Problem compiling building osgEarth on Red Hat Linux 7.9

[faculaganymede]

osgEarth Gurus,

I need help with compiling and building osgEarth 3.3 on Red Hat Linux 7.9.

Following the instructions on the osgEarth website, I successfully installed the osgEarth SDK using vcpkg. Next, I download the source code from GitHub and tried to compile and build it but ran into the following errors. I didn't modify any of the cmake files and assumed that they would work out of the box.

vcpkg install osgearth:x64-linux

git clone --recurse-submodules https://github.com/gwaldron/osgearth.git osgearth
cd osgearth
mkdir build
cd build

cmake -S .. -B . -DCMAKE_BUILD_TYPE=RelWithDebInfo -DWIN32_USE_MP=ON -DCMAKE_INSTALL_PREFIX=/home/facula/osgearth -DCMAKE_TOOLCHAIN_FILE=/home/facula/vcpkg/scripts/buildsystems/vcpkg.cmake

cmake --build . --config RelWithDebInfo

[ 53%] Built target osgEarth
[ 53%] Built target osgdb_basis
[ 53%] Built target osgdb_osgearth_bumpmap
[ 54%] Built target osgdb_osgearth_cache_filesystem
[ 54%] Built target osgdb_osgearth_colorramp
[ 55%] Built target osgdb_osgearth_detail
[ 55%] Built target osgdb_draco
[ 56%] Built target osgdb_earth
[ 60%] Built target osgdb_osgearth_engine_rex
[ 60%] Built target osgdb_osgearth_featurefilter_intersect
[ 60%] Built target osgdb_osgearth_featurefilter_join
[ 60%] Built target osgdb_gltf
[ 65%] Built target osgdb_kml
[ 66%] Built target osgdb_osgearth_mapinspector
[ 66%] Built target osgdb_osgearth_monitor
[ 67%] Built target osgdb_osgearth_scriptengine_javascript
[ 68%] Built target osgdb_osgearth_sky_gl
[ 69%] Built target osgdb_osgearth_sky_simple
[ 70%] Built target osgdb_template
[ 71%] Built target osgdb_osgearth_terrainshader
[ 71%] Built target osgdb_webp
[ 73%] Built target osgdb_lerc
[ 73%] Built target osgdb_osgearth_vdatum_egm2008
[ 73%] Built target osgdb_osgearth_vdatum_egm84
[ 74%] Built target osgdb_osgearth_vdatum_egm96
[ 74%] Built target osgdb_osgearth_viewpoints
[ 75%] Built target osgdb_fastdxt
[ 75%] Linking CXX executable ../../../bin/osgearth_viewer
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcDefaultSubstitute'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcPatternDestroy'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `LZ4_compress_HC'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `shm_unlink'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `LZ4_compress_fast'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `snappy_compress'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcNameParse'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `LZ4_decompress_safe'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcInitLoadConfigAndFonts'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcFontMatch'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `shm_open'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcConfigSubstitute'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `FcPatternGetString'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `snappy_uncompress'
../../../lib/libosgEarth.so.3.3.0: undefined reference to `snappy_max_compressed_length'
collect2: error: ld returned 1 exit status
gmake[2]: *** [bin/osgearth_viewer] Error 1
gmake[1]: *** [src/applications/osgearth_viewer/CMakeFiles/application_osgearth_viewer.dir/all] Error 2
gmake: *** [all] Error 2

Your help is greatly appreciated!

[robertosfield]

The best place to ask questions about osgearth is on the osgearth Issue tracker or their Discussion forum.

https://github.com/gwaldron/osgearth

[faculaganymede]

Thank you Robert! I originally tried the osgEarth Discussion Forum suggested on the osgEarth site but it lead to an empty page.

[robertosfield]

Perhaps the forum.osgearth.org was the old forum that they've now removed but the an old placeholder is now there. If you haven't already it would be worth informing the github osgearth forum about the broken link. Or perhaps @gwaldron or @jasonbeverage can spot this discussion here :-)

[jasonbeverage]

I saw you asked this question in the osgearth GitHub, I'll try to answer over there.