Great, thank you for the pointers @yrrapt. I've recloned the

bag3

develop branch on two separate machines, one with

CentOS 7.9

and the other with

Ubuntu 20.04.

On each, I built a fresh python venv, and tried compiling the

bag

and

pybag

modules. In each case, the

bag

modules built properly, but the sub-module

pybag

is problematic. I've tried to read the

CMakeLists.txt

and follow the error

build.log

, to find clues about what packages might be missing or variables not configured, but no luck so far. My machines have the following: CentOS 7.9 • Python 3.9.14 (built from source) • CMake 3.17.5 • fmt 8.22 • Boost 1.53.0 • gcc 7.3.1 Ubuntu 20.04 • Python 3.8.10 • CMake 3.16.3 • fmt 8.30 • Boost 1.71.0 • gcc 9.4.0 Running

python -m pip install .

, I'm seeing build logs that contain the error below.

in ./build.log
....
    CMake Error at cbag/CMakeLists.txt:94 (find_package):
      Could not find a package configuration file provided by "fmt" with any of
      the following names:
    
        fmtConfig.cmake
        fmt-config.cmake
    
      Add the installation prefix of "fmt" to CMAKE_PREFIX_PATH or set "fmt_DIR"
      to a directory containing one of the above files.  If "fmt" provides a
      separate development package or SDK, be sure it has been installed.
....

I think I need to point

CMake

toward my

fmt

and

spdlog

installs.