I am trying to compile an SDL2 project using on the command line using emcc. In the my makefile I have the following lines:
debug:
emcc $(wildcard src/*.cpp) \
-sUSE_SDL=2
-o ./out/build/x64-debug \
-lSDL2 \
-lSDL2_image \
-lSDL2_ttf \
-lSDL2_mixer
emcc =02 *.o -o paultris.js ./out/build/x64-debug
when I type make I get the following error:

I don't why it is unable to find the header file as I have specifically told cmake to use lSDL2_ttf. Is there anything else that I need to include in the makefile?
Regards,