tccgen: nodata_wanted

The existing variable 'nocode_wanted' is now used to control
output of static data too. So...

(nocode_wanted == 0)
    code and data (normal within functions)
(nocode_wanted < 0)
    means: no code, but data (global or static data)
(nocode_wanted > 0)
    means: no code and no data (code and data suppressed)
(nocode_wanted & 0xC0000000)
    means:  we're in declaration of static data

Also: new option '-dT' to be used with -run
    tcc -dT -run file.c
This will look in file.c for certain comment-boundaries:
    /*-* test-xxx: ...some description */
and then for each test below run it from memory.  This way
various features and error messages can be tested with one
single file.  See 96_nodata_wanted.c for an example.

Also: tccgen.c: one more bitfield fix

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/tests2/96_nodata_wanted.expect b/tests/tests2/96_nodata_wanted.expect
new file mode 100644
index 0000000..0db4ba2
--- /dev/null
+++ b/tests/tests2/96_nodata_wanted.expect
@@ -0,0 +1,24 @@
+/*-* test 1: initializer not computable 1 */
+test 1:3: error: initializer element is not computable at load time
+
+/*-* test 2: initializer not computable 2 */
+test 2:3: error: initializer element is not computable at load time
+
+/*-* test 3: initializer not computable 3 */
+test 3:2: error: initializer element is not computable at load time
+
+/*-* test 4: 2 cast warnings */
+test 4:2: warning: assignment makes integer from pointer without a cast
+test 4:2: warning: nonportable conversion from pointer to char/short
+
+/*-* test 5; nodata_wanted test */
+suppression off
+  static data: 8 - 8.0 - 8.0 - main - static string
+  static bitfields: 333 44 555555 6 7
+  data length is not 0
+suppression on
+  data length is 0
+returns 0
+
+/*-* test 6: some test */
+returns 34