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if(zstd_FOUND)
return()
endif()
if(USE_LIBZSTD_FROM_INTERNET)
# Although ${zstd_FIND_VERSION} was requested, let's download a newer version.
# Note: structure has changed in 1.3.0, download supports only 1.3.0 and
# newer.
set(zstd_version "1.4.4")
set(zstd_url https://github.com/facebook/zstd/archive/v${zstd_version}.tar.gz)
set(zstd_dir ${CMAKE_BINARY_DIR}/zstd-${zstd_version})
set(zstd_build ${CMAKE_BINARY_DIR}/zstd-build)
if(NOT EXISTS "${zstd_dir}.tar.gz")
file(DOWNLOAD "${zstd_url}" "${zstd_dir}.tar.gz")
endif()
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xf "${zstd_dir}.tar.gz"
WORKING_DIRECTORY "${CMAKE_BINARY_DIR}")
set(ZSTD_BUILD_SHARED OFF)
add_subdirectory("${zstd_dir}/build/cmake" "${zstd_build}" EXCLUDE_FROM_ALL)
add_library(ZSTD::ZSTD ALIAS libzstd_static)
set_target_properties(libzstd_static PROPERTIES INTERFACE_INCLUDE_DIRECTORIES
"${zstd_dir}/lib")
set(zstd_FOUND TRUE)
else()
find_library(ZSTD_LIBRARY zstd)
find_path(ZSTD_INCLUDE_DIR zstd.h)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
zstd "please install libzstd or use -DUSE_LIBZSTD_FROM_INTERNET=ON"
ZSTD_INCLUDE_DIR ZSTD_LIBRARY)
mark_as_advanced(ZSTD_INCLUDE_DIR ZSTD_LIBRARY)
add_library(ZSTD::ZSTD UNKNOWN IMPORTED)
set_target_properties(
ZSTD::ZSTD PROPERTIES IMPORTED_LOCATION "${ZSTD_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${ZSTD_INCLUDE_DIR}")
endif()
include(FeatureSummary)
# cmake-format: off
# (behaviour change in cmake-format 0.6.10)
set_package_properties(
zstd PROPERTIES URL "https://facebook.github.io/zstd"
DESCRIPTION "Zstandard - Fast real-time compression algorithm")
# cmake-format: on
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