Linking Error When Compiling

[ezzieyguywuf]

I am trying to compile freecad and get the following error:

[ 2%] Linking CXX shared library ../../../lib/libDriver.so
/usr/bin/ld: cannot find -lTKFillet
/usr/bin/ld: cannot find -lTKMesh
/usr/bin/ld: cannot find -lTKernel
/usr/bin/ld: cannot find -lTKG2d
/usr/bin/ld: cannot find -lTKG3d
/usr/bin/ld: cannot find -lTKMath
/usr/bin/ld: cannot find -lTKIGES
/usr/bin/ld: cannot find -lTKSTL
/usr/bin/ld: cannot find -lTKShHealing
/usr/bin/ld: cannot find -lTKXSBase
/usr/bin/ld: cannot find -lTKBin
/usr/bin/ld: cannot find -lTKBool
/usr/bin/ld: cannot find -lTKBO
/usr/bin/ld: cannot find -lTKBRep
/usr/bin/ld: cannot find -lTKTopAlgo
/usr/bin/ld: cannot find -lTKGeomAlgo
/usr/bin/ld: cannot find -lTKGeomBase
/usr/bin/ld: cannot find -lTKOffset
/usr/bin/ld: cannot find -lTKPrim
/usr/bin/ld: cannot find -lTKSTEP
/usr/bin/ld: cannot find -lTKSTEPBase
/usr/bin/ld: cannot find -lTKSTEPAttr
/usr/bin/ld: cannot find -lTKHLR
/usr/bin/ld: cannot find -lTKFeat
/usr/bin/ld: cannot find -lTKCAF
/usr/bin/ld: cannot find -lTKXCAF
/usr/bin/ld: cannot find -lTKLCAF
/usr/bin/ld: cannot find -lTKXDESTEP
/usr/bin/ld: cannot find -lTKXDEIGES
/usr/bin/ld: cannot find -lTKMeshVS

I've been able to compile it before without any issues. I did have a few copies of opencascade floating around, and uninstalled the one I had in /usr/local. I've made sure using cmake-gui, though, that FreeCAD searches in /opt/opencascade for the include files and libraries. Any idea what I may be missing?

[wmayer]

I guess that it linked exactly this version under /usr/local. Make sure that OCC_LIBRARY_DIR points to the new directory. However, sometimes it's really hard to fix the cmake cache files and then it's easier to delete your whole build directory and start cmake configure from scratch.

[ezzieyguywuf]

I tried the following:

1) Create new build directory
2) run cmake .. from new build directory
3) run cmake-gui .. and set the following variables:
- OCE_DIR = /opt/opencascade
- OCC_INCLUDE_DIR = /opt/opencascade, default was /usr/local somewhere
- OCC_LIBRARY = /opt/opencascade/lib, default was /opt/opencascade/lib/libSomething.so, can't remember which specific so file

Same issue. It seems like FreeCAd tries to re-find the OCE_DIR and it can't, b/c it resets it to Null.

[wandererfan]

Same issue. It seems like FreeCAd tries to re-find the OCE_DIR and it can't, b/c it resets it to Null.

For what it's worth, I often have to change OCE-DIR and run configure several times in Cmake-gui before the change sticks. Sometimes changing something unrelated like CMAKE_CXX_COMPILER will knock OCE-DIR back to a useless value.

Eventually the change sticks.

wf

[ezzieyguywuf]

The oce_dir thing confuses me. It asks for a for with a cmake file for oce. But I'm using occ. and then there are vars for occ_include_dir and occ_lib_dir but none for oce. I'm left scratching my head as to what's what.

Well, I promised my dear wife I'd take a break for a week, so I'll investigate this then.

[wandererfan]

It asks for a for with a cmake file for oce. But I'm using occ.

As far as Cmake is concerned, "OCC" and "OCE" are interchangeable.

[ezzieyguywuf]

I think there is some sort of error in the CMakeLists.txt file.

When I use cmake-gui to set the OCC_LIBRARY variable, if I set it to the directory that contains my libraries it ends up searching one directory higher. I saw this by running make VERBOSE=1. If I select one of the object files in the library directory, then it ends up searching the correct directory.

[wmayer]

No, you must specify a file path and not a directory path.

[ezzieyguywuf]

But which file must be specified? There are tons of so files in the library directory. Why does the OCC_INCLUDE variable accept a directory rather than a file?

[wmayer]

It should work with any file there.