early-access version 2853

externals/vcpkg/ports/cityhash/CMakeLists.txt

@@ -0,0 +1,62 @@
+cmake_minimum_required(VERSION 3.13)
+project(cityhash CXX)
+
+option(ENABLE_SSE "Build CityHash variants that depend on the _mm_crc32_u64 intrinsic." OFF)
+
+set(CMAKE_CXX_STANDARD 11)
+
+if (ENABLE_SSE)
+    include (CMakePushCheckState)
+    cmake_push_check_state()
+    if (MSVC)
+        include(CheckCXXSourceCompiles)
+        
+    check_cxx_source_compiles(
+    "#include <nmmintrin.h>
+    int main() {
+        _mm_crc32_u64(0, 0);
+        return 0;
+    }"
+    USE_SSE)
+    else()
+        include(CheckCXXCompilerFlag)
+        check_cxx_compiler_flag ("-msse4.2" USE_SSE)
+        if (USE_SSE)
+            set (SSE2_FLAG "-msse4.2")
+        endif()
+    endif()
+    
+    cmake_pop_check_state()
+    
+    if (NOT USE_SSE)
+        message(FATAL_ERROR "This platform doesn't support feature SSE4.2")
+    endif()
+else()
+    set(USE_SSE OFF)
+endif()
+
+add_library(cityhash STATIC src/city.cc)
+
+list(APPEND CITY_HEADERS src/city.h)
+if (USE_SSE)
+    list(APPEND CITY_HEADERS src/citycrc.h)
+
+    target_compile_options(cityhash PRIVATE ${SSE2_FLAG})
+    if (MSVC)
+        target_compile_definitions(cityhash PRIVATE __SSE4_2__)
+    endif()
+endif()
+
+target_include_directories(cityhash PUBLIC
+	$<INSTALL_INTERFACE:include>
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+)
+
+install(TARGETS cityhash EXPORT cityhash-config 
+    RUNTIME DESTINATION bin
+    ARCHIVE DESTINATION lib
+    LIBRARY DESTINATION lib
+)
+
+install(EXPORT cityhash-config DESTINATION share/cmake/cityhash)
+install(FILES ${CITY_HEADERS} DESTINATION include)