w.pomp
4d366d1272
The eigen/ directory was a byte-identical copy of upstream libeigen/eigen tag 3.4.0 (commit 3147391d, the same release libCZI pins in cmake/ExternalEIGEN3.cmake). Replace the copy with a shallow git submodule (.gitmodules: shallow = true) for verifiable provenance and smaller fork. The Eigen3::Eigen interface config moves to eigen-cfg/Eigen3Config.cmake (the Eigen repo only ships the Eigen3Config.cmake.in template), and build.rs points Eigen3_DIR there.
25 lines
1.2 KiB
CMake
25 lines
1.2 KiB
CMake
# SPDX-License-Identifier: MPL-2.0
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#
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# CMake package interface for the Eigen submodule (eigen/), pinned at the
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# official tag 3.4.0 (commit
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# 3147391d946bb4b6c68edd901f2add6ac1f31f8c - the exact release libCZI pins in
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# its cmake/ExternalEIGEN3.cmake). The Eigen release tree only ships the
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# template cmake/Eigen3Config.cmake.in, which is expanded by Eigen's own CMake
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# build (deliberately skipped by libCZI), so this small config provides the
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# Eigen3::Eigen interface target used via
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# find_package(Eigen3 REQUIRED NO_MODULE)
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# with LIBCZI_BUILD_PREFER_EXTERNALPACKAGE_EIGEN3=ON.
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#
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# Eigen is header-only (MPL-2.0; see COPYING.MPL2 in the submodule) and the
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# submodule is checked out shallow (see .gitmodules), so libczirw-sys builds
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# need neither network access during the build (libCZI's default Eigen
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# ExternalProject clone from gitlab.com is flaky in CI), a full eigen git
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# history, nor a system libeigen3-dev package.
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if(NOT TARGET Eigen3::Eigen)
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get_filename_component(_eigen3_root "${CMAKE_CURRENT_LIST_DIR}/../eigen" ABSOLUTE)
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add_library(Eigen3::Eigen INTERFACE IMPORTED GLOBAL)
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set_target_properties(Eigen3::Eigen PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${_eigen3_root}")
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set(EIGEN3_INCLUDE_DIR "${_eigen3_root}")
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endif()
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