程序用到了 expat 库函数，运行的时候提示“can't load library 'libexpat.so.1'”

Question

写了一个程序，用到了 expat 库的函数，但是运行的时候提示“can't load library 'libexpat.so.1'”

Makefile 里有这个LD_FLAGS：-Wl,-rpath=/usr1/lib
相应的在 /usr1/lib/ 下也有 libexpat.so 等库文件

运行的时候出错提示 “can't load library 'libexpat.so.1'”：
[/mnt/log]# test_env
test_env: can't load library 'libexpat.so.1'

用strace跟踪了一下，看起来好像是“-Wl,-rpath=/usr1/lib” 这个选项没有起作用？
[/mnt/log]# strace test_env
...
open("/usr1/lib/libexpat.so.1", O_RDONLY) = 3           # 奇怪的事，这里明明找到了，应该是 “-Wl,-rpath=/usr1/lib” 的功劳吧
fstat(3, {st_mode=S_IFREG|0755, st_size=302786, ...}) = 0
...
open("/home/work/platform/buildroot/build_arm/staging_dir//lib/libexpat.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib/libexpat.so.1", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/lib/libexpat.so.1", O_RDONLY)    = -1 ENOENT (No such file or directory)
open("/usr/lib/libexpat.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)         # 前面不是找过了，也找到了嘛，干吗还去这些地方找？不明白啊不明白...
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40007000
write(2, "", 0)                         = 0
write(2, "test_env", 8test_env)                 = 8
write(2, ": can\'t load library \'", 22: can't load library ') = 22
write(2, "libexpat.so.1", 13libexpat.so.1)           = 13
write(2, "\'\n", 2'
)                     = 2
munmap(0x40007000, 4096)                = 0
exit(16)                                = ?
Process 125 detached
[/mnt/log]#

Answer 1

补充一个现象，如果用“export LD_LIBRARY_PATH=/usr1/lib/” 那运行就可以成功，不过报了段错误，这是另外一个问题了，把这个问题解决了再看那个

Answer 2

顶一下啊！