[1] finn@FinnAndTheThreeFurys> sudo pacman -Q lua51      ~/Documents/git/pwnfps
[sudo] password for finn:
lua51 5.1.5-4
finn@FinnAndTheThreeFurys> gcc -g -fopenmp -ffast-math -funroll-loops -O3 -o pwnfps main.c `sdl-config --cflags --libs` `pkg-config lua51 --cflags --libs` -lm -Wall -Wextra -Wno-unused-parameter
Package lua51 was not found in the pkg-config search path.
Perhaps you should add the directory containing `lua51.pc'
to the PKG_CONFIG_PATH environment variable
No package 'lua51' found
main.c: In function ‘mainloop’:
main.c:222:7: warning: unused variable ‘bcy’ [-Wunused-variable]
   int bcy = (int)by1;
       ^
main.c:78:8: warning: unused variable ‘cangy’ [-Wunused-variable]
  float cangy = 0.0f;
        ^
main.c:77:8: warning: unused variable ‘cangx’ [-Wunused-variable]
  float cangx = 0.0f;
        ^
main.c:71:6: warning: variable ‘k_turndown’ set but not used [-Wunused-but-set-variable]
  int k_turndown = 0;
      ^
main.c:70:6: warning: variable ‘k_turnup’ set but not used [-Wunused-but-set-variable]
  int k_turnup = 0;
      ^
/tmp/ccAyNhsl.o: In function `lf_obj_free':
/home/finn/Documents/git/pwnfps/script.h:45: undefined reference to `lua_touserdata'
/tmp/ccAyNhsl.o: In function `lf_obj_set':
/home/finn/Documents/git/pwnfps/script.h:12: undefined reference to `lua_touserdata'
/home/finn/Documents/git/pwnfps/script.h:15: undefined reference to `lua_tolstring'
/home/finn/Documents/git/pwnfps/script.h:22: undefined reference to `lua_tonumberx'
/home/finn/Documents/git/pwnfps/script.h:23: undefined reference to `lua_tonumberx'
/home/finn/Documents/git/pwnfps/script.h:25: undefined reference to `lua_tonumberx'
/home/finn/Documents/git/pwnfps/script.h:26: undefined reference to `lua_tonumberx'
/home/finn/Documents/git/pwnfps/script.h:27: undefined reference to `lua_tonumberx'
/tmp/ccAyNhsl.o:/home/finn/Documents/git/pwnfps/script.h:30: more undefined references to `lua_tonumberx' follow
/tmp/ccAyNhsl.o: In function `lf_obj_set':
/home/finn/Documents/git/pwnfps/script.h:38: undefined reference to `lua_pushlightuserdata'
/tmp/ccAyNhsl.o: In function `lf_level_get':
/home/finn/Documents/git/pwnfps/script.h:56: undefined reference to `lua_tointegerx'
/home/finn/Documents/git/pwnfps/script.h:57: undefined reference to `lua_tointegerx'
/home/finn/Documents/git/pwnfps/script.h:60: undefined reference to `lua_pushlstring'
/tmp/ccAyNhsl.o: In function `lf_obj_new':
/home/finn/Documents/git/pwnfps/script.h:6: undefined reference to `lua_pushlightuserdata'
/tmp/ccAyNhsl.o: In function `script_newvm':
/home/finn/Documents/git/pwnfps/script.h:73: undefined reference to `luaL_newstate'
/home/finn/Documents/git/pwnfps/script.h:77: undefined reference to `luaL_openlibs'
/home/finn/Documents/git/pwnfps/script.h:79: undefined reference to `lua_pushcclosure'
/home/finn/Documents/git/pwnfps/script.h:79: undefined reference to `lua_setglobal'
/home/finn/Documents/git/pwnfps/script.h:80: undefined reference to `lua_pushcclosure'
/home/finn/Documents/git/pwnfps/script.h:80: undefined reference to `lua_setglobal'
/home/finn/Documents/git/pwnfps/script.h:81: undefined reference to `lua_pushcclosure'
/home/finn/Documents/git/pwnfps/script.h:81: undefined reference to `lua_setglobal'
/home/finn/Documents/git/pwnfps/script.h:82: undefined reference to `lua_pushcclosure'
/home/finn/Documents/git/pwnfps/script.h:82: undefined reference to `lua_setglobal'
/home/finn/Documents/git/pwnfps/script.h:83: undefined reference to `lua_pushcclosure'
/home/finn/Documents/git/pwnfps/script.h:83: undefined reference to `lua_setglobal'
/home/finn/Documents/git/pwnfps/script.h:86: undefined reference to `luaL_loadfilex'
/home/finn/Documents/git/pwnfps/script.h:93: undefined reference to `lua_pcallk'
/home/finn/Documents/git/pwnfps/script.h:88: undefined reference to `lua_tolstring'
/home/finn/Documents/git/pwnfps/script.h:95: undefined reference to `lua_tolstring'
/tmp/ccAyNhsl.o: In function `mainloop':
/home/finn/Documents/git/pwnfps/main.c:125: undefined reference to `lua_getglobal'
/home/finn/Documents/git/pwnfps/main.c:126: undefined reference to `lua_type'
/home/finn/Documents/git/pwnfps/main.c:132: undefined reference to `lua_pushnumber'
/home/finn/Documents/git/pwnfps/main.c:133: undefined reference to `lua_pushnumber'
/home/finn/Documents/git/pwnfps/main.c:134: undefined reference to `lua_pcallk'
/home/finn/Documents/git/pwnfps/main.c:136: undefined reference to `lua_tolstring'
/tmp/ccAyNhsl.o: In function `lf_obj_free':
/home/finn/Documents/git/pwnfps/script.h:46: undefined reference to `luaL_error'
/tmp/ccAyNhsl.o: In function `lf_obj_set':
/home/finn/Documents/git/pwnfps/script.h:35: undefined reference to `luaL_error'
/home/finn/Documents/git/pwnfps/script.h:16: undefined reference to `luaL_error'
/tmp/ccAyNhsl.o: In function `lf_obj_new':
/home/finn/Documents/git/pwnfps/script.h:4: undefined reference to `luaL_error'
collect2: error: ld returned 1 exit status
[1] finn@FinnAndTheThreeFurys>                           ~/Documents/git/pwnfps