Finding LibArchive on GitHub Action

Usage
1

For some reason I cannot convince CMake to find LibArchive! On my local machine, I don’t have any problem but when I’m trying to setup the CI on Github, find_package(LibArchive) just doesn’t work (even though I expect Xcode to have a version of it), I also tried installing it via brew and no luck again, I now have this, which doesn’t work either. I have confirmed by pkg-config --libs libarchive that the library indeed exists but CMake keeps missing it for some reason. I’m using macos-11 and xcode-13.2 on GitHub Action environment.

find_package(LibArchive)
if(NOT LibArchive_FOUND)
  find_package(PkgConfig REQUIRED)
  pkg_check_modules(
    LibArchive
    REQUIRED
    IMPORTED_TARGET
    libarchive)
endif()

I even set the PKG_CONFIG_PATH as follow before running my CMake config, and I can see that the variable is set correctly, but I guess for some reason CMake cannot read and set it.

      - name: Setting up the Environment Variables
        run: |
          export PKG_CONFIG_PATH="/usr/local/opt/zlib/lib/pkgconfig:/usr/local/opt/openssl@3/lib/pkgconfig:/usr/local/opt/qt/lib/pkgconfig:/usr/local/opt/libarchive/lib/pkgconfig:/usr/local/Cellar/libarchive/3.5.2/lib/pkgconfig"
          echo "PKG_CONFIG_PATH: ${PKG_CONFIG_PATH}"
          pkg-config --libs libarchive

I can pass the path to CMAKE_PREFIX_PATH like -DCMAKE_PREFIX_PATH=/usr/local/opt/libarchive but then I cannot pass more than one path there. I have tried to pass a list of paths, but that doesn’t seem to work.

I would also really like to understand why setting PKG_CONFIG_PATH doesn’t work because I certainly have more work to do with PkgConfig and it would be great if I figure this out.

I appreciate any help! :blush:

2

The paths need to be semicolon-separated. There is also the CMAKE_PREFIX_PATH environment variable that uses the system separator instead (on macOS, :).

I would suggest using --trace-expand to see what command is actually being executed for pkg-config

3

The paths need to be semicolon-separated. There is also the CMAKE_PREFIX_PATH environment variable that uses the system separator instead (on macOS, : ).

That’s probably what confused me a bit. I’m going to try it.

I have tried --trace, but I was not sure what’s happening. I’m going to try this and report! :slight_smile: