eli-schwartz commented on issue #36411:
URL: https://github.com/apache/arrow/issues/36411#issuecomment-2738362494
> you didn't mean to include cmake itself in that list? You mean for other
tools like Meson or Bazel?
:eyes: you saw nothing
> Typically you will also want to specify whether the target is a
shared/static library
I guess that could be done with find_library + hints too, right?
> The main trick is ensuring that the file is relocatable, so ideally at the
top you'll have paths set based on the `CMAKE_CURRENT_LIST_DIR` or a template
variable that's filled in by a CMake `configure_file` call.
Yup, same way that meson sets a template variable `prefix=/usr` or for
relocatable files, `prefix=${pcfiledir}/../../`.
IIRC `${CMAKE_CURRENT_LIST_DIR}` is, like `${pcfiledir}`, defined as "the
directory in which the currently processing file is located". The only slightly
complicated part there is building `../../` correctly (you want meson's
[`fs.relative_to()`](https://mesonbuild.com/Fs-module.html#relative_to) or
cmake's [`cmake_path(RELATIVE_PATH
)`](https://cmake.org/cmake/help/latest/command/cmake_path.html#relative-path)
to compute the path back from the file's install directory to the relocatable
install prefix).
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