Hello,

I am really having a hard time with a few installations. I'm trying to install cairo-png, libxml2 (I think this is installed), rddtool and ultimately Smokeping. Unfortunately, for me (in a way), I was put in a precarious position overseeing some Linux machines for work. I would love to learn, but I was abruptly put into the position. I'm not a ninja when it comes to Linux unfortunately.

Here it is: I have no idea what the pkg-config file is or how I would set the variable for some of these installs. Below are some of the errors I'm getting when I try to install. First I tried installing RDDtool from this page:

http://oss.oetiker.ch/rrdtool/doc/rr...en.html#___top

I get to this step.

I used RDD_INSTALL_DIR instead of INSTALL_DIR from previous step. I'm not sure if that matters when setting the variable. When I execute it, I get WARNINGS about cairo-png, cairo-svg, cairo-pdf.pc, cairo-ps.pc, cairo-ps, pangocairo.pc, pangocairo, ibxml-2.0.pc and libxml-2.0. In each WARNING, it tells me to configure the PKG_CONFIG_PATH variable. Do I do that for every warning?

configure: WARNING:
When I check the config.log, it's not much help. It's all in "Greek." I think I installed the libxml2 components correctly; I also created a symlink in /opt/libxml2/:

I'm not sure how to use the CPPFLAGS option for the ./configure and if I need to create PKG_CONFIG_PATH variables for EVERY WARNING that was listed when trying to install RDDtool (viz, cairo-png, cairo-svg, cairo-pdf.pc, cairo-ps.pc, cairo-ps, pangocairo.pc, pangocairo, ibxml-2.0.pc and libxml-2.0). Sorry for the list.

"pkgconfig" provides some configuration information about software; it isn't supported by all software, but for the ones that do support it, if you use a pre-built package you usually only get the config information if you install the corresponding "dev" package for it. Installing the 'dev' package is required if you wish to link to that software anyway.

Hello,

I still don't know how that will help me set up RRDtool. What devices do I need to install? It didn't say anything about installing any devices. I'm confused.

I never said anything about devices. The "dev" packages are the development packages for the libraries you've installed. For RRDtool for example, you will need to install headers for:

libc6
libfontconfig1
libpixman-1
libpng12
libx11
libxcb-render-util
libxcb-render
libxcb1
libxrender1
zlib1g

Thank you for your reply.

Sorry, when I saw dev I was thinking devices. How do I install the headers?

You'll have to use your package manager to search for the files which provide the headers for each library. Usually it's the same package name with "-dev" or "-devel" or something like that.

Hello pinniped,

I still don't follow. Am I querying RPM for this?

RPM should be able to help you find what you need; even if you only searched for 'cairo' it should show you the cairo library as well as the development files.

Here is my result:

When you mean header do you mean the part of the file that begins with the "bang?"

If I were creating a Bash Script, I would add this? If so, how do I know which files to modify?

i have the same error when i am trying to install rrd tools, and i try this

yum install cairo-devel libxml2-devel pango-devel pango libpng-devel freetype freetype-devel libart_lgpl-devel

it's fixed my problem

Same error here. Thank you it fix my issue.
After that you also need to create you variable

[root@host01 ~]# export PKG_CONFIG_PATH=/usr/lib/pkgconfig/