CODEWITHSUNDEEP
c++cmakepkg-configconan
hrantzsch
hrantzsch

Reputation: 363

How to find .pc files for pkg-config via Conan and CMake

How can I make pkg-config find both dependencies installed via Conan AND dependencies that are not in Conan?

My target package is built using CMake and finds its dependencies using pkg-config with pkg_check_modules(). One of the dependencies (glib-2.0) is installed via Conan, another (libsecret-1) isn't, as there's no package.

In my conanfile I'm configuring the pkg-config_installer as a build requirement (self.build_requires("pkg-config_installer/0.29.2@bincrafters/stable"). When building the package, CMake correctly invokes this pkg-config.

As a result, pkg-config finds glib just fine, but it cannot find libsecret. I assume it finds .pc files for dependencies installed via Conan, but doesn't find libsecret-1.pc, which is located in /usr/lib/pkgconfig/ on my system.

I tried telling Conan's CMake tool to use this path: tools.PkgConfig("libsecret-1").variables["pcfiledir"] tells me where it is and the CMake tool's configure method has a pkg_config_paths parameter. Unfortunately, this changes nothing.

Upvotes: 0

Views: 1653

Answers (1)

hrantzsch
hrantzsch

Reputation: 363

The following steps made it work for me:

  • set the PKG_CONFIG_PATH environment variable to the pcfiledir found by tools.PkgConfig
  • do not to pass any pkg_config_paths to tools.CMake.configure(), it doesn't handle absolute paths well and conflicts with the environment variable
  • add the system-wide installed lib (secret-1 in my case) to cpp_info.system_libs in the package_info step

Thanks @uilianries for the helpful comment!

Upvotes: 0

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