Feb 26 2009

Compiling PHP 5.2.x / cannot find -lltdl

Posted by Denie Category: BASH, Linux, PHP, Tutorials
When compiling PHP from source, some of the CentOS users reported that they getting errors like below:

/usr/bin/ld: cannot find -lltdl
collect2: ld returned 1 exit status

What you need to do, is just follow the below steps.

  1. Verify that the libtool and libtool-ltdl packages are installed.
  2. Symlink libltdl.so to libltdl.so.x.x.x

If libtool and libtool-ltdl already exist, you may go to Step Two.
Step One

[root@banzaibill ~]# yum install libtool-ltdl libtool

Now you have libtool installed. To check it out, do:

[root@banzaibill ~]# yum info libtool*

Step Two

PHP looks for the libltdl library only at /usr/lib/libltdl.so

The symlink to this file is not included in the libtool packages. Do below commands:

[root@banzaibill ~]# cd /usr/lib
[root@banzaibill lib]# ln -s libltdl.so.3.1.4 libltdl.so

And that’s it. PHP should configure and compile without error.

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