Re: build with clang-3.4 warnings report

[Abdoulaye Walsimou Gaye <awg@embtoolkit.org>]

OK I was not building with --enable-warnings! Here is another round without bogus warnings you rejected:
-Wstring-plus-int
-Wtautological-constant-out-of-range-compare

Thanks,
awg

src/aio/aio_readwrite.c:20:16: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
   .__si_fields.__sigchld.si_pid = __pthread_self()->pid,
               ~^~~~~~~~~
src/aio/aio_readwrite.c:18:20: note: previous initialization is here
   .__si_fields.__rt.si_sigval = sev->sigev_value,
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/aio/aio_readwrite.c:8:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy(void)
             ^
2 warnings generated.
src/aio/lio_listio.c:47:16: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
   .__si_fields.__sigchld.si_pid = __pthread_self()->pid,
               ~^~~~~~~~~
src/aio/lio_listio.c:45:20: note: previous initialization is here
   .__si_fields.__rt.si_sigval = sev->sigev_value,
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
src/env/__init_security.c:8:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy(void *ent)
             ^
1 warning generated.
src/env/__init_tls.c:46:14: warning: function 'simple' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void *simple(void *p)
              ^
1 warning generated.
src/env/__libc_start_main.c:9:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy() {}
             ^
1 warning generated.
In file included from src/errno/strerror.c:7:
src/errno/__strerror.h:100:1: warning: implicit conversion from 'int' to 'unsigned char' changes value from 1133 to 109 [-Wconstant-conversion]
1133,
^~~~
1 warning generated.
src/exit/exit.c:7:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy()
             ^
1 warning generated.
src/exit/quick_exit.c:6:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy() { }
             ^

src/mman/mmap.c:9:13: warning: function 'dummy1' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy1(int x) { }
             ^
src/mman/mmap.c:10:13: warning: function 'dummy0' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy0(void) { }
             ^
2 warnings generated.
src/mman/munmap.c:5:13: warning: function 'dummy1' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy1(int x) { }
             ^
src/mman/munmap.c:6:13: warning: function 'dummy0' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy0(void) { }
             ^
2 warnings generated.
src/process/fork.c:7:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy(int x)
             ^
1 warning generated.
src/regex/regcomp.c:3123:18: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
     do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
          ~~~~~~~ ^ ~~~~~~~
src/regex/regcomp.c:3156:15: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
  do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
       ~~~~~~~ ^ ~~~~~~~
src/regex/regcomp.c:3181:15: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
  do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
       ~~~~~~~ ^ ~~~~~~~
src/regex/regcomp.c:3189:18: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
     do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
          ~~~~~~~ ^ ~~~~~~~
src/regex/regcomp.c:3206:18: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
     do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
          ~~~~~~~ ^ ~~~~~~~
src/regex/regcomp.c:3235:18: warning: explicitly assigning a variable of type 'reg_errcode_t' (aka 'int') to itself [-Wself-assign]
     do { errcode = errcode; if ( 1) goto error_exit; } while ( 0);
          ~~~~~~~ ^ ~~~~~~~
6 warnings generated.
src/signal/sigaction.c:11:18: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static pthread_t dummy(void) { return 0; }
                  ^
1 warning generated.
src/stdio/__stdio_exit.c:3:20: warning: variable 'dummy_file' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static FILE *const dummy_file = 0;
                    ^
1 warning generated.
src/stdio/__toread.c:16:18: warning: variable 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static const int dummy = 0;
                  ^
1 warning generated.
src/stdio/fflush.c:22:20: warning: variable 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static FILE *const dummy = 0;
                    ^
1 warning generated.

src/thread/cancel_dummy.c:4:13: warning: function 'sccp' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static long sccp(syscall_arg_t nr,
             ^
src/thread/cancel_dummy.c:13:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy()
             ^
2 warnings generated.
src/thread/cancellation.c:3:13: warning: function 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy(struct __ptcb *cb)
             ^
1 warning generated.
src/thread/pthread_create.c:7:13: warning: function 'dummy_0' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy_0()
             ^
src/thread/pthread_create.c:111:21: warning: variable 'dummy' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static const size_t dummy = 0;
                     ^
src/thread/pthread_create.c:114:20: warning: variable 'dummy_file' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static FILE *const dummy_file = 0;
                    ^
3 warnings generated.

src/time/timer_create.c:17:13: warning: function 'dummy_1' is not needed and will not be emitted [-Wunneeded-internal-declaration]
static void dummy_1(pthread_t self)
             ^
1 warning generated.