构建 sfml 时 Cmake 未链接

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。我正在使用带有 cmake 的子目录。我的构建很好，但它没有链接 SFML

根-| -lib1 -smfl -lib3 -my_project

我尝试过使用“target_link_directories()”之类的方法，但要么我做错了，要么这绝对不是正确的选择。

根 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 无法链接，因为它找不到对不同 FT_ 符号的引用（FT_MulFix、FT_Init_FreeType 等）

这些是由 FreeType 库定义的。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，是否将sfml-graphics 目标与Free 类型相关联？

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 将我指向无法链接的实际目标的方向。