tcc.c: fix previous commit "Use CString to concat linker options"

- remove redunant else branch
- zero-terminate linker_arg
- declare cstr_xxx as PUB_FUNC
  (which are functions used in tcc.c but not in the libtcc API.
   Useful for a tcc(.exe) that uses the libtcc.(so/dll))
- while at it, export PUB_FUNCs from dll

tcc.c

@@ -283,9 +283,9 @@ static int parse_args(TCCState *s, int argc, char **argv)
     int was_pthread;
 
     was_pthread = 0; /* is set if commandline contains -pthread key */
-
     optind = 1;
     cstr_new(&linker_arg);
+
     while (optind < argc) {
 
         r = argv[optind++];
@@ -444,12 +444,10 @@ static int parse_args(TCCState *s, int argc, char **argv)
                 s->rdynamic = 1;
                 break;
             case TCC_OPTION_Wl:
-                if (!linker_arg.data_allocated)
-                    cstr_cat(&linker_arg, optarg);
-                else {
-                    cstr_ccat(&linker_arg, ',');
-                    cstr_cat(&linker_arg, optarg);
-                }
+                if (linker_arg.size)
+                    --linker_arg.size, cstr_ccat(&linker_arg, ',');
+                cstr_cat(&linker_arg, optarg);
+                cstr_ccat(&linker_arg, '\0');
                 break;
             case TCC_OPTION_E:
                 output_type = TCC_OUTPUT_PREPROCESS;
@@ -471,8 +469,8 @@ static int parse_args(TCCState *s, int argc, char **argv)
             }
         }
     }
-    if ((r = (char *) tcc_set_linker(s, (char *) linker_arg.data, TRUE)))
-        tcc_error("unsupported linker option '%s'", r);
+    if (NULL != (r1 = tcc_set_linker(s, (char *) linker_arg.data, TRUE)))
+        tcc_error("unsupported linker option '%s'", r1);
     /* fixme: these options could be different on your platform */
     if (was_pthread && output_type != TCC_OUTPUT_OBJ) {
         dynarray_add((void ***)&files, &nb_files, "-lpthread");

tcc.h

@@ -51,6 +51,7 @@
 #define inp next_inp
 #ifdef LIBTCC_AS_DLL
 # define LIBTCCAPI __declspec(dllexport)
+# define PUB_FUNC LIBTCCAPI
 #endif
 #endif
 
@@ -989,12 +990,11 @@ PUB_FUNC void tcc_error(const char *fmt, ...);
 PUB_FUNC void tcc_warning(const char *fmt, ...);
 
 /* other utilities */
-ST_INLN void cstr_ccat(CString *cstr, int ch);
-ST_FUNC void cstr_cat(CString *cstr, const char *str);
-ST_FUNC void cstr_wccat(CString *cstr, int ch);
-ST_FUNC void cstr_new(CString *cstr);
-ST_FUNC void cstr_free(CString *cstr);
-ST_FUNC void add_char(CString *cstr, int c);
+PUB_FUNC void cstr_ccat(CString *cstr, int ch);
+PUB_FUNC void cstr_cat(CString *cstr, const char *str);
+PUB_FUNC void cstr_wccat(CString *cstr, int ch);
+PUB_FUNC void cstr_new(CString *cstr);
+PUB_FUNC void cstr_free(CString *cstr);
 #define cstr_reset(cstr) cstr_free(cstr)
 
 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags);

tccpp.c

@@ -120,7 +120,7 @@ static void cstr_realloc(CString *cstr, int new_size)
 }
 
 /* add a byte */
-ST_INLN void cstr_ccat(CString *cstr, int ch)
+PUB_FUNC void cstr_ccat(CString *cstr, int ch)
 {
     int size;
     size = cstr->size + 1;
@@ -130,7 +130,7 @@ ST_INLN void cstr_ccat(CString *cstr, int ch)
     cstr->size = size;
 }
 
-ST_FUNC void cstr_cat(CString *cstr, const char *str)
+PUB_FUNC void cstr_cat(CString *cstr, const char *str)
 {
     int c;
     for(;;) {
@@ -143,7 +143,7 @@ ST_FUNC void cstr_cat(CString *cstr, const char *str)
 }
 
 /* add a wide char */
-ST_FUNC void cstr_wccat(CString *cstr, int ch)
+PUB_FUNC void cstr_wccat(CString *cstr, int ch)
 {
     int size;
     size = cstr->size + sizeof(nwchar_t);
@@ -153,20 +153,20 @@ ST_FUNC void cstr_wccat(CString *cstr, int ch)
     cstr->size = size;
 }
 
-ST_FUNC void cstr_new(CString *cstr)
+PUB_FUNC void cstr_new(CString *cstr)
 {
     memset(cstr, 0, sizeof(CString));
 }
 
 /* free string and reset it to NULL */
-ST_FUNC void cstr_free(CString *cstr)
+PUB_FUNC void cstr_free(CString *cstr)
 {
     tcc_free(cstr->data_allocated);
     cstr_new(cstr);
 }
 
 /* XXX: unicode ? */
-ST_FUNC void add_char(CString *cstr, int c)
+static void add_char(CString *cstr, int c)
 {
     if (c == '\'' || c == '\"' || c == '\\') {
         /* XXX: could be more precise if char or string */

win32/build-tcc.bat

@@ -34,7 +34,7 @@ copy ..\libtcc.h libtcc\libtcc.h
 tiny_impdef libtcc.dll -o lib/libtcc.def
 
 :tcc
-%CC% %target% -DONE_SOURCE ../tcc.c -o tcc.exe -ltcc -Llibtcc
+%CC% %target% ../tcc.c -o tcc.exe -ltcc -Llibtcc
 
 :copy_std_includes
 copy ..\include\*.h include