OpenCascade missing installation path

[freman]

Hi, I've just installed a clean Fedora 33 system and I'm trying to reconstruction the master build I had running under Fed31.

I'm stuck on OpenCascade, which seems to have a null installation path:

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 cmake -S/svn/FreeCAD -DBUILD_FEM=OFF -DBUILD_QT5=ON -DPYTHON_EXECUTABLE=/usr/bin/python3  -DCCACHE_PROGRAM=  -DBUILD_OPENSCAD=OFF -DBUILD_SMESH=ON

....

cmake -S/svn/FreeCAD -DBUILD_FEM=OFF -DBUILD_QT5=ON -DPYTHON_EXECUTABLE=/usr/bin/python3  -DCCACHE_PROGRAM=  -DBUILD_OPENSCAD=OFF -DBUILD_SMESH=ON
CMake Deprecation Warning at CMakeLists.txt:8 (cmake_policy):
  The OLD behavior for policy CMP0072 will be removed from a future version
  of CMake.

.....

CMake Error at cMake/FindOpenCasCade.cmake:101 (file):
  file STRINGS file "//include/opencascade/Standard_Version.hxx" cannot be
  read.
Call Stack (most recent call first):
  cMake/FreeCAD_Helpers/SetupOpenCasCade.cmake:4 (find_package)
  CMakeLists.txt:51 (SetupOpenCasCade)

It's installed in /usr/local:

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bash-5.0#ls /usr/local/include
opencascade

Output seems to indicate there is a bug in the cmake process:

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  cMake/FindOpenCasCade.cmake:120 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  cMake/FreeCAD_Helpers/SetupOpenCasCade.cmake:4 (find_package)
  CMakeLists.txt:51 (SetupOpenCasCade)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- -- Found OCE/OpenCASCADE version: ..
-- -- OCE/OpenCASCADE include directory: //include/opencascade
-- -- OCE/OpenCASCADE shared libraries directory: //lib64

Even supplying the prefix does not seem to help ( though not sure if this is the right name ). Where can I find what it needs?

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OpenCASCADE_INSTALL_PREFIX="/usr"; cmake  -Wno-dev -S/svn/FreeCAD -DBUILD_FEM=OFF -DBUILD_QT5=ON -DPYTHON_EXECUTABLE=/usr/bin/python3  -DCCACHE_PROGRAM=  -DBUILD_OPENSCAD=OFF -DBUILD_SMESH=ON 

BTW any point in updating to newest release, I still have 7.3.0 , I see a few bug fixes.
Does anyone have a direct URL, I can't be bothered with opening an account and agreeing to user agreements etc.

Found it. I'll leave this up for information to others.

https://old.opencascade.com/sites/defau ... -7.5.0.tgz

Any suggestions?

TIA.

[freman]

I found the problem was I had cut and pasted package names from somewhere and already installed the Fedora Opencascade software.

This seems to totally confuse the cmake script leading the BS config data with a null prefix.

It seems to find something but screws up the path variable on the way through leaving code unbuildable.

This needs fixing.