The build system should check whether pkg-config is installed

[Yoric]

I had a few difficulties building rav1e, which showed up as $git_desc being undefined in some Perl script. Turns out I had forgotten to install pkg-config.

It would be a bit nicer if the configure step could check that.

[lu-zero]

pkg-config should do that already... How did you end up in that situation exactly?

[Yoric]

I'm on macOS, I just ran

1. git clone ...
2. git submodule update --init
3. cargo build

Here's the output:
backtrace.log

Installing pkg-config with homebrew seems to have fixed the issue.

[lu-zero]

On readme we have:

In order to build, test and link to the codec on UNIX, you need Perl, Yasm, CMake, Clang and pkg-config. To install this on Ubuntu or Linux Mint, run:

sudo apt install perl yasm cmake clang pkg-config

On Windows, pkg-config is not required. A Perl distribution such as Strawberry Perl, CMake, and a Yasm binary in your system PATH are required.

Might be a good idea reporting to pkg-config that it should provide a friendlier error message.

[lu-zero]

rust-lang/pkg-config-rs#56 is tracking this issue already.

[rzumer]

Closing, as this should be fixed on pkg-config-rs's end if the error message is not displayed as expected (it should be, based on the probe() function).