Add Fortran libraries

[partouf]

Installs and builds fortran libraries

Todo:

• Test with Conan
• Test with CE

[partouf]

How fpm build roughly works: (see fpm build --verbose)

• downloads the dependencies and builds them etc
• builds the library, actually makes a lib*.a file as well
• When compiling the main program:
• • passes to gfortran: -J build/folderwithallthemodfiles -Ibuild/folderwithallthemodfiles
• • links without mentioning dependencies

So I don't think we have to do anything with the .a files, but package the directory with the .mod files instead
However, the directory name is dynamically named (e.g. gfortran_5EC35857C81A7F73) and I'm not sure how to get that name other than looking at the filenames

[partouf]

Actually.. it might be always called gfortran_5EC35857C81A7F73 or probably compilerexename + _5EC35857C81A7F73

But there's no easy to find documentation on this

[partouf]

or maybe not, seemed to be a coincidence that I stumbled upon the same directory name

Problem is now a chicken and egg problem where I do not know the name of the directory where the .mod files go, and thus I cannot make a conanfile.py to get the right hash to check in conan if the library has already been uploaded...

[partouf]

And the fpm hash depends on the compile flags and arguments https://github.com/fortran-lang/fpm/blob/498bc484e7cb72f06c529033f9057ffce35468e6/src/fpm_targets.f90#L975 - so there's no real way to know that beforehand..

[partouf]

And the fpm hash depends on the compile flags and arguments https://github.com/fortran-lang/fpm/blob/498bc484e7cb72f06c529033f9057ffce35468e6/src/fpm_targets.f90#L975 - so there's no real way to know that beforehand..

fixed this by just using a */*.mod pattern in the conanfile, crisis averted

[partouf]

Also implemented a new endpoint to directly download shared libraries like curl from our conan server with https://conan.compiler-explorer.com/downloadcshared/libid/version (the signature kept changing so the urls kept going out of date)

[partouf]

The conan package will look like this:

• lib
  • libjson-fortran.a
• mod
  • json_module.mod
  • json_file_module.mod
  • etc

[partouf]

Need to fix all the lintchecks, but otherwise this is good to go