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, 5 insertions, 4 deletions

diff --git a/tccpe.c b/tccpe.c
index e392f40..0fd8c36 100644
--- a/tccpe.c
+++ b/tccpe.c
@@ -1767,17 +1767,18 @@ static void pe_add_runtime(TCCState *s1, struct pe_info *pe)
             ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
             SHN_UNDEF, start_symbol);
 
+    tcc_add_pragma_libs(s1);
+
     if (0 == s1->nostdlib) {
         static const char *libs[] = {
-            "libtcc1.a", "msvcrt", "kernel32", "", "user32", "gdi32", NULL
+            "tcc1", "msvcrt", "kernel32", "", "user32", "gdi32", NULL
         };
         const char **pp, *p;
         for (pp = libs; 0 != (p = *pp); ++pp) {
             if (0 == *p) {
                 if (PE_DLL != pe_type && PE_GUI != pe_type)
                     break;
-            } else if (pp == libs ? tcc_add_dll(s1, p, 0) : tcc_add_library(s1, p)) {
-                tcc_error_noabort("cannot find library: %s", p);
+            } else if (tcc_add_library_err(s1, p) < 0) {
                 break;
             }
         }
@@ -1805,8 +1806,8 @@ ST_FUNC int pe_output_file(TCCState * s1, const char *filename)
     pe.filename = filename;
     pe.s1 = s1;
 
-    tcc_add_bcheck(s1);
     pe_add_runtime(s1, &pe);
+    tcc_add_bcheck(s1);
     relocate_common_syms(); /* assign bss adresses */
     tcc_add_linker_symbols(s1);