200分请教strace发现的一个问题

linux,命令行下执行: strace /usr/php/bin/php

出现:
open("/usr/libmemcached/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libmcrypt//lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libevent/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libpng/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/curl/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/ImageMagick/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/jpeg/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libxml2/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/openssl/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/zlib/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/bzip2/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/freetype2/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libmcrypt/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/libmemcached//lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/usr/mysql/lib/libnss_files.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat(4, {st_mode=S_IFREG|0644, st_size=17301, ...}) = 0
mmap(NULL, 17301, PROT_READ, MAP_PRIVATE, 4, 0) = 0x7fbf98115000
close(4) = 0
open("/lib64/libnss_files.so.2", O_RDONLY) = 4


满屏都是这种open找不到,它为啥不能直接定位到(最后一行)呢?是配置有问题?

回复讨论(解决方案)

/etc/ld.so.conf配置文件内容呢。

[root@localhost ~]# cat /etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/bzip2/lib
/usr/local/openssl/lib
/usr/local/libmcrypt/lib
/usr/local/lib
/usr/local/freetype2/lib
/usr/local/mhash/lib
/usr/local/db/lib
/usr/local/fontconfig/lib