错误:ld.so: object LD_PRELOAD不能预加载:忽略。

I am using ubuntu 12.04. Every time I start my bash terminal and every time when I finish typing a command(and press enter) , I get this message:

我使用ubuntu 12.04。每当我启动bash终端，每次完成输入命令(并按下enter)时，我都会得到如下信息:

ERROR: ld.so: object '/usr/lib/liblunar-calendar-preload.so' from LD_PRELOAD cannot be preloaded: ignored.

错误:ld.so:/ usr / lib / liblunar-calendar-preload对象”。因此，从LD_PRELOAD无法预加载:忽略。

It is weird. So what is the environment variable LD_PRELOAD used for? And what is the going on behind the scene?

这是奇怪的。那么，环境变量LD_PRELOAD用来做什么呢?那么幕后发生了什么?

Thanks.

谢谢。

5 个解决方案

#1

The linker takes some environmental variables in to acount. one is LD_PRELOAD

链接器将一些环境变量引入到acount中。一个是LD_PRELOAD

from man 8 ld-linux :

来自man 8 ld-linux:

LD_PRELOAD
          A whitespace-separated list of additional,  user-specified,  ELF
          shared  libraries  to  be loaded before all others.  This can be
          used  to  selectively  override  functions   in   other   shared
          libraries.   For  setuid/setgid  ELF binaries, only libraries in
          the standard search directories that are  also  setgid  will  be
          loaded.

Therefore the linker will try to load libraries listed in the LD_PRELOAD variable before others are loaded.

因此，链接器将尝试加载LD_PRELOAD变量中列出的库，然后再加载其他库。

What could be the case that inside the variable is listed a library that can't be preloaded. look inside your .bashrc or .bash_profile environment where the LD_PRELOAD is set and remove that library from the variable.

在变量中可以列出一个不能预加载的库。查看您的.bashrc或.bash_profile环境，在其中设置LD_PRELOAD并从变量中删除该库。

#2

If you want to make sure that the library is loaded if and only if the program lunar-calendar-gtk is launched, you can apply this:

如果您希望确保库是加载的，并且只有在启动程序lunar-calendar-gtk时，您可以应用这个:

You set the environment variable per command by prefixing the command with it:

通过使用以下命令来设置每个命令的环境变量:

$ LD_PRELOAD="liblunar-calendar-preload.so" printenv "LD_PRELOAD"
liblunar-calendar-preload.so
$ printenv "LD_PRELOAD"
$

You can then choose to put this in a shell script and make lunar-calendar-gtk a symlink to this shell script, replaceing the original referencee. This effectively makes sure that the library is loaded everytime the original application is executed.

然后，您可以选择将其放入一个shell脚本中，并使lunar-calendar-gtk与这个shell脚本相关联，替换原来的引用。这样可以有效地确保每次执行原始应用程序时都加载了库。

You will have to rename the original lunar-calendar-gtk to something else, which might not be too intriguing as it possibly may cause issues with uninstallation and upgrading. However, I found it useful with a former version of Skype.

您将不得不将原始的lunar-calendar-gtk重命名为其他东西，这可能不会太引人注意，因为它可能会导致卸载和升级问题。然而，我发现它与以前版本的Skype很有用。

#3

Thanks for the responses. I think I've solved the problem just now.

谢谢你的回复。我想我刚才已经解决了这个问题。

Since LD_PRELOAD is for setting some library proloaded, I check the library that ld preloads with LD_PRELOAD, one of which is "liblunar-calendar-preload.so", that is not existing in the path "/usr/lib/liblunar-calendar-preload.so", but I find a similar library "liblunar-calendar-preload-2.0.so", which is a difference version of the former one.

因为LD_PRELOAD是用来设置一些库的，所以我检查了带有LD_PRELOAD的ld预加载的库，其中一个是“liblunar-calendar-preload”。因此，“在路径中不存在”/usr/lib/liblunar-calendar-preload。所以“，但我发现了一个类似的库”liblunar-calendar- preload2.0。所以，这是前一个版本的不同版本。

Then I guess maybe liblunar-calendar-preload.so was updated to a 2.0 version when the system updated, leaving LD_PRELOAD remain to be "/usr/lib/liblunar-calendar-preload.so". Thus the preload library name was not updated to the newest version.

然后我猜可能是liblunar-calendar-preload。当系统更新时，更新到2.0版本，留下LD_PRELOAD仍然是“/usr/lib/liblunar-calendar- preloadso”。因此，预加载库名称没有更新到最新版本。

To avoid changing environment variable, I create a symbolic link under the path "/usr/lib"

为了避免更改环境变量，我在path“/usr/lib”下创建了一个符号链接。

sudo ln -s liblunar-calendar-preload-2.0.so liblunar-calendar-preload.so

Then I restart bash, the error is gone.

然后重启bash，错误就消失了。

#4

It means the path you input caused an error. In your LD_PRELOAD command, modify the path like the error tips:

这意味着您输入的路径会导致错误。在LD_PRELOAD命令中，修改路径，如错误提示:

/usr/lib/liblunar-calendar-preload.so

#5

This may happen when you remove some software, reboot you computer.

这可能发生在你删除一些软件，重新启动你的电脑。

Today I install some software and do apt remove xxx and apt-get auroremove, I get this error. When grep it in my computer I cannot find this. This error occurs no matter what command I execute. But after I reboot my computer, it gone.

今天我安装了一些软件，并做了适当的删除xxx和apt-get auroremove，我得到了这个错误。在我的电脑里，我找不到这个。无论我执行什么命令，都会出现此错误。但当我重启电脑后，它就消失了。

#1