ZUO Zhihua

Hello, your open source `ctsa` is great! It is a comprehensive and modern time series analysis package. [Fortran-Lang](https://fortran-lang.org/) is rebuilding its community. I **personally** want to use your `ctsa` package...

Indeed, technically, fpm is currently unable to support gsl's mixed-language programming. Agreed to close this issue.

> Should it be a simple wrapper, or something more complete (similar to @awvwgk [BLAS interfaces](https://github.com/awvwgk/blas-interface)). @jvdp1 I'm not worried about this, and it shouldn't be too complicated to switch...

Support for multiple source file paths seems to be a new feature, and it seems good to create an example for it in `example_packages` folder and test it out?

### Update read_lines using binary reading I tried to read text files in `C` and found it much faster than `Fortran`. Taking a cue from @Euler-37 , I used the...

### Ensure thread safety For thread-safety, local allocatable arrays are used to record the start and end indexes of the lines, which **reduces performance a bit**, but may be able...

This PR changes the way fpm reads text files from reading characters by line to reading all binary bytes at once, which may reduce the time it takes to read...

Thanks for reviewing, @henilp105 . Okay, nothing more to add, let's merge it.

**We use `fpm update --clean` to update dependencies and their names.** However, there is indeed such a problem. When the new data does not match the cache, we will tend...

I also think this is a good idea. This approach, I believe, has a certain amount of work, but it's okay. Maybe we can change the kind of `fftpack` like...