cmake:vs2015/MinGW静态编译leveldb

leveldb是google的开源项目(https://github.com/google/leveldb), 在linux下编译很方便,然而官方版本却没有提供在windows下的编译方式,好麻烦。还好,开源的世界热心人很多,同样在github上找到了cmake编译版本(https://github.com/bureau14/leveldb),有了cmake版本,windows下编译的问题就解决了一大半,下载这个版本的源码在windows用vs2015编译通过。但执行nmake install后发现,cmake脚本提供的安装功能不完整,只安装了bin文件夹。于是手工修改了CMakeLists.txt,才能完整安装。

修改CMakeLists.txt

修改后的CMakeLists.txt如下(搜索guyadong标记,可以找到所有添加的代码)

cmake_minimum_required(VERSION 3.0.2 FATAL_ERROR)

project(leveldb CXX)    
set(CMAKE_DEBUG_POSTFIX "d")

set(Boost_USE_STATIC_LIBS ON)
set(Boost_USE_MULTITHREAD ON)
set(Boost_USE_STATIC_RUNTIME OFF)

find_package(Boost COMPONENTS 
    date_time
    filesystem
    system
    REQUIRED)

set(SNAPPY_LIBRARY "")

string(REGEX MATCH "clang" CLANG ${CMAKE_CXX_COMPILER})

if(CMAKE_COMPILER_IS_GNUCXX OR CLANG)
    find_library(Pthread_LIBRARY pthread)
    find_library(Realtime_LIBRARY rt)
    # find library can be problematic with stdc++ which is why we hardwire the link
    set(Stdcpp_LIBRARY stdc++)
else(CMAKE_COMPILER_IS_GNUCXX OR CLANG)
    set(Pthread_LIBRARY "")
    set(Realtime_LIBRARY "")
    set(Stdcpp_LIBRARY "")
endif(CMAKE_COMPILER_IS_GNUCXX OR CLANG)

include_directories(${Boost_INCLUDE_DIRS}
    ${CMAKE_CURRENT_SOURCE_DIR}
    include)

if(MSVC)
    add_compile_options(
        /D_CRT_SECURE_NO_WARNINGS
        /wd4389 # signed/unsigned mismatch
        /wd4800 # constructor never returns, potential memory leak because of a singleton pattern
        /wd4722 # unreachable code because of singleton pattern
        /wd4702 # bool cast performance warning
    )
else()
    add_compile_options(
        -Wno-sign-compare
        -std=c++11
    )
endif()

add_definitions(
    -DLEVELDB_ATOMIC_PRESENT
)

set(LEVEL_DB_FILES
    include/leveldb/c.h
    include/leveldb/cache.h
    include/leveldb/comparator.h
    include/leveldb/db.h
    include/leveldb/dumpfile.h
    include/leveldb/env.h
    include/leveldb/iterator.h
    include/leveldb/filter_policy.h
    include/leveldb/iterator.h
    include/leveldb/options.h
    include/leveldb/slice.h
    include/leveldb/status.h
    include/leveldb/table.h
    include/leveldb/table_builder.h
    include/leveldb/write_batch.h
    db/builder.cc
    db/builder.h
    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/skiplist.h
    db/snapshot.h
    db/memtable.cc
    db/memtable.h
    db/repair.cc
    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.cc
    table/block.cc
    table/block.h
    table/block_builder.cc
    table/block_builder.h
    table/filter_block.cc
    table/filter_block.h
    table/format.cc
    table/format.h
    table/iterator.cc
    table/iterator_wrapper.h
    table/merger.cc
    table/merger.h
    table/table.cc
    table/table_builder.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/histogram.cc
    util/histogram.h
    util/logging.cc
    util/logging.h
    util/mutexlock.h
    util/options.cc
    util/random.h
    util/status.cc
    port/port.h)

if(WIN32)
    list(APPEND LEVEL_DB_FILES
        port/port_win.h
        port/port_win.cc
        util/win_logger.h
        util/win_logger.cc
        util/env_boost.cc)
else()
    list(APPEND LEVEL_DB_FILES
        port/port_posix.h
        port/port_posix.cc
        util/posix_logger.h
        util/env_posix.cc)
endif()

add_library(leveldb ${LEVEL_DB_FILES})

target_include_directories(leveldb 
    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include
    PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} 
)

target_link_libraries(leveldb 
    PRIVATE
    ${Boost_LIBRARIES}
    ${Pthread_LIBRARY}
)

add_executable(leveldbutil
    db/leveldb_main.cc)

target_link_libraries(leveldbutil
    leveldb)

set_target_properties(leveldbutil PROPERTIES
    DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})

# we distribute the leveldbutil as it might be useful
install(TARGETS leveldbutil
    RUNTIME DESTINATION bin
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib)
# modified by guyadong
# 将 leveldb 库安装到 lib下
install(TARGETS leveldb
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib)
# 复制 include 文件夹
install(DIRECTORY include DESTINATION .)
# end of modified by guyadong
##################################### TESTS #######################################
# Every leveldb test file has to be compiled as an independant binary
# because of the test framework used by leveldb.
add_library(leveldb_test_rt 
    util/testutil.h
    util/testutil.cc
    util/testharness.h
    util/testharness.cc)

target_include_directories(leveldb_test_rt
    PUBLIC ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/include
)

add_custom_target(RUN_LEVELDB_UNIT_TESTS
    COMMAND ${CMAKE_CTEST_COMMAND}
        --build-config ${CMAKE_CFG_INTDIR}
        --output-log LevelDB_test_${CMAKE_CFG_INTDIR}.log
        --output-on-failure
        --tests-regex leveldb
    COMMENT "Running all LevelDB unit tests"
)

function(LEVELDB_ADD_TEST TESTNAME TESTFILE)
    if(NOT TESTNAME)
        message(SEND_ERROR "Error: LEVELDB_ADD_TEST called without test name")
        return()
    endif(NOT TESTNAME)

    if(NOT TESTFILE)
        message(SEND_ERROR "Error: LEVELDB_ADD_TEST called without test file")
        return()
    endif(NOT TESTFILE)

    add_executable(leveldb_${TESTNAME}_test
        ${TESTFILE})

    target_link_libraries(leveldb_${TESTNAME}_test
        leveldb_test_rt
        leveldb)

    set_target_properties(leveldb_${TESTNAME}_test PROPERTIES
        DEBUG_POSTFIX ${CMAKE_DEBUG_POSTFIX})

    add_test(NAME leveldb_${TESTNAME}_test COMMAND leveldb_${TESTNAME}_test)

    add_dependencies(RUN_LEVELDB_UNIT_TESTS leveldb_${TESTNAME}_test)
    # modified by guyadong
    # 将所有测试程序安装到 bin 下
    install(TARGETS leveldb_${TESTNAME}_test  RUNTIME DESTINATION bin)
    # end of modified by guyadong
endfunction(LEVELDB_ADD_TEST)

LEVELDB_ADD_TEST(env          util/env_test.cc)
LEVELDB_ADD_TEST(crc32        util/crc32c_test.cc)
LEVELDB_ADD_TEST(coding       util/coding_test.cc)
LEVELDB_ADD_TEST(arena        util/arena_test.cc)
LEVELDB_ADD_TEST(cache        util/cache_test.cc)
LEVELDB_ADD_TEST(table        table/table_test.cc)
# IMPORTANT: Commented a test that fails randomly.
# LEVELDB_ADD_TEST(autocompact db/autocompact_test.cc)
LEVELDB_ADD_TEST(corruption   db/corruption_test.cc)
LEVELDB_ADD_TEST(dbformat     db/dbformat_test.cc)
LEVELDB_ADD_TEST(filename     db/filename_test.cc)
LEVELDB_ADD_TEST(log          db/log_test.cc)
LEVELDB_ADD_TEST(skiplist     db/skiplist_test.cc)
LEVELDB_ADD_TEST(version_edit db/version_edit_test.cc)
LEVELDB_ADD_TEST(write_batch  db/write_batch_test.cc)
LEVELDB_ADD_TEST(version_set  db/version_set_test.cc)
LEVELDB_ADD_TEST(filter_block table/filter_block_test.cc)
LEVELDB_ADD_TEST(bloom        util/bloom_test.cc)
LEVELDB_ADD_TEST(hash         util/hash_test.cc)
LEVELDB_ADD_TEST(db_bench     db/db_bench.cc)
LEVELDB_ADD_TEST(db           db/db_test.cc)

可以从这里下载修改后的CMakeLists.txt
https://code.csdn.net/10km/caffe-static/tree/master/patch/leveldb-master/CMakeLists.txt

cmake编译leveldb

修改好CMakeLists.txt后,开始cmake 编译leveldb。下面是脚本编译过程

rem 创建 vs2015 x64编译环境
rem 如果要编译32位版本,则将后面的x86_amd64改为x86
call "%VS140COMNTOOLS%\..\..\VC\vcvarsall.bat" x86_amd64
mkdir build.gcc
cd build.gcc
rem %install_path% 安装路径
rem %boost_root% boost 安装路径
rem 注意这个版本的leveldb需要 boost 支持,编译前请确保有安装boost
rem (我用的boost版本是 1.62) 
rem BOOST_ROOT 用于指定 boost 的安装位置
rem 如果你的boost是默认安装到C:\boost,不指定BOOST_ROOT,cmake也能找到boost的位置
cmake .. -G "NMake Makefiles" -DCMAKE_BUILD_TYPE:STRING=RELEASE ^
    -DBOOST_ROOT=%boost_root% ^
    -DBUILD_SHARED_LIBS=off ^
    -DCMAKE_INSTALL_PREFIX=%install_path%
rem 编译并安装到CMAKE_INSTALL_PREFIX指定的位置
nmake install
cd .. 

解决MinGW编译报错

利用上面的CMakeLists.txt也可以用MinGW编译。
但如果用MinGW编译,会有如下报错:

[  1%] Building CXX object CMakeFiles/leveldb.dir/port/port_win.cc.obj
In file included from P:/MinGW/mingw64/x86_64-w64-mingw32/include/locale.h:12:0,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/clocale:42,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/c++locale.h:41,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/bits/localefwd.h:40,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/string:43,
                 from D:/caffe-static/source/leveldb-master/port/port_win.h:44,
                 from D:\caffe-static\source\leveldb-master\port\port_win.cc:31:
P:/MinGW/mingw64/x86_64-w64-mingw32/include/stdio.h:528:110: error: conflicting declaration of 'int _snprintf(char*, size_t, const char*, ...)' with 'C' linkage
   _CRTIMP int __cdecl _snprintf(char * __restrict__ _Dest,size_t _Count,const char * __restrict__ _Format,...) __MINGW_ATTRIB_DEPRECATED_SEC_WARN;
                                                                                                              ^
In file included from D:\caffe-static\source\leveldb-master\port\port_win.cc:31:0:
D:/caffe-static/source/leveldb-master/port/port_win.h:35:18: note: previous declaration with 'C++' linkage
 #define snprintf _snprintf
                  ^
In file included from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/ext/string_conversions.h:43:0,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/bits/basic_string.h:5247,
                 from P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/string:52,
                 from D:/caffe-static/source/leveldb-master/port/port_win.h:44,
                 from D:\caffe-static\source\leveldb-master\port\port_win.cc:31:
P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/cstdio:175:11: error: '::snprintf' has not been declared
   using ::snprintf;
           ^
P:/MinGW/mingw64/x86_64-w64-mingw32/include/c++/cstdio:185:22: error: '__gnu_cxx::snprintf' has not been declared
   using ::__gnu_cxx::snprintf;
                      ^
CMakeFiles\leveldb.dir\build.make:962: recipe for target 'CMakeFiles/leveldb.dir/port/port_win.cc.obj' failed
make[2]: *** [CMakeFiles/leveldb.dir/port/port_win.cc.obj] Error 1
CMakeFiles\Makefile2:141: recipe for target 'CMakeFiles/leveldb.dir/all' failed
make[1]: *** [CMakeFiles/leveldb.dir/all] Error 2
makefile:128: recipe for target 'all' failed
make: *** [all] Error 2

原因是port/port_win.h中关于snprintf的宏定义#if判断语句有漏洞,只考虑了MSVC编译的情况,却没有考虑MinGW的情况。所以要做如下修改

// 原来的判断只考虑了MSVC,当用MinGW编译时 _MSC_VER < 1900条件也成立,所以就出错了,
// 所以这里多加一个条件限制 defined(_MSC_VER),MinGW编译时就不会进入这个分支
//#if _MSC_VER < 1900
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif

解决了这个问题,再make,编译是通过了,但连接时会报错:

libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x46b): undefined reference to `std::basic_filebuf >::_close()'
libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x64b): undefined reference to `std::basic_filebuf >::_close()'
libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x2a46): undefined reference to `std::basic_filebuf >::_close()'
libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x2be9): undefined reference to `std::basic_filebuf >::_close()'
libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x3235): undefined reference to `std::basic_filebuf >::_close()'
libleveldb.a(env_boost.cc.obj):env_boost.cc:(.text+0x3b19): more undefined references to `std::basic_filebuf >::_close()' follow

其实问题还是出在port/port_win.h,就在我们刚才修改的那段代码下面有一行

#define close _close

就是它造成的。注释掉这一行代码,即可,并且注释掉这一行代码在MSVC(VS2013,VS2015)也都不会报错

可以从这里下载修改后的port_win.h
https://code.csdn.net/10km/caffe-static/tree/master/patch/leveldb-master/port/port_win.h

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