fr1sk@localhost ~/D/f/O/0x01> gcc -std=c99 mkfile.c
mkfile.c: In function ‘main’:
mkfile.c:66:41: warning: passing argument 3 of ‘osErrorFatal’ makes integer from pointer without a cast [-Wint-conversion]
     osAssert(3==argc, "Wrong num of cmd");
                                         ^
mkfile.c:14:6: note: expected ‘int’ but argument is of type ‘char *’
 void osErrorFatal(bool cond,
      ^~~~~~~~~~~~
mkfile.c:66:41: warning: passing argument 4 of ‘osErrorFatal’ makes pointer from integer without a cast [-Wint-conversion]
     osAssert(3==argc, "Wrong num of cmd");
                                         ^
mkfile.c:14:6: note: expected ‘const char *’ but argument is of type ‘int’
 void osErrorFatal(bool cond,
      ^~~~~~~~~~~~
mkfile.c:68:64: warning: passing argument 3 of ‘osErrorFatal’ makes integer from pointer without a cast [-Wint-conversion]
     osAssert(osOpenFile(argv[1],argv[2], &fd), "Opening failed");
                                                                ^
mkfile.c:14:6: note: expected ‘int’ but argument is of type ‘char *’
 void osErrorFatal(bool cond,
      ^~~~~~~~~~~~
mkfile.c:68:64: warning: passing argument 4 of ‘osErrorFatal’ makes pointer from integer without a cast [-Wint-conversion]
     osAssert(osOpenFile(argv[1],argv[2], &fd), "Opening failed");
                                                                ^
mkfile.c:14:6: note: expected ‘const char *’ but argument is of type ‘int’
 void osErrorFatal(bool cond,
      ^~~~~~~~~~~~