ERROR: ld.so: object 'libXXX32.so' from LD_PRELOAD cannot be preloaded: ignored.

在 x86_64 版本的 centos 5.x 运行 32 bit 的某程序，该程序需要利用 LD_PRELOAD 预先加载 libXXX32.so，也是 32 bit 的版本。

但是每次运行的时候，都会出现上面的提示，让我以为预先加载失败。

google 了一把，发现这个链接 ld.so too verbose when it can't LD_PRELOAD a 32 bit library on a 64 bit OS https://bugzilla.redhat.com/show_bug.cgi?id=249256

 

按照上面的说法，只要按照下面的步骤就可以重现这个问题

Description of problem:


If I set LD_PRELOAD to point to a 32 bit shared object when running a 32 bit

application on a 64 bit OS, ld.so (/lib64/ld-2.3.4.so) can report:


ERROR: ld.so: object '/path/to/some.so' from LD_PRELOAD cannot be preloaded:

ignored.


This can happen if the 32 bit application spawns a sub-process using the

system() call - because this calls /bin/sh which is a 64 bit binary (which

reports the 'ERROR') ...


Version-Release number of selected component (if applicable):


glibc-2.3.4-2.25


How reproducible:


Every time


Steps to Reproduce:

1. Set LD_PRELOAD to point to a 32 bit lib (on 64 bit OS)

2. Run 32 bit application that calls system()

3.


Actual results:


ERROR: ld.so: object '/path/to/some.so' from LD_PRELOAD cannot be preloaded:

ignored.


Expected results:


No 'ERROR' message


Additional info:


按照他的说法，对于32 bit的程序来说，预先加载已经是成功的，尽管出现这个消息。我比较了一下，发现我这边的情况也是类似的，不过这个提示信息确实比较雷人。

the 'ERROR' message cause users to report

problems where there are none. The word 'ERROR' is too strong - it's not really

an error as the application runs fine.