tccpp: fix issues, add tests

* fix some macro expansion issues
* add some pp tests in tests/pp
* improved tcc -E output for better diff'ability
* remove -dD feature (quirky code, exotic feature,
  didn't work well)

Based partially on ideas / researches from PipCet

Some issues remain with VA_ARGS macros (if used in a
rather tricky way).

Also, to keep it simple, the pp doesn't automtically
add any extra spaces to separate tokens which otherwise
would form wrong tokens if re-read from tcc -E output
(such as '+' '=')  GCC does that, other compilers don't.

 * cleanups
  - #line 01 "file" / # 01 "file" processing
  - #pragma comment(lib,"foo")
  - tcc -E: forward some pragmas to output (pack, comment(lib))
  - fix macro parameter list parsing mess from
    a3fc54345949535524d01319e1ca6378b7c2c201
    a715d7143d9d17da17e67fec6af1c01409a71a31
    (some coffee might help, next time ;)
  - introduce TOK_PPSTR - to have character constants as
    written in the file (similar to TOK_PPNUM)
  - allow '\' appear in macros
  - new functions begin/end_macro to:
      - fix switching macro levels during expansion
      - allow unget_tok to unget more than one tok
  - slight speedup by using bitflags in isidnum_table

Also:
  - x86_64.c : fix decl after statements
  - i386-gen,c : fix a vstack leak with VLA on windows
  - configure/Makefile : build on windows (MSYS) was broken
  - tcc_warning: fflush stderr to keep output order (win32)

1 files changed, 25 insertions, 14 deletions

diff --git a/tests/abitest.c b/tests/abitest.c
index 9cdeb87..896e97b 100644
--- a/tests/abitest.c
+++ b/tests/abitest.c
@@ -13,8 +13,24 @@
 #define LONG_DOUBLE_LITERAL(x) x ## L
 #endif
 
-static const char *tccdir = NULL;
-static const char *include_dir = NULL;
+static int g_argc;
+static char **g_argv;
+
+static void set_options(TCCState *s, int argc, char **argv)
+{
+    int i;
+    for (i = 1; i < argc; ++i) {
+        char *a = argv[i];
+        if (a[0] == '-') {
+            if (a[1] == 'B')
+                tcc_set_lib_path(s, a+2);
+            else if (a[1] == 'I')
+                tcc_add_include_path(s, a+2);
+            else if (a[1] == 'L')
+                tcc_add_library_path(s, a+2);
+        }
+    }
+}
 
 typedef int (*callback_type) (void*);
 
@@ -29,12 +45,9 @@ static int run_callback(const char *src, callback_type callback) {
   s = tcc_new();
   if (!s)
     return -1;
-  if (tccdir)
-    tcc_set_lib_path(s, tccdir);
-  if (include_dir) {
-    if (tcc_add_include_path(s, include_dir) == -1)
-      return -1;
-  }
+
+  set_options(s, g_argc, g_argv);
+
   if (tcc_set_output_type(s, TCC_OUTPUT_MEMORY) == -1)
     return -1;
   if (tcc_compile_string(s, src) == -1)
@@ -611,13 +624,11 @@ int main(int argc, char **argv) {
   
   /* if tcclib.h and libtcc1.a are not installed, where can we find them */
   for (i = 1; i < argc; ++i) {
-    if (!memcmp(argv[i], "lib_path=",9))
-      tccdir = argv[i] + 9;
-    else if (!memcmp(argv[i], "run_test=", 9))
+    if (!memcmp(argv[i], "run_test=", 9))
       testname = argv[i] + 9;
-    else if (!memcmp(argv[i], "include=", 8))
-      include_dir = argv[i] + 8;
-  }   
+  }
+
+  g_argv = argv, g_argc = argc;
 
   RUN_TEST(ret_int_test);
   RUN_TEST(ret_longlong_test);