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, 13 insertions, 3 deletions

diff --git a/tests/libtcc_test.c b/tests/libtcc_test.c
index 414cc9b..109e488 100644
--- a/tests/libtcc_test.c
+++ b/tests/libtcc_test.c
@@ -16,7 +16,7 @@ int add(int a, int b)
 }
 
 char my_program[] =
-"#include <stdio.h> // printf()\n"
+"#include <tcclib.h>\n" /* include the "Simple libc header for TCC" */
 "extern int add(int a, int b);\n"
 "int fib(int n)\n"
 "{\n"
@@ -37,6 +37,7 @@ char my_program[] =
 int main(int argc, char **argv)
 {
     TCCState *s;
+    int i;
     int (*func)(int);
 
     s = tcc_new();
@@ -46,8 +47,17 @@ int main(int argc, char **argv)
     }
 
     /* if tcclib.h and libtcc1.a are not installed, where can we find them */
-    if (argc == 2 && !memcmp(argv[1], "lib_path=",9))
-        tcc_set_lib_path(s, argv[1]+9);
+    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);
+        }
+    }
 
     /* MUST BE CALLED before any compilation */
     tcc_set_output_type(s, TCC_OUTPUT_MEMORY);