@@GLIBC_PRIVATE
libdl-2.3.2.so:00001074 T dlclose
libdl-2.3.2.so:00001070 t dlclose_doit
libdl.so.2: U _dl_close@@GLIBC_PRIVATE
libdl.so.2:00001074 T dlclose
libdl.so.2:00001070 t dlclose_doit
libe2p.so.2: U close@@GLIBC_2.0
libe2p.so.2: U closedir@@GLIBC_2.0
libe2p.so.2.3: U close@@GLIBC_2.0
libe2p.so.2.3: U closedir@@GLIBC_2.0
libext2fs.so.2: U close@@GLIBC_2.0
libext2fs.so.2: U closedir@@GLIBC_2.0
libext2fs.so.2:00009860 T ext2fs_close
libext2fs.so.2:0000d210 T ext2fs_close_inode_scan
libext2fs.so.2:0000506c T ext2fs_file_close
libext2fs.so.2: U fclose@@GLIBC_2.1
libext2fs.so.2:00004aec t inode_close
libext2fs.so.2:00005a6c t test_close
libext2fs.so.2:0001182c t unix_close
libext2fs.so.2.4: U close@@GLIBC_2.0
libext2fs.so.2.4: U closedir@@GLIBC_2.0
libext2fs.so.2.4:00009860 T ext2fs_close
libext2fs.so.2.4:0000d210 T ext2fs_close_inode_scan
libext2fs.so.2.4:0000506c T ext2fs_file_close
libext2fs.so.2.4: U fclose@@GLIBC_2.1
libext2fs.so.2.4:00004aec t inode_close
libext2fs.so.2.4:00005a6c t test_close
libext2fs.so.2.4:0001182c t unix_close
libmemusage.so: U close@@GLIBC_2.0
libncurses.so.5: U close@@GLIBC_2.0
libncurses.so.5: U fclose@@GLIBC_2.1
libncurses.so.5:00014770 T wenclose
libncurses.so.5.2: U close@@GLIBC_2.0
libncurses.so.5.2: U fclose@@GLIBC_2.1
libncurses.so.5.2:00014770 T wenclose
libnsl-2.3.2.so: U close@@GLIBC_2.0
libnsl-2.3.2.so: U fclose@@GLIBC_2.1
libnsl.so.1: U close@@GLIBC_2.0
libnsl.so.1: U fclose@@GLIBC_2.1
libnss_compat-2.3.2.so: U fclose@@GLIBC_2.1
libnss_compat.so.2: U fclose@@GLIBC_2.1
libnss_files-2.3.2.so: U fclose@@GLIBC_2.1
libnss_files.so.2: U fclose@@GLIBC_2.1
libnss_hesiod-2.3.2.so: U __res_nclose@@GLIBC_2.2
libnss_hesiod-2.3.2.so: U fclose@@GLIBC_2.1
libnss_hesiod.so.2: U __res_nclose@@GLIBC_2.2
libnss_hesiod.so.2: U fclose@@GLIBC_2.1
libnss_winbind.so: U close@@GLIBC_2.0
libnss_winbind.so:000022a4 T close_sock
libnss_winbind.so.2: U close@@GLIBC_2.0
libnss_winbind.so.2:000022a4 T close_sock
libnss_wins.so:00027ae8 T cli_close
libnss_wins.so:00024020 T cli_close_connection
libnss_wins.so:000273ec T cli_nt_delete_on_close
libnss_wins.so: U close@@GLIBC_2.0
libnss_wins.so:000564e8 T close_low_fds
libnss_wins.so:000600a4 T close_sock
libnss_wins.so: U dlclose
libnss_wins.so: U fclose@@GLIBC_2.1
libnss_wins.so:0001c5b8 T lp_preexec_close
libnss_wins.so:0001c61c T lp_rootpreexec_close
libnss_wins.so:00021cbc t myfile_close
libnss_wins.so:00047048 T sys_dlclose
libnss_wins.so:00046f70 T sys_pclose
libnss_wins.so:00063bac T tdb_close
libnss_wins.so.2:00027ae8 T cli_close
libnss_wins.so.2:00024020 T cli_close_connection
libnss_wins.so.2:000273ec T cli_nt_delete_on_close
libnss_wins.so.2: U close@@GLIBC_2.0
libnss_wins.so.2:000564e8 T close_low_fds
libnss_wins.so.2:000600a4 T close_sock
libnss_wins.so.2: U dlclose
libnss_wins.so.2: U fclose@@GLIBC_2.1
libnss_wins.so.2:0001c5b8 T lp_preexec_close
libnss_wins.so.2:0001c61c T lp_rootpreexec_close
libnss_wins.so.2:00021cbc t myfile_close
libnss_wins.so.2:00047048 T sys_dlclose
libnss_wins.so.2:00046f70 T sys_pclose
libnss_wins.so.2:00063bac T tdb_close
libpam.so.0: U dlclose@@GLIBC_2.0
libpam.so.0: U fclose@@GLIBC_2.1
libpam.so.0:00004cd4 T pam_close_session
libpam.so.0.72: U dlclose@@GLIBC_2.0
libpam.so.0.72: U fclose@@GLIBC_2.1
libpam.so.0.72:00004cd4 T pam_close_session
libpamc.so.0: U close@@GLIBC_2.0
libpamc.so.0: U closedir@@GLIBC_2.0
libpamc.so.0.72: U close@@GLIBC_2.0
libpamc.so.0.72: U closedir@@GLIBC_2.0
libpcprofile.so: U close@@GLIBC_2.0
libproc.so.2.0.14: U close@@GLIBC_2.0
libproc.so.2.0.14:00004c2c T close_psdb
libproc.so.2.0.14: U closedir@@GLIBC_2.0
libproc.so.2.0.14:000052a4 T closeproc
libproc.so.2.0.14: U fclose@@GLIBC_2.1
libpthread-0.10.so:0000c8a0 W __close
libpthread-0.10.so:0000c8a0 t __libc_close
libpthread-0.10.so:0000c8a0 W close
libpthread-0.10.so:0000a508 T sem_close
libpthread.so.0:0000c8a0 W __close
libpthread.so.0:0000c8a0 t __libc_close
libpthread.so.0:0000c8a0 W close
libpthread.so.0:0000a508 T sem_close
libresolv-2.3.2.so:00006624 T __res_close
libresolv-2.3.2.so: U __res_nclose@@GLIBC_2.2
libresolv-2.3.2.so: U fclose@@GLIBC_2.1
libresolv.so.2:00006624 T __res_close
libresolv.so.2: U __res_nclose@@GLIBC_2.2
libresolv.so.2: U fclose@@GLIBC_2.1
librt-2.3.2.so: U close@@GLIBC_2.0
librt.so.1: U close@@GLIBC_2.0
libss.so.2: U close@@GLIBC_2.0
libss.so.2: U closedir@@GLIBC_2.0
libss.so.2: U fclose@@GLIBC_2.1
libss.so.2.0: U close@@GLIBC_2.0
libss.so.2.0: U closedir@@GLIBC_2.0
libss.so.2.0: U fclose@@GLIBC_2.1
libutil-2.3.2.so: U close@@GLIBC_2.0
libutil.so.1: U close@@GLIBC_2.0
libuuid.so.1: U close@@GLIBC_2.0
libuuid.so.1.2: U close@@GLIBC_2.0
libwrap.so.0: U close@@GLIBC_2.0
libwrap.so.0: U fclose@@GLIBC_2.1
libwrap.so.0.7.6: U close@@GLIBC_2.0