Error trying to link with osgText and freetype - linux

Question

I've already checked dozens of web pages and configurations about this.
I'm desperate because I really need to use this feature and soon.
These are my settings:
Language: C++
Libraries: OpenSceneGraph (OSG) v3.2.0
OS: Xubuntu 14.04 (on a VMWare Player virtual machine)
I am compiling an example from the book "OpenSceneGraph 3.0 - Beginner's Guide", pages 297-299, regarding the use of Text on OSG, which requires an additional plug-in, freetype (http://www.freetype.org/), which is installed.
The example compiles correctly.
I think I have all the required include files and libraries.
The problem comes in the link phase. It always gives me this error:
/usr/bin/ld: CMakeFiles/osg_demos.dir/osg_demos.cpp.o: undefined reference to symbol '_ZN7osgText12readFontFileERKSsPKN5osgDB7OptionsE'
//usr/lib/libosgText.so.99: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[2]: *** [osg_demos] Error 1
make[1]: *** [CMakeFiles/osg_demos.dir/all] Error 2
make: *** [all] Error 2
I checked that I have the files:
"/usr/lib/libosgText.so.99" which is a link to the actual lib file:
"libosgText.so.3.2.0".
"/usr/lib/osgPlugins-3.2.0/osgdb_freetype.so"
the external dependency of the osgText library.
I ran out of ideas. :(
Can someone help me?
My question stops here, but in case you want to check my files, please find them below.
The code responsible for this problem:
osgText::Text* createText( const osg::Vec3& pos,
const std::string& content, float size ) {
osg::ref_ptr<osgText::Font> g_font = osgText::readFontFile("arial.ttf");
osg::ref_ptr<osgText::Text> text = new osgText::Text;
text->setFont( g_font.get() );
text->setCharacterSize( size );
text->setAxisAlignment( osgText::TextBase::XY_PLANE );
text->setPosition( pos );
text->setText( content );
return text.release();
}
These are the Include files that I am using which are specific to osgText operations, apart from all the others that I already need on my project:
#include <osg/Camera>
#include <osgText/TextBase>
#include <osgText/Font>
#include <osgText/Text>
This is my "CMakeLists.txt" file:
cmake_minimum_required( VERSION 2.6 )
project( OSG_DEMOS )
find_package( OpenThreads )
find_package( osg )
find_package( osgDB )
find_package( osgGA )
find_package( osgUtil )
find_package( osgViewer )
find_package( osgText ) # Needed for demo: writeText()
find_package( osgShadow ) # Needed for demo: writeText()
find_package( osgParticle ) # Needed for demo: writeText()
find_package( osgFX ) # Needed for demo: writeText()
find_package(PCL 1.6 COMPONENTS)
set(CMAKE_CXX_FLAGS "-g -Wno-deprecated")
macro( config_project PROJNAME LIBNAME )
include_directories( ${${LIBNAME}_INCLUDE_DIR} )
target_link_libraries( ${PROJNAME} ${${LIBNAME}_LIBRARIES} )
endmacro()
add_executable(osg_demos osg_demos.cpp)
config_project(osg_demos OPENTHREADS )
config_project(osg_demos OSG )
config_project(osg_demos OSGDB )
config_project(osg_demos OSGGA )
config_project(osg_demos OSGUTIL )
config_project(osg_demos OSGVIEWER )
config_project(osg_demos osgText )
config_project(osg_demos osgShadow )
config_project(osg_demos osgParticle )
config_project(osg_demos osgFX )

Answer 1

The problem was on the "CMakeLists.txt" file.
Apparently, the config_project macro requires all uppercase letters. I don't exactly understand why.
To make the project link correctly, I switched to uppercase the reference to library name on the last four lines of that file, like:
config_project(osg_demos OSGTEXT )
instead of:
config_project(osg_demos osgText )
What a nightmare just because of this...