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# Copyright 2017 The LevelDB Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file. See the AUTHORS file for names of contributors.
cmake_minimum_required(VERSION 3.9)
# Keep the version below in sync with the one in db.h
project(leveldb VERSION 1.23.0 LANGUAGES C CXX)
# C standard can be overridden when this is used as a sub-project.
if(NOT CMAKE_C_STANDARD)
# This project can use C11, but will gracefully decay down to C89.
set(CMAKE_C_STANDARD 11)
set(CMAKE_C_STANDARD_REQUIRED OFF)
set(CMAKE_C_EXTENSIONS OFF)
endif(NOT CMAKE_C_STANDARD)
# C++ standard can be overridden when this is used as a sub-project.
if(NOT CMAKE_CXX_STANDARD)
# This project requires C++11.
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
endif(NOT CMAKE_CXX_STANDARD)
if (WIN32)
set(LEVELDB_PLATFORM_NAME LEVELDB_PLATFORM_WINDOWS)
# TODO(cmumford): Make UNICODE configurable for Windows.
add_definitions(-D_UNICODE -DUNICODE)
else (WIN32)
set(LEVELDB_PLATFORM_NAME LEVELDB_PLATFORM_POSIX)
endif (WIN32)
option(LEVELDB_BUILD_TESTS "Build LevelDB's unit tests" ON)
option(LEVELDB_BUILD_BENCHMARKS "Build LevelDB's benchmarks" ON)
option(LEVELDB_INSTALL "Install LevelDB's header and library" ON)
include(CheckIncludeFile)
check_include_file("unistd.h" HAVE_UNISTD_H)
include(CheckLibraryExists)
check_library_exists(crc32c crc32c_value "" HAVE_CRC32C)
check_library_exists(snappy snappy_compress "" HAVE_SNAPPY)
check_library_exists(tcmalloc malloc "" HAVE_TCMALLOC)
include(CheckCXXSymbolExists)
# Using check_cxx_symbol_exists() instead of check_c_symbol_exists() because
# we're including the header from C++, and feature detection should use the same
# compiler language that the project will use later. Principles aside, some
# versions of do not expose fdatasync() in <unistd.h> in standard C mode
# (-std=c11), but do expose the function in standard C++ mode (-std=c++11).
check_cxx_symbol_exists(fdatasync "unistd.h" HAVE_FDATASYNC)
check_cxx_symbol_exists(F_FULLFSYNC "fcntl.h" HAVE_FULLFSYNC)
check_cxx_symbol_exists(O_CLOEXEC "fcntl.h" HAVE_O_CLOEXEC)
if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Disable C++ exceptions.
string(REGEX REPLACE "/EH[a-z]+" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHs-c-")
add_definitions(-D_HAS_EXCEPTIONS=0)
# Disable RTTI.
string(REGEX REPLACE "/GR" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /GR-")
else(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Enable strict prototype warnings for C code in clang and gcc.
if(NOT CMAKE_C_FLAGS MATCHES "-Wstrict-prototypes")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wstrict-prototypes")
endif(NOT CMAKE_C_FLAGS MATCHES "-Wstrict-prototypes")
# Disable C++ exceptions.
string(REGEX REPLACE "-fexceptions" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
# Disable RTTI.
string(REGEX REPLACE "-frtti" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
endif(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
# Test whether -Wthread-safety is available. See
# https://clang.llvm.org/docs/ThreadSafetyAnalysis.html
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag(-Wthread-safety HAVE_CLANG_THREAD_SAFETY)
# Used by googletest.
check_cxx_compiler_flag(-Wno-missing-field-initializers
LEVELDB_HAVE_NO_MISSING_FIELD_INITIALIZERS)
include(CheckCXXSourceCompiles)
# Test whether C++17 __has_include is available.
check_cxx_source_compiles("
#if defined(__has_include) && __has_include(<string>)
#include <string>
#endif
int main() { std::string str; return 0; }
" HAVE_CXX17_HAS_INCLUDE)
set(LEVELDB_PUBLIC_INCLUDE_DIR "include/leveldb")
set(LEVELDB_PORT_CONFIG_DIR "include/port")
configure_file(
"port/port_config.h.in"
"${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
)
include_directories(
"${PROJECT_BINARY_DIR}/include"
"."
)
if(BUILD_SHARED_LIBS)
# Only export LEVELDB_EXPORT symbols from the shared library.
add_compile_options(-fvisibility=hidden)
endif(BUILD_SHARED_LIBS)
# Must be included before CMAKE_INSTALL_INCLUDEDIR is used.
include(GNUInstallDirs)
add_library(leveldb "")
target_sources(leveldb
PRIVATE
"${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
"db/builder.cc"
"db/builder.h"
"db/c.cc"
"db/db_impl.cc"
"db/db_impl.h"
"db/db_iter.cc"
"db/db_iter.h"
"db/dbformat.cc"
"db/dbformat.h"
"db/dumpfile.cc"
"db/filename.cc"
"db/filename.h"
"db/log_format.h"
"db/log_reader.cc"
"db/log_reader.h"
"db/log_writer.cc"
"db/log_writer.h"
"db/memtable.cc"
"db/memtable.h"
"db/repair.cc"
"db/skiplist.h"
"db/snapshot.h"
"db/table_cache.cc"
"db/table_cache.h"
"db/version_edit.cc"
"db/version_edit.h"
"db/version_set.cc"
"db/version_set.h"
"db/write_batch_internal.h"
"db/write_batch.cc"
"port/port_stdcxx.h"
"port/port.h"
"port/thread_annotations.h"
"table/block_builder.cc"
"table/block_builder.h"
"table/block.cc"
"table/block.h"
"table/filter_block.cc"
"table/filter_block.h"
"table/format.cc"
"table/format.h"
"table/iterator_wrapper.h"
"table/iterator.cc"
"table/merger.cc"
"table/merger.h"
"table/table_builder.cc"
"table/table.cc"
"table/two_level_iterator.cc"
"table/two_level_iterator.h"
"util/arena.cc"
"util/arena.h"
"util/bloom.cc"
"util/cache.cc"
"util/coding.cc"
"util/coding.h"
"util/comparator.cc"
"util/crc32c.cc"
"util/crc32c.h"
"util/env.cc"
"util/filter_policy.cc"
"util/hash.cc"
"util/hash.h"
"util/logging.cc"
"util/logging.h"
"util/mutexlock.h"
"util/no_destructor.h"
"util/options.cc"
"util/random.h"
"util/status.cc"
# Only CMake 3.3+ supports PUBLIC sources in targets exported by "install".
$<$<VERSION_GREATER:CMAKE_VERSION,3.2>:PUBLIC>
"${LEVELDB_PUBLIC_INCLUDE_DIR}/c.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/cache.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/comparator.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/db.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/dumpfile.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/env.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/export.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/filter_policy.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/iterator.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/options.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/slice.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/status.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/table_builder.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/table.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/write_batch.h"
)
if (WIN32)
target_sources(leveldb
PRIVATE
"util/env_windows.cc"
"util/windows_logger.h"
)
else (WIN32)
target_sources(leveldb
PRIVATE
"util/env_posix.cc"
"util/posix_logger.h"
)
endif (WIN32)
# MemEnv is not part of the interface and could be pulled to a separate library.
target_sources(leveldb
PRIVATE
"helpers/memenv/memenv.cc"
"helpers/memenv/memenv.h"
)
target_include_directories(leveldb
PUBLIC
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
)
set_target_properties(leveldb
PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION ${PROJECT_VERSION_MAJOR})
target_compile_definitions(leveldb
PRIVATE
# Used by include/export.h when building shared libraries.
LEVELDB_COMPILE_LIBRARY
# Used by port/port.h.
${LEVELDB_PLATFORM_NAME}=1
)
if (NOT HAVE_CXX17_HAS_INCLUDE)
target_compile_definitions(leveldb
PRIVATE
LEVELDB_HAS_PORT_CONFIG_H=1
)
endif(NOT HAVE_CXX17_HAS_INCLUDE)
if(BUILD_SHARED_LIBS)
target_compile_definitions(leveldb
PUBLIC
# Used by include/export.h.
LEVELDB_SHARED_LIBRARY
)
endif(BUILD_SHARED_LIBS)
if(HAVE_CLANG_THREAD_SAFETY)
target_compile_options(leveldb
PUBLIC
-Werror -Wthread-safety)
endif(HAVE_CLANG_THREAD_SAFETY)
if(HAVE_CRC32C)
target_link_libraries(leveldb crc32c)
endif(HAVE_CRC32C)
if(HAVE_SNAPPY)
target_link_libraries(leveldb snappy)
endif(HAVE_SNAPPY)
if(HAVE_TCMALLOC)
target_link_libraries(leveldb tcmalloc)
endif(HAVE_TCMALLOC)
# Needed by port_stdcxx.h
find_package(Threads REQUIRED)
target_link_libraries(leveldb Threads::Threads)
add_executable(leveldbutil
"db/leveldbutil.cc"
)
target_link_libraries(leveldbutil leveldb)
if(LEVELDB_BUILD_TESTS)
enable_testing()
# Prevent overriding the parent project's compiler/linker settings on Windows.
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
set(install_gtest OFF)
set(install_gmock OFF)
set(build_gmock ON)
# This project is tested using GoogleTest.
add_subdirectory("third_party/googletest")
# GoogleTest triggers a missing field initializers warning.
if(LEVELDB_HAVE_NO_MISSING_FIELD_INITIALIZERS)
set_property(TARGET gtest
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
set_property(TARGET gmock
APPEND PROPERTY COMPILE_OPTIONS -Wno-missing-field-initializers)
endif(LEVELDB_HAVE_NO_MISSING_FIELD_INITIALIZERS)
function(leveldb_test test_file)
get_filename_component(test_target_name "${test_file}" NAME_WE)
add_executable("${test_target_name}" "")
target_sources("${test_target_name}"
PRIVATE
"${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
"util/testutil.cc"
"util/testutil.h"
"${test_file}"
)
target_link_libraries("${test_target_name}" leveldb gmock gtest)
target_compile_definitions("${test_target_name}"
PRIVATE
${LEVELDB_PLATFORM_NAME}=1
)
if (NOT HAVE_CXX17_HAS_INCLUDE)
target_compile_definitions("${test_target_name}"
PRIVATE
LEVELDB_HAS_PORT_CONFIG_H=1
)
endif(NOT HAVE_CXX17_HAS_INCLUDE)
add_test(NAME "${test_target_name}" COMMAND "${test_target_name}")
endfunction(leveldb_test)
leveldb_test("db/c_test.c")
leveldb_test("db/fault_injection_test.cc")
leveldb_test("issues/issue178_test.cc")
leveldb_test("issues/issue200_test.cc")
leveldb_test("issues/issue320_test.cc")
leveldb_test("util/env_test.cc")
leveldb_test("util/status_test.cc")
leveldb_test("util/no_destructor_test.cc")
if(NOT BUILD_SHARED_LIBS)
leveldb_test("db/autocompact_test.cc")
leveldb_test("db/corruption_test.cc")
leveldb_test("db/db_test.cc")
leveldb_test("db/dbformat_test.cc")
leveldb_test("db/filename_test.cc")
leveldb_test("db/log_test.cc")
leveldb_test("db/recovery_test.cc")
leveldb_test("db/skiplist_test.cc")
leveldb_test("db/version_edit_test.cc")
leveldb_test("db/version_set_test.cc")
leveldb_test("db/write_batch_test.cc")
leveldb_test("helpers/memenv/memenv_test.cc")
leveldb_test("table/filter_block_test.cc")
leveldb_test("table/table_test.cc")
leveldb_test("util/arena_test.cc")
leveldb_test("util/bloom_test.cc")
leveldb_test("util/cache_test.cc")
leveldb_test("util/coding_test.cc")
leveldb_test("util/crc32c_test.cc")
leveldb_test("util/hash_test.cc")
leveldb_test("util/logging_test.cc")
# TODO(costan): This test also uses
# "util/env_{posix|windows}_test_helper.h"
if (WIN32)
leveldb_test("util/env_windows_test.cc")
else (WIN32)
leveldb_test("util/env_posix_test.cc")
endif (WIN32)
endif(NOT BUILD_SHARED_LIBS)
endif(LEVELDB_BUILD_TESTS)
if(LEVELDB_BUILD_BENCHMARKS)
# This project uses Google benchmark for benchmarking.
set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "" FORCE)
add_subdirectory("third_party/benchmark")
function(leveldb_benchmark bench_file)
get_filename_component(bench_target_name "${bench_file}" NAME_WE)
add_executable("${bench_target_name}" "")
target_sources("${bench_target_name}"
PRIVATE
"${PROJECT_BINARY_DIR}/${LEVELDB_PORT_CONFIG_DIR}/port_config.h"
"util/histogram.cc"
"util/histogram.h"
"util/testutil.cc"
"util/testutil.h"
"${bench_file}"
)
target_link_libraries("${bench_target_name}" leveldb gmock gtest benchmark)
target_compile_definitions("${bench_target_name}"
PRIVATE
${LEVELDB_PLATFORM_NAME}=1
)
if (NOT HAVE_CXX17_HAS_INCLUDE)
target_compile_definitions("${bench_target_name}"
PRIVATE
LEVELDB_HAS_PORT_CONFIG_H=1
)
endif(NOT HAVE_CXX17_HAS_INCLUDE)
endfunction(leveldb_benchmark)
if(NOT BUILD_SHARED_LIBS)
leveldb_benchmark("benchmarks/db_bench.cc")
endif(NOT BUILD_SHARED_LIBS)
check_library_exists(sqlite3 sqlite3_open "" HAVE_SQLITE3)
if(HAVE_SQLITE3)
leveldb_benchmark("benchmarks/db_bench_sqlite3.cc")
target_link_libraries(db_bench_sqlite3 sqlite3)
endif(HAVE_SQLITE3)
# check_library_exists is insufficient here because the library names have
# different manglings when compiled with clang or gcc, at least when installed
# with Homebrew on Mac.
set(OLD_CMAKE_REQURED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
list(APPEND CMAKE_REQUIRED_LIBRARIES kyotocabinet)
check_cxx_source_compiles("
#include <kcpolydb.h>
int main() {
kyotocabinet::TreeDB* db = new kyotocabinet::TreeDB();
delete db;
return 0;
}
" HAVE_KYOTOCABINET)
set(CMAKE_REQUIRED_LIBRARIES ${OLD_CMAKE_REQURED_LIBRARIES})
if(HAVE_KYOTOCABINET)
leveldb_benchmark("benchmarks/db_bench_tree_db.cc")
target_link_libraries(db_bench_tree_db kyotocabinet)
endif(HAVE_KYOTOCABINET)
endif(LEVELDB_BUILD_BENCHMARKS)
if(LEVELDB_INSTALL)
install(TARGETS leveldb
EXPORT leveldbTargets
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
)
install(
FILES
"${LEVELDB_PUBLIC_INCLUDE_DIR}/c.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/cache.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/comparator.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/db.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/dumpfile.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/env.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/export.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/filter_policy.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/iterator.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/options.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/slice.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/status.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/table_builder.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/table.h"
"${LEVELDB_PUBLIC_INCLUDE_DIR}/write_batch.h"
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/leveldb"
)
include(CMakePackageConfigHelpers)
configure_package_config_file(
"cmake/${PROJECT_NAME}Config.cmake.in"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
write_basic_package_version_file(
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
COMPATIBILITY SameMajorVersion
)
install(
EXPORT leveldbTargets
NAMESPACE leveldb::
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
install(
FILES
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}Config.cmake"
"${PROJECT_BINARY_DIR}/cmake/${PROJECT_NAME}ConfigVersion.cmake"
DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
)
endif(LEVELDB_INSTALL)