Remove some unused-parameter lint

Mark TCCState parameter as unused in tcc_undefine_symbol(), tcc_add_symbol(),
tcc_print_stats(), asm_get_local_label_name(), use_section1(), tccpp_delete(),
tcc_tool_ar(), tcc_tool_impdef(), and tcc_tool_cross().
Also mark it unused in tcc_add_bcheck() unless CONFIG_TCC_BCHECK.
Remove it entirely in ld_next().

libtcc.c

@@ -702,6 +702,7 @@ LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 {
     TokenSym *ts;
     Sym *s;
+    (void) s1;  /* not used */
     ts = tok_alloc(sym, strlen(sym));
     s = define_find(ts->tok);
     /* undefine symbol by putting an invalid name */
@@ -1191,6 +1192,7 @@ LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
        So it is handled here as if it were in a DLL. */
     pe_putimport(s, 0, name, (uintptr_t)val);
 #else
+    (void) s;  /* not used */
     set_elf_sym(symtab_section, (uintptr_t)val, 0,
         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
         SHN_ABS, name);
@@ -1984,6 +1986,7 @@ LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
 
 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
 {
+    (void) s;  /* not used */
     if (total_time < 1)
         total_time = 1;
     if (total_bytes < 1)

tccasm.c

@@ -26,6 +26,7 @@ ST_FUNC int asm_get_local_label_name(TCCState *s1, unsigned int n)
     char buf[64];
     TokenSym *ts;
 
+    (void) s1;  /* not used */
     snprintf(buf, sizeof(buf), "L..%u", n);
     ts = tok_alloc(buf, strlen(buf));
     return ts->tok;
@@ -434,6 +435,7 @@ static void asm_free_labels(TCCState *st)
 
 static void use_section1(TCCState *s1, Section *sec)
 {
+    (void) s1;  /* not used */
     cur_text_section->data_offset = ind;
     cur_text_section = sec;
     ind = cur_text_section->data_offset;

tccelf.c

@@ -1127,6 +1127,8 @@ ST_FUNC void tcc_add_bcheck(TCCState *s1)
             init_section->data_offset - 4, R_386_PC32, sym_index);
             /* R_386_PC32 = R_X86_64_PC32 = 2 */
     }
+#else
+    (void) s1;  /* not used */
 #endif
 }
 
@@ -2758,7 +2760,7 @@ ST_FUNC int tcc_load_dll(TCCState *s1, int fd, const char *filename, int level)
 #define LD_TOK_EOF  (-1)
 
 /* return next ld script token */
-static int ld_next(TCCState *s1, char *name, int name_size)
+static int ld_next(char *name, int name_size)
 {
     int c;
     char *q;
@@ -2903,10 +2905,10 @@ static int ld_add_file_list(TCCState *s1, const char *cmd, int as_needed)
     group = !strcmp(cmd, "GROUP");
     if (!as_needed)
         new_undef_syms();
-    t = ld_next(s1, filename, sizeof(filename));
+    t = ld_next(filename, sizeof(filename));
     if (t != '(')
         expect("(");
-    t = ld_next(s1, filename, sizeof(filename));
+    t = ld_next(filename, sizeof(filename));
     for(;;) {
         libname[0] = '\0';
         if (t == LD_TOK_EOF) {
@@ -2916,7 +2918,7 @@ static int ld_add_file_list(TCCState *s1, const char *cmd, int as_needed)
         } else if (t == ')') {
             break;
         } else if (t == '-') {
-            t = ld_next(s1, filename, sizeof(filename));
+            t = ld_next(filename, sizeof(filename));
             if ((t != LD_TOK_NAME) || (filename[0] != 'l')) {
                 tcc_error_noabort("library name expected");
                 ret = -1;
@@ -2951,9 +2953,9 @@ static int ld_add_file_list(TCCState *s1, const char *cmd, int as_needed)
                 }
             }
         }
-        t = ld_next(s1, filename, sizeof(filename));
+        t = ld_next(filename, sizeof(filename));
         if (t == ',') {
-            t = ld_next(s1, filename, sizeof(filename));
+            t = ld_next(filename, sizeof(filename));
         }
     }
     if (group && !as_needed) {
@@ -2979,7 +2981,7 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
 
     ch = handle_eob();
     for(;;) {
-        t = ld_next(s1, cmd, sizeof(cmd));
+        t = ld_next(cmd, sizeof(cmd));
         if (t == LD_TOK_EOF)
             return 0;
         else if (t != LD_TOK_NAME)
@@ -2992,11 +2994,11 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
         } else if (!strcmp(cmd, "OUTPUT_FORMAT") ||
                    !strcmp(cmd, "TARGET")) {
             /* ignore some commands */
-            t = ld_next(s1, cmd, sizeof(cmd));
+            t = ld_next(cmd, sizeof(cmd));
             if (t != '(')
                 expect("(");
             for(;;) {
-                t = ld_next(s1, filename, sizeof(filename));
+                t = ld_next(filename, sizeof(filename));
                 if (t == LD_TOK_EOF) {
                     tcc_error_noabort("unexpected end of file");
                     return -1;

tccpp.c

@@ -3557,6 +3557,7 @@ ST_FUNC void tccpp_delete(TCCState *s)
 {
     int i, n;
 
+    (void) s;  /* not used */
     /* free -D and compiler defines */
     free_defines(NULL);
 

tcctools.c

@@ -104,6 +104,7 @@ ST_FUNC int tcc_tool_ar(TCCState *s1, int argc, char **argv)
     const char *ops_conflict = "habdioptxN";  // unsupported but destructive if ignored.
     int verbose = 0;
 
+    (void) s1;  /* not used */
     i_lib = 0; i_obj = 0;  // will hold the index of the lib and first obj
     for (i = 1; i < argc; i++) {
         const char *a = argv[i];
@@ -321,6 +322,7 @@ ST_FUNC int tcc_tool_impdef(TCCState *s1, int argc, char **argv)
     p = NULL;
     v = 0;
 
+    (void) s1;  /* not used */
     for (i = 1; i < argc; ++i) {
         const char *a = argv[i];
         if ('-' == a[0]) {
@@ -433,6 +435,7 @@ the_end:
 
 ST_FUNC void tcc_tool_cross(TCCState *s, char **argv, int option)
 {
+    (void) s;  (void) argv;  /* not used */
     tcc_error("-m%d not implemented.", option);
 }
 
@@ -486,6 +489,7 @@ ST_FUNC void tcc_tool_cross(TCCState *s, char **argv, int target)
     char *a0 = argv[0];
     int prefix = tcc_basename(a0) - a0;
 
+    (void) s;  /* not used */
     snprintf(program, sizeof program,
         "%.*s%s"
 #ifdef TCC_TARGET_PE