Document libraries needed to compile from scratch

[bfosberry]

Document libraries needed to compile from scratch

[bfosberry]

Installs sdl as per readme, now I get this error

bfosberry@ForeverAlone:~/workspace/sdl2_opengl3$ make
INFO: Compiling 'src/main.c' to 'obj/main.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/main.c -o obj/main.o
INFO: Compiling 'src/3dmath.c' to 'obj/3dmath.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/3dmath.c -o obj/3dmath.o
INFO: Compiling 'src/shader.c' to 'obj/shader.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/shader.c -o obj/shader.o
INFO: Compiling 'src/text.c' to 'obj/text.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/text.c -o obj/text.o
INFO: Compiling 'src/object.c' to 'obj/object.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/object.c -o obj/object.o
INFO: Compiling 'src/plyfile.c' to 'obj/plyfile.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/plyfile.c -o obj/plyfile.o
src/plyfile.c: In function ‘ascii_get_element’:
src/plyfile.c:540:6: error: ‘item’ may be used uninitialized in this function [-Werror=uninitialized]
cc1: all warnings being treated as errors
make: *** [obj/plyfile.o] Error 1
bfosberry@ForeverAlone:~/workspace/sdl2_opengl3$ make
INFO: Compiling 'src/plyfile.c' to 'obj/plyfile.o'...
gcc -std=gnu99 -g -Wall -Werror -O3 -c `sdl2-config --cflags` -I/usr/include src/plyfile.c -o obj/plyfile.o
src/plyfile.c: In function ‘ascii_get_element’:
src/plyfile.c:540:6: error: ‘item’ may be used uninitialized in this function [-Werror=uninitialized]
cc1: all warnings being treated as errors
make: *** [obj/plyfile.o] Error 1