【发布时间】：2019-09-04 12:00:35
【问题描述】：
我正在尝试将大型 cmake 项目与最新的 boost 1.70（不使用 cmake 包）静态链接，但是我得到了一个未定义的 zlib 引用。这适用于动态链接，但我特别需要静态链接。
我尝试移动我的 boost 组件的顺序，特别是添加 zlib 作为目标库和一些我在网上阅读的配置选项，但没有乐趣！
CMAKE 文件
cmake_minimum_required(VERSION 3.10)
project(dummy)
# =========================== Make Flag Setup ============================
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_FLAGS "-static -Wall -Wno-deprecated-declarations -fPIC ")
set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g")
set(CMAKE_CXX_FLAGS_RELEASE "-O3 -fpermissive")
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
# ========================== Third Party Deps ============================
set(Boost_NO_BOOST_CMAKE ON)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME ON)
set(Boost_USE_STATIC_LIBS ON)
find_package(Boost 1.70.0 REQUIRED COMPONENTS locale exception serialization system timer regex
thread program_options chrono filesystem iostreams)
include_directories(${Boost_INCLUDE_DIRS} SYSTEM)
include_directories(.)
include_directories(src)
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/proto)
# ============================== Build Exe ==============================
file(GLOB_RECURSE all_src src/**.cpp)
add_executable(dummy ${all_src})
target_link_libraries(dummy ${Boost_LIBRARIES} pthread maxminddb crypto ssl pthread xerces-c cdb aerospike proto z)
ld 错误
usr/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::after(char const*&, char*&, bool)':
zlib.cpp:(.text+0x108): undefined reference to `crc32'
/usr/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::reset(bool, bool)':
zlib.cpp:(.text+0x181): undefined reference to `deflateReset'
zlib.cpp:(.text+0x196): undefined reference to `inflateEnd'
zlib.cpp:(.text+0x1a9): undefined reference to `inflateReset'
zlib.cpp:(.text+0x1c1): undefined reference to `deflateEnd'
/usr/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::do_init(boost::iostreams::zlib_params const&, bool, void* (*)(void*, unsigned int, unsigned int), void (*)(void*, void*), void*)':
zlib.cpp:(.text+0x3c4): undefined reference to `inflateInit2_'
zlib.cpp:(.text+0x412): undefined reference to `deflateInit2_'
/usr/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::xdeflate(int)':
zlib.cpp:(.text+0x154): undefined reference to `deflate'
/usr/lib/libboost_iostreams.a(zlib.o): In function `boost::iostreams::detail::zlib_base::xinflate(int)':
zlib.cpp:(.text+0x164): undefined reference to `inflate'
collect2: error: ld returned 1 exit status
更新 1
与我尝试使用 findzlib.cmake 包的评论建议一样，我什至下载并编译了最新版本的 zlib (1.2.11)，因为也许这可能与我拥有的 boost 版本 (1.70) 一起工作得更好
find_package(ZLIB REQUIRED)
message(ZLIB_INCLUDE - [${ZLIB_INCLUDE_DIRS}])
message(ZLIB_FOUND - [${ZLIB_FOUND}])
message(ZLIB_LIBRARIES - [${ZLIB_LIBRARIES}])
...
target_link_libraries(dummy ${Boost_LIBRARIES} pthread maxminddb crypto ssl pthread xerces-c cdb aerospike proto ${ZLIB_LIBRARIES})
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11")
ZLIB_INCLUDE - [/usr/include]
ZLIB_FOUND - [TRUE]
ZLIB_LIBRARIES - [/usr/lib/x86_64-linux-gnu/libz.so]
我仍然得到相同的链接器错误，它找到的库是一个共享对象，并且 cmake 包似乎没有静态库选项的选项。
【问题讨论】：
-
CMake 附带了一个
FindZLib.cmake。你可能想把它添加到你的依赖链中。 -
添加了一个更新来涵盖 FindZib 的建议，仍然没有乐趣:(