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我想在this gist在OSX 10.9构建示例：在OSX 10.9中使用DYLD_BIND_AT_LAUNCH和sshfs装入？
cd /tmp
git clone https://gist.github.com/ecfd80885b9ddf6734192c056cf48bf4.git fopentest
cd fopentest
bash buildrun.sh
生成成功 - 进而，我可以看到在终端输出如下：
...
+ DYLD_BIND_AT_LAUNCH=YES
+ ./fopentest.exe ./mytestfile.txt
This is a wrapper function for fopen.
=== this is mytestfile.txt ===
Second line here...
Third line here...
这将意味着致电DYLD_BIND_AT_LAUNCH=YES ./fopentest.exe ./mytestfile.txt成功找到包装库和函数。
现在，只是作为一个测试，我想通过dtruss，OSX “strace” equivalent运行此可执行文件 - 我也做了sudo chmod u+s /usr/sbin/dtrace推荐在该链接。所以，我尝试在/tmp文件夹：
$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
This is a wrapper function for fopen.
stat64("libwrapper.dylib\0", 0x7FFF5A7DF248, 0x7FFF5A7E00E0) = 0 0
open("libwrapper.dylib\0", 0x0, 0x0) = 3 0
write_nocancel(0x1, "This is a wrapper function for fopen.\n=== this is mytestfile.txt ===\nSecond line here...\nThird line here...\n\0", 0x6C) = 108 0
因此，很明显dtruss这里工作。不过，我在不同的目录完全相同的文件，为什么我尝试运行相同的命令，dtruss失败：
$ DYLD_BIND_AT_LAUNCH=YES dtruss ./fopentest.exe ./mytestfile.txt 2>&1 | grep wrap
dyld: Library not loaded: libwrapper.dylib
stat64("libwrapper.dylib\0", 0x7FFF4FD85228, 0x7FFF4FD860C0) = 0 0
open("libwrapper.dylib\0", 0x0, 0x0) = -1 Err#2
stat64("/Users/MYNAME/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0) = -1 Err#2
stat64("/usr/local/lib/libwrapper.dylib\0", 0x7FFF4FD85A08, 0x7FFF4FD860C0) = -1 Err#2
stat64("/usr/lib/libwrapper.dylib\0", 0x7FFF4FD85A18, 0x7FFF4FD860C0) = -1 Err#2
怎么可能是这个原因？