Mark static_flag and shared_flag as deprecated

[yshui]

They are meaningless since cc-rs only generates static libraries. Having them does nothing and only causes confusion.

Closes #1444
Closes #594

[NobodyXu]

We can have these functions deprecated, but we cannot just remove them as it would break compatibility and release a 2.0.0 release

[yshui]

emmm, can we create a version 2.0 branch then? i can change the PR target.

[NobodyXu]

We have absolutely no plan for 2.0, that'll just render too many build script to stick to a 1.0 version so we'd either backport to maintain 1.0 or give them up, which is not realistic

[yshui]

huh, and people really are using them even if they do nothing.

how about i also add a doc(hidden)?

[NobodyXu]

huh, and people really are using them even if they do nothing.

Thanks this reminds me, some does use it to build shared lib I think?

how about i also add a doc(hidden)?

Hmmm no that's bad, I'd prefer deprecated if we really want to do that

[yshui]

use it to build shared lib I think?

it won't work though. all they would get is liblibfoo.so.a.

[NobodyXu]

Thank you!

can you fix the semver-checks CI?

I think we would need to add

with:
  release-type: minor

to

cc-rs/.github/workflows/main.yml

Line 436 in 1ca8b2a

- name: Check semver

[NobodyXu]

This PR just need a rebase

[NobodyXu]

Thanks