gcc -o foo foo.c 
/tmp/ccWYEf9B.o: In function `main':
foo.c:(.text+0x17): undefined reference to `luaL_newstate'
foo.c:(.text+0x25): undefined reference to `luaopen_base'
foo.c:(.text+0x30): undefined reference to `luaopen_table'
foo.c:(.text+0x3b): undefined reference to `luaopen_io'
foo.c:(.text+0x46): undefined reference to `luaopen_string'
foo.c:(.text+0x51): undefined reference to `luaopen_math'
foo.c:(.text+0x9d): undefined reference to `luaL_loadbuffer'
foo.c:(.text+0xc4): undefined reference to `lua_pcall'
foo.c:(.text+0x10e): undefined reference to `lua_tolstring'
foo.c:(.text+0x12d): undefined reference to `lua_settop'
foo.c:(.text+0x15f): undefined reference to `lua_close'
collect2: ld returned 1 exit status