c - 在 CLion CMakeLists.xt 中链接 GSL 时 target_link_libraries 出错

Question

我正在尝试在依赖于外部 C 库 GSL 的 CLion 中使用 C++ 代码。

我创建了一个 CMakeLists.txt 文件：

cmake_minimum_required(VERSION 3.20)
project(untitled)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED YES)
set(CMAKE_CXX_COMPILER /usr/local/Cellar/gcc/11.1.0_1/bin/g++-11)
set(CMAKE_CXX_FLAGS " -std=c++17 -mpopcnt -L/usr/local/lib")

include_directories(${PROJECT_BINARY_DIR}/Include /usr/local/include)

add_executable(untitled main.cpp)
find_package(GSL REQUIRED)
include_directories(${GSL_INCLUDE_DIR})
target_link_libraries(untitled main.cpp GSL::gsl)

但是当我编译它时，我得到了以下错误：

[ 50%] Linking CXX executable untitled
ld: library not found for -lmain.cpp
collect2: error: ld returned 1 exit status
make[3]: *** [untitled] Error 1
make[2]: *** [CMakeFiles/untitled.dir/all] Error 2
make[1]: *** [CMakeFiles/untitled.dir/rule] Error 2
make: *** [untitled] Error 2

关于可能导致这种情况的任何建议？

Answer 1

我在 CMakeLists.txt 中的代码中的问题很简单，我只是没看到。

事实上，必须删除 target_link_libraries 中的 'main.cpp' 声明。

cmake_minimum_required(VERSION 3.20)
project(untitled)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED YES)

add_executable(untitled main.cpp)
find_package(GSL REQUIRED)
include_directories(${GSL_INCLUDE_DIR})
target_link_libraries(untitled GSL::gsl)

该代码有效。

result: 5.05537 0.401813 0.150471
error : 0.0553737 0.00181308 0.000470529

Process finished with exit code 0