thodg/libgit2/cmake/Modules

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  • Hash : 87fc539f
    Author : Patrick Steinhardt
    Date : 2020-03-13T22:08:19

    cmake: use install directories provided via GNUInstallDirs We currently hand-code logic to configure where to install our artifacts via the `LIB_INSTALL_DIR`, `INCLUDE_INSTALL_DIR` and `BIN_INSTALL_DIR` variables. This is reinventing the wheel, as CMake already provide a way to do that via `CMAKE_INSTALL_<DIR>` paths, e.g. `CMAKE_INSTALL_LIB`. This requires users of libgit2 to know about the discrepancy and will require special hacks for any build systems that handle these variables in an automated way. One such example is Gentoo Linux, which sets up these paths in both the cmake and cmake-utils eclass. So let's stop doing that: the GNUInstallDirs module handles it in a better way for us, especially so as the actual values are dependent on CMAKE_INSTALL_PREFIX. This commit removes our own set of variables and instead refers users to use the standard ones. As a second benefit, this commit also fixes our pkgconfig generation to use the GNUInstallDirs module. We had a bug there where we ignored the CMAKE_INSTALL_PREFIX when configuring the libdir and includedir keys, so if libdir was set to "lib64", then libdir would be an invalid path. With GNUInstallDirs, we can now use `CMAKE_INSTALL_FULL_LIBDIR`, which handles the prefix for us.

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