构建 sfml 时 Cmake 不链接

Question

我有我的项目，嵌套在另一个目录中，其中包含我的项目所需的库。我正在使用与 Clion 3.14 捆绑在一起的 cmake。我在 cmake 中使用子目录。我构建得很好，但它没有链接 SFML

根-| -lib1 -smfl -lib3 -my_project

我试过使用 'target_link_directories()' 之类的东西，但要么我做错了，要么绝对不是正确的选择。

根目录CMakeList.txt

cmake_minimum_required(VERSION 3.10)

include_directories("ChaiScript/include" Catch2/include freetype2/include SFML/include )

add_subdirectory(Catch2)
add_subdirectory(ChaiScript)
add_subdirectory(freetype2)
add_subdirectory(SFML)


add_subdirectory(Purrmaid)

./Purrmaid/CMakeList.txt


cmake_minimum_required (VERSION 3.10)
set(CMAKE_CXX_STANDARD 17)
project (purrmaid)



add_executable( purrmaid
        main.cpp
        Base_Object.cpp
        ...
        ThreadManager.cpp)

target_link_libraries(purrmaid sfml-system sfml-window sfml-graphics sfml-network sfml-audio pthread dl)

../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_MulFix'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Init_FreeType'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Get_Char_Index'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Get_Kerning'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Get_Glyph'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_New_Face'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Stroker_Set'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Glyph_To_Bitmap'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Outline_Embolden'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Load_Char'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Done_Glyph'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Stroker_New'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Open_Face'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Glyph_Stroke'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Bitmap_Embolden'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Done_Face'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_New_Memory_Face'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Stroker_Done'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Done_FreeType'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Set_Pixel_Sizes'
../SFML/lib/libsfml-graphics-d.so.2.5.1: undefined reference to `FT_Select_Charmap'

Answer 1

显示的错误是 SFML 无法 link，因为它找不到对不同 FT_ 符号（FT_MulFix、FT_Init_FreeType 等）的引用

这些由 FreeType 库定义。我假设您在 add_subdirectory(SFML)

时正在构建不同的 SFML 目标

在SFML子目录下的CMakeLists.txt文件中，你link针对自由类型的sfml-graphics目标吗？

add_library(sfml-graphics
            ...)

# This is assuming you have a "freetype2" target available
# please replace by the actual name of the freetype target
target_link_libraries(sfml-graphics freetype2 ...)

编辑：感谢 Tsyvarev 为我指明了无法 link 的实际目标方向.

构建 sfml 时 Cmake 不链接

Cmake not linking when building sfml

c++

cmake

sfml