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mark_as_advanced(XXHASH_INCLUDE_DIR XXHASH_LIBRARY)
if(DEPS STREQUAL "DOWNLOAD" OR DEP_XXHASH STREQUAL "DOWNLOAD")
message(STATUS "Downloading Xxhash as requested")
set(_download_xxhash TRUE)
else()
find_path(XXHASH_INCLUDE_DIR xxhash.h)
find_library(XXHASH_LIBRARY xxhash)
if(XXHASH_INCLUDE_DIR AND XXHASH_LIBRARY)
file(READ "${XXHASH_INCLUDE_DIR}/xxhash.h" _xxhash_h)
string(REGEX MATCH "#define XXH_VERSION_MAJOR +([0-9]+).*#define XXH_VERSION_MINOR +([0-9]+).*#define XXH_VERSION_RELEASE +([0-9]+)" _ "${_xxhash_h}")
set(_xxhash_version_string "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}.${CMAKE_MATCH_3}")
if(NOT "${CMAKE_MATCH_0}" STREQUAL "" AND "${_xxhash_version_string}" VERSION_GREATER_EQUAL "${Xxhash_FIND_VERSION}")
message(STATUS "Using system Xxhash (${XXHASH_LIBRARY})")
set(_xxhash_origin "SYSTEM (${XXHASH_LIBRARY})")
add_library(dep_xxhash UNKNOWN IMPORTED)
set_target_properties(
dep_xxhash
PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${XXHASH_INCLUDE_DIR}"
IMPORTED_LOCATION "${XXHASH_LIBRARY}"
)
endif()
endif()
if(NOT TARGET dep_xxhash)
if(DEPS STREQUAL "AUTO")
message(STATUS "Downloading Xxhash from the internet since Xxhash>=${Xxhash_FIND_VERSION} was not found locally and DEPS=AUTO")
set(_download_xxhash TRUE)
else()
message(FATAL_ERROR "Could not find Xxhash>=${Xxhash_FIND_VERSION}")
endif()
endif()
endif()
if(_download_xxhash)
set(_xxhash_origin DOWNLOADED)
set(_xxhash_version_string 0.8.3)
include(FetchContent)
FetchContent_Declare(
Xxhash
URL "https://github.com/Cyan4973/xxhash/archive/refs/tags/v${_xxhash_version_string}.tar.gz"
URL_HASH SHA256=aae608dfe8213dfd05d909a57718ef82f30722c392344583d3f39050c7f29a80
)
FetchContent_MakeAvailable(Xxhash)
set(_xxhash_sources "${xxhash_SOURCE_DIR}/xxhash.c")
if(PLATFORM STREQUAL x86_64 OR PLATFORM STREQUAL AMD64)
list(APPEND _xxhash_sources "${xxhash_SOURCE_DIR}/xxh_x86dispatch.c")
endif()
add_library(dep_xxhash STATIC EXCLUDE_FROM_ALL "${_xxhash_sources}")
target_compile_definitions(dep_xxhash INTERFACE XXH_STATIC_LINKING_ONLY)
if(PLATFORM STREQUAL x86_64 OR PLATFORM STREQUAL AMD64)
target_compile_definitions(dep_xxhash INTERFACE USE_XXH_DISPATCH)
endif()
if(WIN32)
target_compile_definitions(dep_xxhash PRIVATE _CRT_SECURE_NO_WARNINGS)
endif()
target_include_directories(
dep_xxhash SYSTEM INTERFACE "$<BUILD_INTERFACE:${xxhash_SOURCE_DIR}>"
)
endif()
if(WIN32)
target_link_libraries(dep_xxhash INTERFACE ws2_32)
endif()
register_dependency(Xxhash "${_xxhash_origin}" "${_xxhash_version_string}")
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