consider a header only release

[weegreenblobbie]

I would love to use this library! I recently started using catch.hpp, a header-only unit test framework.

How hard would it be to create a single header release of fmt?

[amc522]

Optional header-only configuration enabled with the FMT_HEADER_ONLY macro.

Last item in the features list in the README

[weegreenblobbie]

Nice! So I need to download and build the header only configuration? Or do I save all the code and then define the macro in my build system?

[amc522]

I've never used cmake to build the header, but a quick scan through looks like it does generate one header if the cmake version is greater than or equal to 3.1.0. I've personally just included all the *.h and *.c files in my source and just globally defined FMT_HEADER_ONLY.

[weegreenblobbie]

Thanks, I'll give building into single header a try.

[weegreenblobbie]

Well, cmake won't build a single header file, it looks like catch.hpp wrote some custom .py scripts to glob them all together into a single header. Would that be something this project would be interested in? I may contribute a pull request if so.

[weegreenblobbie]

I decided to just do this instead. Download the library, then write my own fmt.hpp with this:

// https://github.com/fmtlib/fmt

#ifndef _FMT_HPP_
#define _FMT_HPP_

#ifndef FMT_HEADER_ONLY
    #define FMT_HEADER_ONLY
#endif

#include <fmt/format.h>

#endif // _FMT_HPP_
`