如何在cmake中的源文件之后设置库标志? [英] How to set library flags after source file in cmake?

问题描述

我正在尝试使用带有CMake的hwloc编译项目.但是，链接时会出现大量未定义的参考错误:

I'm trying to compile a project using hwloc with CMake. However, I get a ton of undefined reference errors when linking:

undefined reference to `hwloc_get_type_depth'
undefined reference to `hwloc_bitmap_zero'
[...]

根据此回答一个类似的问题，标志的顺序很重要.

According to this answer to a similar question the order of flags is important.

那么，如何在CMake中生成这样的命令?:

So, how can I generate a command like this in CMake? :

g ++ -Wall -std = c ++ 11 source.cpp -lhwloc

g++ -Wall -std=c++11 source.cpp-lhwloc

从我的CMakeLists.txt中摘录:

Excerpt from my CMakeLists.txt:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11 -lhwloc")

set(SOURCE_FILES source.cpp)
add_executable(source ${SOURCE_FILES})

任何帮助将不胜感激！

我的问题被建议作为

My question was proposed as a possible duplicate of this one, however the flag I wanted to add was to link against a library and not a normal compile flag as seems to be the case in the above mentioned question. @Edgar Rokyan provided the right answer for my problem.

推荐答案

如果您需要链接到 hwloc 库，则可以使用

If you need to link against hwloc library you might use target_link_libraries command:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -std=c++11") # <== remove *-lhwloc*

set(SOURCE_FILES source.cpp)
add_executable(source ${SOURCE_FILES})

target_link_libraries(source hwloc) # <== add this line

这篇关于如何在cmake中的源文件之后设置库标志?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！