configure: --config-musl/-uClibc switch & misc cleanups

- configure:
  - add --config-uClibc,-musl switch and suggest to use
    it if uClibc/musl is detected
  - make warning options magic clang compatible
  - simplify (use $confvars instead of individual options)
- Revert "Remove some unused-parameter lint"
  7443db0d5f841b81a55e918bf8c228dd20f9ddb2
  rather use -Wno-unused-parameter (or just not -Wextra)
- #ifdef functions that are unused on some targets
- tccgen.c: use PTR_SIZE==8 instead of (X86_64 || ARM64)
- tccpe.c: fix some warnings
- integrate dummy arm-asm better

1 files changed, 10 insertions, 12 deletions

diff --git a/tccelf.c b/tccelf.c
index 502f30d..fad23b8 100644
--- a/tccelf.c
+++ b/tccelf.c
@@ -1127,8 +1127,6 @@ 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
 }
 
@@ -1739,7 +1737,7 @@ static void fill_dynamic(TCCState *s1, struct dyn_inf *dyninf)
     put_dt(dynamic, DT_SYMTAB, s1->dynsym->sh_addr);
     put_dt(dynamic, DT_STRSZ, dyninf->dynstr->data_offset);
     put_dt(dynamic, DT_SYMENT, sizeof(ElfW(Sym)));
-#if defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
+#if PTR_SIZE == 8
     put_dt(dynamic, DT_RELA, dyninf->rel_addr);
     put_dt(dynamic, DT_RELASZ, dyninf->rel_size);
     put_dt(dynamic, DT_RELAENT, sizeof(ElfW_Rel));
@@ -2760,7 +2758,7 @@ 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(char *name, int name_size)
+static int ld_next(TCCState *s1, char *name, int name_size)
 {
     int c;
     char *q;
@@ -2905,10 +2903,10 @@ 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(filename, sizeof(filename));
+    t = ld_next(s1, filename, sizeof(filename));
     if (t != '(')
         expect("(");
-    t = ld_next(filename, sizeof(filename));
+    t = ld_next(s1, filename, sizeof(filename));
     for(;;) {
         libname[0] = '\0';
         if (t == LD_TOK_EOF) {
@@ -2918,7 +2916,7 @@ static int ld_add_file_list(TCCState *s1, const char *cmd, int as_needed)
         } else if (t == ')') {
             break;
         } else if (t == '-') {
-            t = ld_next(filename, sizeof(filename));
+            t = ld_next(s1, filename, sizeof(filename));
             if ((t != LD_TOK_NAME) || (filename[0] != 'l')) {
                 tcc_error_noabort("library name expected");
                 ret = -1;
@@ -2953,9 +2951,9 @@ static int ld_add_file_list(TCCState *s1, const char *cmd, int as_needed)
                 }
             }
         }
-        t = ld_next(filename, sizeof(filename));
+        t = ld_next(s1, filename, sizeof(filename));
         if (t == ',') {
-            t = ld_next(filename, sizeof(filename));
+            t = ld_next(s1, filename, sizeof(filename));
         }
     }
     if (group && !as_needed) {
@@ -2981,7 +2979,7 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
 
     ch = handle_eob();
     for(;;) {
-        t = ld_next(cmd, sizeof(cmd));
+        t = ld_next(s1, cmd, sizeof(cmd));
         if (t == LD_TOK_EOF)
             return 0;
         else if (t != LD_TOK_NAME)
@@ -2994,11 +2992,11 @@ ST_FUNC int tcc_load_ldscript(TCCState *s1)
         } else if (!strcmp(cmd, "OUTPUT_FORMAT") ||
                    !strcmp(cmd, "TARGET")) {
             /* ignore some commands */
-            t = ld_next(cmd, sizeof(cmd));
+            t = ld_next(s1, cmd, sizeof(cmd));
             if (t != '(')
                 expect("(");
             for(;;) {
-                t = ld_next(filename, sizeof(filename));
+                t = ld_next(s1, filename, sizeof(filename));
                 if (t == LD_TOK_EOF) {
                     tcc_error_noabort("unexpected end of file");
                     return -1;