Build issue on macOS about njoy21

[jlconlin]

What compiler versions did you use?

[brown170]

gcc (MacPorts gcc8 8.3.0_4) 8.3.0

The command line switch "-Wno-maybe-uninitialized" is identical to that on Linux.

[jlconlin]

We build regularly on Mac with gcc, but we don't use MacPorts. It seems unlikely that MacPorts is the issue. Will have to do some additional checking.

[brown170]

Might be useful to add a discussion of supported compilers on the NJOY21 website...

[jlconlin]

We do state what minimum compilers are required, but often state something like "clang 3.7+". Perhaps using the "+" is not precise enough. The documentation could certainly be improved.

[jlconlin]

We just made a change to NJOY21 that may help with this. It was addressed in Pull Request #93. Please try it out and let me know if it helps.

[brownjm1968]

I just ran into the same issue and solved with the same flag as Dave when building with gcc 9.2 (homebrew installed)

[jlconlin]

@brownjm1968 Can you tell me the commands that you used to compile NJOY21

[brownjm1968]

$ git clone https://github.com/njoy/NJOY21.git
$ cd NJOY21/
$ curl -O https://raw.githubusercontent.com/njoy/signatures/master/NJOY21/1.0.1-NJOY21.json
$ ./metaconfigure/fetch_subprojects.py 1.0.1-NJOY21.json 
$ mkdir bin
$ cd bin/
$ vim ../CMakeLists.txt 
$ cmake -D fetched_subprojects=true -D CMAKE_BUILD_TYPE=release ../
$ make -j7
$ make -j7 test

The vim command is where I added -Wno-maybe-uninitialized to the CMakeLists.txt file