I installed XHProf and would like to see call graph visualization. I clicked on View Full Callgraph and got following message first:
failed to execute cmd: " dot -Tpng". stderr: `sh: dot: command not found '
After some googling, I find out, that it's caused by not installed Graphviz. Then I installed it:
$ yum install graphviz
and tried again. Now I'm getting following error messages:
failed to execute cmd: " dot -Tpng". stderr: `Error: /usr/lib64/graphviz/config6 is zero sized, or other read error.
Error: /usr/lib64/graphviz/config6 is zero sized, or other read error.
There is no layout engine support for "dot"
Perhaps "dot -c" needs to be run (with installer's privileges) to register the plugins?
'
Indeed executing of dot -c causes an error:
$ dot -c
Error: /usr/lib64/graphviz/config6 is zero sized, or other read error.
Warning: Could not load "/usr/lib64/graphviz/libgvplugin_pango.so.6" - file not found
Warning: Could not load "/usr/lib64/graphviz/libgvplugin_xlib.so.6" - file not found
Segmentation fault
But the files libgvplugin_pango.so.6 and libgvplugin_xlib.so.6 are there and located in /usr/lib64/graphviz/:
$ ls -l /usr/lib64/graphviz
total 724
...
lrwxrwxrwx 1 root root 26 May 19 13:58 libgvplugin_pango.so.6 -> libgvplugin_pango.so.6.0.0
-rwxr-xr-x 1 root root 22408 Sep 19 2012 libgvplugin_pango.so.6.0.0
lrwxrwxrwx 1 root root 25 May 19 13:58 libgvplugin_xlib.so.6 -> libgvplugin_xlib.so.6.0.0
-rwxr-xr-x 1 root root 15656 Sep 19 2012 libgvplugin_xlib.so.6.0.0
Well, as symlinks. But it should not matter. Anyway, I also tested this case:
mv /usr/lib64/graphviz/libgvplugin_pango.so.6 /usr/lib64/graphviz/libgvplugin_pango.so.6_DEACT
mv /usr/lib64/graphviz/libgvplugin_xlib.so.6 /usr/lib64/graphviz/libgvplugin_xlib.so.6_DEACT
cp /usr/lib64/graphviz/libgvplugin_pango.so.6.0.0 /usr/lib64/graphviz/libgvplugin_pango.so.6
cp /usr/lib64/graphviz/libgvplugin_xlib.so.6.0.0 /usr/lib64/graphviz/libgvplugin_xlib.so.6
No effect, still the same errors.
What is goning wrong here and how to get this working?
Environment: VirtualBox VM with CentOS 6 as guest system.
I've finally got it working.
Short answer:
I guess the yum update or/and perhaps the ann-libs installation might have been the decisive step(-s). But it's just an assumption, therefore I described all the steps, that might be important (s. below).
Detailed answer:
First I tried to install graphviz with related packages:
$ yum install 'graphviz*'
But the installation didn't work:
Error: php56w-common conflicts with php-common-5.3.3-46.el6_6.x86_64
You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
cairo-1.8.8-3.1.el6.x86_64 has missing requires of libpixman-1.so.0()(64bit)
Then I tried the same, but added the graphviz-rhel.repo to the repositories before:
$ cd /etc/yum.repos.d/
$ wget http://www.graphviz.org/graphviz-rhel.repo
$ yum list available 'graphviz*'
$ yum install 'graphviz*'
It failed with another error:
Error: Package: graphviz-2.38.0-1.el6.x86_64 (graphviz-stable)
Requires: libANN.so.1()(64bit)
You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
cairo-1.8.8-3.1.el6.x86_64 has missing requires of libpixman-1.so.0()(64bit)
As expected --skip-broken didn't lead to success as well.
After that I did multiple things: yum clean all, yum erase 'graphviz*', ann-libs installation, and yum update:
$ yum clean all
$ yum install 'graphviz*'
$ yum erase 'graphviz*'
$ cd ~/temp/
$ wget http://dl.fedoraproject.org/pub/epel/6/x86_64/ann-libs-1.1.1-4.el6.x86_64.rpm
$ rpm -i ann-libs-1.1.1-4.el6.x86_64.rpm
$ yum update
Now it works.