# make
cc -O   -ansi -pedantic -U__STRICT_ANSI__ -Wall -Wpointer-arith -Wshadow -Wcast-qual -Wcast-align -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls -Wno-long-long -c mini_httpd.c
mini_httpd.c:102:19: error: conflicting types for ‘int64_t’
 typedef long long int64_t;
                   ^~~~~~~
In file included from /usr/include/x86_64-linux-gnu/sys/types.h:156:0,
                 from /usr/include/stdlib.h:394,
                 from mini_httpd.c:32:
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h:27:19: note: previous declaration of ‘int64_t’ was here
 typedef __int64_t int64_t;
                   ^~~~~~~
mini_httpd.c: In function ‘main’:
mini_httpd.c:497:31: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "%s - %m", logfile );
                               ^
mini_httpd.c:513:43: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
   syslog( LOG_WARNING, "fchown logfile - %m" );
                                           ^
mini_httpd.c:598:33: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "fork - %m" );
                                 ^
mini_httpd.c:625:31: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "%s - %m", pidfile );
                               ^
mini_httpd.c:640:7: warning: implicit declaration of function ‘setgroups’; did you mean ‘getgroups’? [-Wimplicit-function-declaration]
  if ( setgroups( 0, (gid_t*) 0 ) < 0 )
       ^~~~~~~~~
       getgroups
mini_httpd.c:642:38: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "setgroups - %m" );
                                      ^
mini_httpd.c:649:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "setgid - %m" );
                                   ^
mini_httpd.c:654:7: warning: implicit declaration of function ‘initgroups’; did you mean ‘getgroups’? [-Wimplicit-function-declaration]
  if ( initgroups( user, gid ) < 0 )
       ^~~~~~~~~~
       getgroups
mini_httpd.c:656:38: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_ERR, "initgroups - %m" );
                                      ^
mini_httpd.c:670:34: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "chdir - %m" );
                                  ^
mini_httpd.c:686:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "chroot - %m" );
                                   ^
mini_httpd.c:715:41: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "chroot chdir - %m" );
                                         ^
mini_httpd.c:727:43: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "data_dir chdir - %m" );
                                           ^
mini_httpd.c:739:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "setuid - %m" );
                                   ^
mini_httpd.c:819:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "select - %m" );
                                   ^
mini_httpd.c:844:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "accept - %m" );
                                   ^
mini_httpd.c:853:33: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "fork - %m" );
                                 ^
mini_httpd.c: In function ‘read_config’:
mini_httpd.c:897:27: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
  syslog( LOG_CRIT, "%s - %m", filename );
                           ^
mini_httpd.c: In function ‘initialize_listen_socket’:
mini_httpd.c:1097:37: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
  syslog( LOG_CRIT, "socket %.80s - %m", ntoa( usaP ) );
                                     ^
mini_httpd.c:1107:48: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
  syslog( LOG_CRIT, "setsockopt SO_REUSEADDR - %m" );
                                                ^
mini_httpd.c:1114:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
  syslog( LOG_CRIT, "bind %.80s - %m", ntoa( usaP ) );
                                   ^
mini_httpd.c:1121:31: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
  syslog( LOG_CRIT, "listen - %m" );
                               ^
mini_httpd.c: In function ‘auth_check’:
mini_httpd.c:2383:61: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      LOG_ERR, "%.80s auth file %.80s could not be opened - %m",
                                                             ^
mini_httpd.c:2406:19: warning: implicit declaration of function ‘crypt’; did you mean ‘creat’? [-Wimplicit-function-declaration]
      if ( strcmp( crypt( authpass, cryp ), cryp ) == 0 )
                   ^~~~~
                   creat
mini_httpd.c:2406:19: warning: passing argument 1 of ‘strcmp’ makes pointer from integer without a cast [-Wint-conversion]
In file included from mini_httpd.c:35:0:
/usr/include/string.h:136:12: note: expected ‘const char *’ but argument is of type ‘int’
 extern int strcmp (const char *__s1, const char *__s2)
            ^~~~~~
mini_httpd.c: In function ‘send_via_sendfile’:
mini_httpd.c:2812:14: warning: implicit declaration of function ‘my_sendfile’ [-Wimplicit-function-declaration]
  ssize_t r = my_sendfile( fd, s, off, buf_size );
              ^~~~~~~~~~~
mini_httpd.c: In function ‘handle_sigchld’:
mini_httpd.c:3315:35: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
   syslog( LOG_ERR, "child wait - %m" );
                                   ^
mini_httpd.c: In function ‘re_open_logfile’:
mini_httpd.c:3341:31: warning: ISO C does not support the ‘%m’ gnu_printf format [-Wformat=]
      syslog( LOG_CRIT, "%s - %m", logfile );
                               ^
mini_httpd.c: In function ‘main’:
mini_httpd.c:677:5: warning: ignoring return value of ‘getcwd’, declared with attribute warn_unused_result [-Wunused-result]
     (void) getcwd( cwd, sizeof(cwd) - 1 );
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mini_httpd.c: In function ‘do_cgi’:
mini_httpd.c:1925:5: warning: ignoring return value of ‘nice’, declared with attribute warn_unused_result [-Wunused-result]
     (void) nice( CGI_NICE );
     ^~~~~~~~~~~~~~~~~~~~~~~
mini_httpd.c:1938:2: warning: ignoring return value of ‘chdir’, declared with attribute warn_unused_result [-Wunused-result]
  (void) chdir( directory ); /* ignore errors */
  ^~~~~~~~~~~~~~~~~~~~~~~~~
mini_httpd.c: In function ‘post_post_garbage_hack’:
mini_httpd.c:2035:5: warning: ignoring return value of ‘read’, declared with attribute warn_unused_result [-Wunused-result]
     (void) read( conn_fd, buf, sizeof(buf) );
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At top level:
mini_httpd.c:2797:1: warning: ‘send_via_sendfile’ defined but not used [-Wunused-function]
 send_via_sendfile( int fd, int s, off_t size )
 ^~~~~~~~~~~~~~~~~
Makefile:37: recipe for target 'mini_httpd.o' failed
make: *** [mini_httpd.o] Error 1