error: NOT FOUND! This is a REQUIRED/RUNTIME ONLY dependency. Please make sure that this dependency is installed before installing or running HPLIP.
error: NOT FOUND! This is a REQUIRED/RUNTIME ONLY dependency. Please make sure that this dependency is installed before installing or running HPLIP.
warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.
warning: NOT FOUND! This is an OPTIONAL/RUNTIME ONLY dependency. Some HPLIP functionality may not function properly.
error: NOT FOUND! This is a REQUIRED/COMPILE TIME ONLY dependency. Please make sure that this dependency is installed before installing or running HPLIP.
error: Could not access file: No such file or directory
error: 10 errors and/or warnings.
-----------
| SUMMARY |
-----------
Please refer to the installation instructions at:

http://hplip.sourceforge.net/install/index.html

Pretty insane though, many of these dependencies were already installed. I would assume that this would be the reason why hplip is not under active development for CentOS and why its not current under CentOS as I saw quite a few HP’s devs and techs saying a big “no” to this community based distribution when people complained on their Launchpad about these compilation errors. Plus, the relative hplip installation issues I found on CentOS’ forum.

After being in disappointed (oops wth) situation, I tried running the RHEL5′s rpm (can be downloaded from hplip’s site) on it after removing the source installed version, but it too gave the dependency errors which I hoped I would resolve and I did later on.

Installing……

# rpm -ivh /Raid/hplip-3.9.10_rhel-5.0.i386.rpm
Preparing...                ########################################### [100%]
 file /usr/bin/hpijs from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
 file /usr/lib/libhpip.so.0.0.1 from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
 file /usr/lib/sane/libsane-hpaio.so.1.0.0 from install of hplipfull-3.9.10-0.i386 conflicts with file from package libsane-hpaio-1.6.7-4.1.el5.4.i386

So, I decided to remove problematic hpijs

 Package                 Arch       Version          Repository        Size

Removing:
 hpijs                   i386       1:1.6.7-4.1.el5.4  installed         588 k
Removing for dependencies:
 libsane-hpaio           i386       1.6.7-4.1.el5.4  installed          94 k
 sane-backends           i386       1.0.18-5.el5     installed         3.1 M
 sane-backends-devel     i386       1.0.18-5.el5     installed          27 k
 sane-backends-libs      i386       1.0.18-5.el5     installed         5.2 M
 xsane                   i386       0.991-5.el5      installed         4.5 M

Transaction Summary
Install      0 Package(s)
Update       0 Package(s)
Remove       6 Package(s)

But realised soon that it also removed libsane sub-dependency as well.

# rpm -ivh /Raid/hplip-3.9.10_rhel-5.0.i386.rpm
error: Failed dependencies:
 libsane.so.1 is needed by hplipfull-3.9.10-0.i386
 

Because installing sane would also install hpijs and other conflicting stuff as well so the solution here was to remove problematic packages without ‘removing’ any dependencies needed.

[root@ToughGuy ~]# rpm -ivh /Raid/hplip-3.9.10_rhel-5.0.i386.rpm
Preparing...                ########################################### [100%]
 file /usr/bin/hpijs from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
 file /usr/lib/libhpip.so.0.0.1 from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
 file /usr/lib/sane/libsane-hpaio.so.1.0.0 from install of hplipfull-3.9.10-0.i386 conflicts with file from package libsane-hpaio-1.6.7-4.1.el5.4.i386
#
# rpm -ev --nodeps libsane-hpaio
# rpm -ivh /Raid/hplip-3.9.10_rhel-5.0.i386.rpm
Preparing...                ########################################### [100%]
 file /usr/bin/hpijs from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
 file /usr/lib/libhpip.so.0.0.1 from install of hplipfull-3.9.10-0.i386 conflicts with file from package hpijs-1.6.7-4.1.el5.4.i386
#
# rpm -ev --nodeps hpijs
#
# rpm -ivh /Raid/hplip-3.9.10_rhel-5.0.i386.rpm
Preparing...                ########################################### [100%]
 1:hplipfull              ########################################### [100%]
#

Concluding the overall steps:

# yum install cups cups-devel ghostscript* PyQt xsane -y
# Download and install hplip-3.9.10_rhel-5.0.i386.rpm from http://hplipopensource.com/hplip-web/install_wizard/index.html choosing RHEL5.
# rpm -ev --nodeps libsane-hpaio
# rpm -ev --nodeps hpijs
# rpm -ivh hplip-3.9.10_rhel-5.0.i386.rpm
# Reboot the system if you're lucky enough, you'll see no errors
# reboot
# system-config-printer

And configure the printer now as usual. Just out of curiosity, this was my XenServer where I installed it (yea I know it would sound funny) and I got scanner (LaserJet M1120 is dual scanner and printer) working fine as well with xsane. Check it out

Scan Test HP LaserJet M1120 MFP

NOTE: If this post helped you out or provided you with ways of troubleshooting, feel free to say a little thanks