cmake: Use standard CMAKE_INSTALL_INCLUDEDIR
#347
Merged
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Current code uses hard-coded
include
orCMAKE_INSTALL_INCDIR
to specify included directories. It makes the installed target not work with Nix, which tries to split headers into a different package.https://github.com/NixOS/nixpkgs/blob/7cb6229334cecda7592a6df2a23a2d19549044f1/pkgs/build-support/setup-hooks/multiple-outputs.sh#L150-L165
CMAKE_INSTALL_INCLUDEDIR
is CMake’s recommended standard for setting header location. It allows package maintainers like Nix to control the install destination by setting appropriate cache variables.https://github.com/NixOS/nixpkgs/blob/7cb6229334cecda7592a6df2a23a2d19549044f1/pkgs/development/tools/build-managers/cmake/setup-hook.sh#L91-L103