cmake:前导或尾随空格(策略CMP0004)

我正在关注 this question . 然而,我的 cmake 有错误的面:

-- Configuring done
CMake Error at CMakeLists.txt:18 (add_executable):
  Target "main" links to item "-L/usr/lib/x86_64-linux-gnu -lSDL2 " which has
  leading or trailing whitespace.  This is now an error according to policy
  CMP0004.


-- Generating done

有什么问题吗 cmake公司

我不认为轻视 cmake公司 版本差异会导致这种错误。

# CMakeLists.txt

cmake_minimum_required(VERSION 3.5.1)
project (main)

add_executable(main
    main.cpp
)

find_package(SDL2 REQUIRED)
include_directories(${SDL2_INCLUDE_DIRS})
target_link_libraries(main ${SDL2_LIBRARIES})

// main.cpp

int main()
{
    return 0;
}

更新:

的内容 /usr/lib/x86_64-linux-gnu/cmake/SDL2/sdl2-config.cmake

是

# sdl2 cmake project-config input for ./configure scripts

set(prefix "/usr") 
set(exec_prefix "${prefix}")
set(libdir "${prefix}/lib/x86_64-linux-gnu")
set(SDL2_PREFIX "/usr")
set(SDL2_EXEC_PREFIX "/usr")
set(SDL2_LIBDIR "${prefix}/lib/x86_64-linux-gnu")
set(SDL2_INCLUDE_DIRS "${prefix}/include/SDL2")
set(SDL2_LIBRARIES "-L${SDL2_LIBDIR}  -lSDL2 ")