libtcc: cleanup @listfile

Also:
- allow more than one item per line
- respect "quoted items" and escaped quotes \"
  (also for LIBTCCAPI tcc_setoptions)

- cleanup some copy & paste

tcc.h

@@ -638,14 +638,6 @@ struct sym_attr {
 #endif
 };
 
-typedef struct ParseArgsState
-{
-    int run;
-    int pthread;
-    int filetype;
-    CString linker_arg; /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
-} ParseArgsState;
-
 #if !defined(MEM_DEBUG)
 #define tal_free(al, p) tal_free_impl(al, p)
 #define tal_realloc(al, p, size) tal_realloc_impl(&al, p, size)
@@ -682,6 +674,7 @@ typedef struct tal_header_t {
 #endif
 } tal_header_t;
 
+
 struct TCCState {
 
     int verbose; /* if true, display some information during compilation */
@@ -860,7 +853,10 @@ struct TCCState {
     int do_bench; /* option -bench */
     int gen_deps; /* option -MD  */
     char *deps_outfile; /* option -MF */
-    ParseArgsState *parse_args_state;
+
+    int args_pthread; /* -pthread option */
+    CString linker_arg; /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
+    int args_ref; /* tcc_parse_args recursive counter */
 };
 
 struct filespec {
@@ -1312,8 +1308,6 @@ ST_FUNC void preprocess_delete(void);
 ST_FUNC int tcc_preprocess(TCCState *s1);
 ST_FUNC void skip(int c);
 ST_FUNC NORETURN void expect(const char *msg);
-ST_FUNC char *trimfront(char *p);
-ST_FUNC char *trimback(char *a, char *e);
 
 /* ------------ tccgen.c ------------ */