various stuff

win32/Makefile ("for cygwin") removed
- On cygwin, the normal ./configure && make can be used with either
  cygwin's "GCC for Win32 Toolchain"
      ./configure --cross-prefix=i686-w64-mingw32-
  or with an existing tcc:
      ./configure --cc=<old-tccdir>/tcc.exe

tcctest.c:
- exclude test_high_clobbers() on _WIN64 (does not work)

tests2/95_bitfield.c:
- use 'signed char' for ARM (where default 'char' is unsigned)

tests:
- remove -I "expr" diff option to allow tests with
  busybox-diff.

libtcc.c, tcc.c:
- removed -iwithprefix option.  It is supposed to be
  combined with -iprefix which we don't have either.

tccgen.c:
- fix assignments and return of 'void', as in
     void f() {
         void *p, *q;
         *p = *q:
         return *p;
     }
  This appears to be allowed but should do nothing.

tcc.h, libtcc.c, tccpp.c:
- Revert "Introduce VIP sysinclude paths which are always searched first"
  This reverts commit 1d5e386b0a78393ac6b670c209a185849ec798a1.

  The patch was giving tcc's system includes priority over -I which
  is not how it should be.

tccelf.c:
- add DT_TEXTREL tag only if text relocations are actually
  used (which is likely not the case on x86_64)
- prepare_dynamic_rel(): avoid relocation of unresolved
  (weak) symbols

tccrun.c:
- for HAVE_SELINUX, use two mappings to the same (real) file.
  (it was so once except the RX mapping wasn't used at all).

tccpe.c:
- fix relocation constant used for x86_64 (by Andrei E. Warentin)
- #ifndef _WIN32 do "chmod 755 ..." to get runnable exes on cygwin.

tccasm.c:
- keep forward asm labels static, otherwise they will endup
  in dynsym eventually.

configure, Makefile:
- mingw32: respect ./configure options --bindir --docdir --libdir
- allow overriding tcc when building libtcc1.a and libtcc.def with
      make XTCC=<tcc program to use>
- use $(wildcard ...) for install to allow installing just
  a cross compiler for example
      make cross-arm
      make install
- use name <target>-libtcc1.a

build-tcc.bat:
- add  options: -clean, -b bindir

4 files changed, 3 insertions, 5 deletions

diff --git a/tests/tests2/95_bitfields.c b/tests/tests2/95_bitfields.c
index 683becf..f025c57 100644
--- a/tests/tests2/95_bitfields.c
+++ b/tests/tests2/95_bitfields.c
@@ -70,7 +70,7 @@
 {
     struct M P __s {
 	int a;
-	char b;
+	signed char b;
 	int x : 12, y : 4, : 0, : 4, z : 3;
 	char d;
     };
diff --git a/tests/tests2/96_nodata_wanted.c b/tests/tests2/96_nodata_wanted.c
index b594938..cc211d3 100644
--- a/tests/tests2/96_nodata_wanted.c
+++ b/tests/tests2/96_nodata_wanted.c
@@ -78,7 +78,7 @@ te1:;
     tl += &&te1 - &&ts1;
     printf("size of data/text:\n  %s/%s\n",
         dl ? "non-zero":"zero", tl ? "non-zero":"zero");
-    printf("# %d/%d\n", dl, tl);
+    /*printf("# %d/%d\n", dl, tl);*/
 }
 
 #endif
diff --git a/tests/tests2/96_nodata_wanted.expect b/tests/tests2/96_nodata_wanted.expect
index 6e54f24..2749109 100644
--- a/tests/tests2/96_nodata_wanted.expect
+++ b/tests/tests2/96_nodata_wanted.expect
@@ -17,9 +17,7 @@ data:
   333 44 555555 6 7
 size of data/text:
   non-zero/non-zero
-# 111/193
 
 [test_data_suppression_on]
 size of data/text:
   zero/zero
-# 0/0
diff --git a/tests/tests2/Makefile b/tests/tests2/Makefile
index 6bff618..190b2d9 100644
--- a/tests/tests2/Makefile
+++ b/tests/tests2/Makefile
@@ -70,7 +70,7 @@ all test tests2.all: $(filter-out $(SKIP),$(TESTS)) ;
 T1 = $(TCC) $(FLAGS) $< -o a.exe && ./a.exe $(ARGS)
 T2 = $(TCC) $(FLAGS) -run $< $(ARGS)
 T3 = $(FILTER) >$*.output 2>&1 || true \
-     && diff -Nbu -I "^\#" $(filter %.expect,$^) $*.output \
+     && diff -Nbu $(filter %.expect,$^) $*.output \
      && rm -f $*.output $(filter $*.expect,$(GEN-ALWAYS))
 
 # run single test and update .expect file, e.g. "make tests2.37+"