Undefined references building in Arch Linux

Hello, I am having the following problem trying to make this application (I'm using Manjaro/Arch Linux)

After executing `cmake .` I got:  



-- Found SFML 2.5.1 in /usr/lib64/cmake/SFML  

-- Google Mock was not found - tests based on that will not build  

-- spirv-tools not linked - illegal SPIRV may be generated for HLSL  

-- Configuring done

-- Generating done

-- Build files have been written to: /home/cmoralesmx/git/SHADERed



Then, `make` works as expected until it reaches main.cpp.o 

An abreviated copy and paste of the log follows



[100%] Linking CXX executable bin/SHADERed  

/usr/bin/ld: CMakeFiles/SHADERed.dir/main.cpp.o: in function `setIcon(SDL_Window*)':  

main.cpp:(.text+0x185): undefined reference to `SDL_CreateRGBSurfaceWithFormatFrom'  

/usr/bin/ld: main.cpp:(.text+0x26c): undefined reference to `SDL_SetWindowIcon'  

/usr/bin/ld: main.cpp:(.text+0x278): undefined reference to `SDL_FreeSurface'  

/usr/bin/ld: CMakeFiles/SHADERed.dir/main.cpp.o: in function `main':  

main.cpp:(.text+0x738): undefined reference to `SDL_Init'  



A larger version of the log is available in [this pastebin](https://pastebin.com/BLmjyM8S)



Any help would be greatly appreciated. Thanks

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