MinGW/CMake对ZLib的未定义引用 [英] MinGW/CMake Undefined Reference to ZLib

问题描述

我有一个项目要使用CMake构建并用MinGW进行编译.该项目使用Zlib.当我使用CMake编译时，没有任何错误，但是当我运行MinGW Make时，它给出以下输出:

I have a project I want to build with CMake and compile with MinGW. The project uses Zlib. When I build with CMake I get no errors but then when I run MinGW Make it gives the following output:

C:\Projects\MultiMCBuild>C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe
.
.
.
[ 50%] Linking CXX shared library ..\libMultiMC_logic.dll
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x1f6c): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x29e2): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2a6d): undefined reference to 'z_get_crc_table'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2ca7): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2f52): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x2f77): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3239): undefined reference to 'z_inflateInit2_'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3317): undefined reference to 'z_inflateEnd'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3626): undefined reference to 'z_crc32'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x371f): undefined reference to 'z_inflate'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x376a): undefined reference to 'z_crc32'
C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):unzip.c:(.text+0x3a57): undefined reference to 'z_inflateEnd'
C:/Qt/Tools/mingw492_32/bin/../lib/gcc/i686-w64-    mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: C:/Projects/MultiMCBuild/External/Install/QuaZIP/lib/libquazip.a(unzip.c.obj):     bad reloc address 0x20 in section `.eh_frame'
collect2.exe: error: ld returned 1 exit status
logic\CMakeFiles\MultiMC_logic.dir\build.make:3186: recipe for target 'libMultiMC_logic.dll' failed
mingw32-make[2]: * * * [libMultiMC_logic.dll] Error 1
CMakeFiles\Makefile2:1806: recipe for target 'logic/CMakeFiles/MultiMC_logic.dir/all' failed
mingw32-make[1]: * * * [logic/CMakeFiles/MultiMC_logic.dir/all] Error 2
makefile:159: recipe for target 'all' failed
mingw32-make: * * * [all] Error 2

任何人都知道如何解决此问题?我读到代码找不到ZLib库，该如何链接它?

Anyone have a clue what I can do to fix this? I read that the code can't find the ZLib library, how do I link it?

编辑 此处是我的CMakeLists.txt.我是从Git项目获得的.

EDIT here is my CMakeLists.txt. I got this from the Git project.

推荐答案

我只是尝试生成一个小示例来重现您的错误.我从zlib主页上获取了测试文件 http://zlib.net/zpipe.c

I just tried to generate a small example to reproduce your errors. I took my test file from the home page of zlib http://zlib.net/zpipe.c

我的初始CMakeLists.txt是

cmake_minimum_required(VERSION 3.4)
project(zlib_test)
set(ZLIB_TEST_SOURCES zpipe.c)
add_executable(${PROJECT_NAME} ${ZLIB_TEST_SOURCES})

我也遇到了相同的错误

[ 50%] Building C object CMakeFiles/zlib_test.dir/zpipe.c.o
[100%] Linking C executable zlib_test
CMakeFiles/zlib_test.dir/zpipe.c.o: In function `def':
zpipe.c:(.text+0x65): undefined reference to `deflateInit_'
zpipe.c:(.text+0xcd): undefined reference to `deflateEnd'
zpipe.c:(.text+0x135): undefined reference to `deflate'
zpipe.c:(.text+0x1cf): undefined reference to `deflateEnd'
zpipe.c:(.text+0x25d): undefined reference to `deflateEnd'
CMakeFiles/zlib_test.dir/zpipe.c.o: In function `inf':
zpipe.c:(.text+0x2eb): undefined reference to `inflateInit_'
zpipe.c:(.text+0x353): undefined reference to `inflateEnd'
zpipe.c:(.text+0x3a4): undefined reference to `inflate'
zpipe.c:(.text+0x404): undefined reference to `inflateEnd'
zpipe.c:(.text+0x476): undefined reference to `inflateEnd'
zpipe.c:(.text+0x4a6): undefined reference to `inflateEnd'
collect2: error: ld returned 1 exit status
make[2]: *** [zlib_test] Error 1
make[1]: *** [CMakeFiles/zlib_test.dir/all] Error 2
make: *** [all] Error 2

将CMakeLists.txt更改为此格式后

cmake_minimum_required(VERSION 3.4)
project(zlib_test)

find_package(ZLIB REQUIRED)
if (ZLIB_FOUND)
    include_directories(${ZLIB_INCLUDE_DIRS})
endif()

set(ZLIB_TEST_SOURCES zpipe.c)

add_executable(${PROJECT_NAME} ${ZLIB_TEST_SOURCES})
target_link_libraries(${PROJECT_NAME} ${ZLIB_LIBRARIES})

我可以编译程序.

因此，您的问题是:CMakeLists.txt中的ZLIB添加在哪里?至少，您需要行find_package(ZLIB REQUIRED).

So your problem is: Where is ZLIB added in your CMakeLists.txt? At least, you need the line find_package(ZLIB REQUIRED).

这篇关于MinGW/CMake对ZLib的未定义引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！