Add -DBLAKE3_USE_TBB to pkg-config CFLAGS

[silvanshade]

This PR adds -DBLAKE3_USE_TBB to the pkg-config CFLAGS.

Can you please try to include this before the next release with #460? Thanks.

@BurningEnlightenment @oconnor663

[BurningEnlightenment]

ugh, it would be nice if the world converged on a universal dependency-spec standard with built-in support in all major build tools.

[Ericson2314]

ugh, it would be nice if the world converged on a universal dependency-spec standard with built-in support in all major build tools.

FWIW, some CMake and Meson devs are jointly working on such a thing: https://cps-org.github.io/cps/index.html#

[oconnor663]

I'll cut a release now. Out of curiosity, pushing a new tag to GitHub affect our callers that use CMake? Is there a dependency fetching mechanism that fetches the latest tag or anything like that?

[BurningEnlightenment]

Out of curiosity, pushing a new tag to GitHub affect our callers that use CMake? Is there a dependency fetching mechanism that fetches the latest tag or anything like that?

Nothing built-in but vcpkg & conan only update their ports to official tags. And of course there are probably a bunch of home-grown FetchContent based solutions which are free to do anything.

[oconnor663]

Released as v1.8.1.

[BurningEnlightenment]

FWIW, some CMake and Meson devs are jointly working on such a thing: https://cps-org.github.io/cps/index.html#

@Ericson2314 Back when CPS was first submitted to the ISO mailing list in 2018, I sort of expected that the initiative would go nowhere and fizzle out, but apparently they added experimental support¹ in CMake 3.31 and published a blog post about it this week. Though meson seems to still hold off on implementing. Interesting indeed.

_{Now we only have to wait 6+ years until all LTS Distros shipping incompatible build-systems are out of support 🙃}

Footnotes

1. https://cmake.org/cmake/help/latest/command/install.html#package-info ↩