user/supertux: FTBFS: missing required library
...
[ 4%] Performing configure step for 'SDL_ttf'
CMake Deprecation Warning at CMakeLists.txt:4 (cmake_minimum_required):
Compatibility with CMake < 2.8.12 will be removed from a future version of
CMake.
Update the VERSION argument <min> value or use a ...<max> suffix to tell
CMake that the project does not need compatibility with older versions.
[ 4%] Performing configure step for 'tinygettext'
[ 4%] Built target supertux2_c
-- The C compiler identification is GNU 8.5.0
-- The C compiler identification is GNU 8.5.0
-- The C compiler identification is GNU 8.5.0
-- Detecting C compiler ABI info
-- The CXX compiler identification is GNU 8.5.0
-- The CXX compiler identification is GNU 8.5.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info
[ 4%] Linking C static library libsavepng.a
-- Detecting C compiler ABI info - done
[ 4%] Built target savepng
-- Check for working C compiler: /usr/local/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Found Freetype: /usr/lib/libfreetype.so (found version "2.10.4")
-- Link-time dependencies:
-- SDL_LIBRARY-NOTFOUND
-- /usr/lib/libfreetype.so
-- Configuring done
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
SDL_LIBRARY
linked by target "SDL2_ttf" in directory /root/packages/user/supertux/src/SuperTux-v0.6.2-Source/external/SDL_ttf
-- Generating done
CMake Warning:
Manually-specified variables were not used by the project:
RAQM_INCLUDE_DIR
RAQM_LIBRARIES
CMake Generate step failed. Build files cannot be regenerated correctly.
make[2]: *** [CMakeFiles/SDL_ttf.dir/build.make:92: SDL_ttf-prefix/src/SDL_ttf-stamp/SDL_ttf-configure] Error 1
make[1]: *** [CMakeFiles/Makefile2:176: CMakeFiles/SDL_ttf.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
-- Detecting C compiler ABI info - done
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/local/bin/gcc - skipped
-- Detecting C compile features
-- Check for working C compiler: /usr/local/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
...