eigen.cmake
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function(download_eigen)
include(FetchContent)
set(eigen_URL "https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz")
set(eigen_URL2 "https://hf-mirror.com/csukuangfj/sherpa-onnx-cmake-deps/resolve/main/eigen-3.4.0.tar.gz")
set(eigen_HASH "SHA256=8586084f71f9bde545ee7fa6d00288b264a2b7ac3607b974e54d13e7162c1c72")
# If you don't have access to the Internet,
# please pre-download eigen
set(possible_file_locations
$ENV{HOME}/Downloads/eigen-3.4.0.tar.gz
${CMAKE_SOURCE_DIR}/eigen-3.4.0.tar.gz
${CMAKE_BINARY_DIR}/eigen-3.4.0.tar.gz
/tmp/eigen-3.4.0.tar.gz
/star-fj/fangjun/download/github/eigen-3.4.0.tar.gz
)
foreach(f IN LISTS possible_file_locations)
if(EXISTS ${f})
set(eigen_URL "${f}")
file(TO_CMAKE_PATH "${eigen_URL}" eigen_URL)
message(STATUS "Found local downloaded eigen: ${eigen_URL}")
set(eigen_URL2)
break()
endif()
endforeach()
set(BUILD_TESTING OFF CACHE BOOL "" FORCE)
set(EIGEN_BUILD_DOC OFF CACHE BOOL "" FORCE)
FetchContent_Declare(eigen
URL ${eigen_URL}
URL_HASH ${eigen_HASH}
)
FetchContent_GetProperties(eigen)
if(NOT eigen_POPULATED)
message(STATUS "Downloading eigen from ${eigen_URL}")
FetchContent_Populate(eigen)
endif()
message(STATUS "eigen is downloaded to ${eigen_SOURCE_DIR}")
message(STATUS "eigen's binary dir is ${eigen_BINARY_DIR}")
add_subdirectory(${eigen_SOURCE_DIR} ${eigen_BINARY_DIR} EXCLUDE_FROM_ALL)
endfunction()
download_eigen()