Meson: Use unknown argument `-C` when calling older version `git`

[li-xin-yi]

I didn't install glib properly when I used meson to build pango. So it will automatically download the dependencies for me before actual building. But my older version git (1.8.3.1, I know it is really old enough, but the server is provided by my campus, I have no privilege to update it) cannot recognize the flag -C, which is specified in mesonlib.py#L70). Can you replace it with a more flexible way?

[scivision]

Older Git could be accommodated here internally with the cwd= argument to subprocess. I am not aware of any downside to this. As a personal choice, I generally avoid using cwd= to make the command self-contained--that's just a syntax preference with no technical justification that i know of.

This is something that should be decided and done all one way or all the other way (for Git) just to keep things project-standard.

[eli-schwartz]

It shouldn't be hard to build a newer git version and install it to $HOME.

Are there other new features of git which are being used in meson, that this old version doesn't support? If meson wants to be backwards-compatible with git 1.8 it should make sure everything works there...