- integrate CONST_WANTED with nocode_wanted
- expr_const() checks VT_NONCONST

- tccpp.c: rename ... to __TCC_BCHECK__/__TCC_BACKTRACE__
- libtcc.c: correct total line count
- libtcc.c: support -run -- args... (instead of -run @ args ...)
- Makefile/build-tcc.bat: streamline GITHASH string somewhat
- bt-exe.c: avoid redef of pstrcpy() with 'tcc -bt tcc.c ...'

avoid memory leaks with lost CStrings on stack after errors.

tccpp.c:
- use/abuse static Cstring tokcstr where possible
tccgen.c:
- use/abuse static Cstring initstr where possible
tcc.h/libtcc.a:
- add 'stk_data' array to track memory pointer on stack
- add macros stk_push/pop() and cstr_new/free_s()
tccasm.c:
- use that
- use char[16] instead of char* for op.constraint

libtcc.c:
- guard tcc_realloc/free_debug() with a semaphore
tccdbg.c:
- allow tcc_debug_end() to be called twice safely

This avoids 'exit(1)' with errors outside of compilation
(nasty in particular with libtcc usage)

As a sideeffect multiple errors can be seen for linker
errors (such as undefined symbols, relocation errors, ...)

tccgen.c:
- allow cross-compiling 0.0L (cross-compile tcc with tcc)
tccelf.c:
- use alignment of TLS section for PT_TLS
tccpp.c:
- support long double constants on systems that do not support
  long doubles (i.e. mark them (VT_DOUBLE | VT_LONG))
tccdefs.h:
  #define __has_feature() for android
  remove _unaligned (why define a msvc extension under !_WIN32)

reported by "vsfos"
https://lists.gnu.org/archive/html/tinycc-devel/2023-04/msg00007.html

- Correct stack adjustment in gfunc_call()
- Add a regression test (130_large_argument)

Value 0 and values >2GB where printed wrong during tests with yarpgen (v1)
Starting the output with a hashtag make it compatible to TAP

--
Regards ... Detlef

These extensions where used by other compiler
to generate different code on old cpu's (arm and x86 before pentium/pentiumpro)
to prevent processor exceptions / very high delays when accessing an unaligned pointer.

--
Regards ... Detlef

Use old (=no) if autodetect succeeded and osx ver <= 10, else new.
Override is possible, and now also documented at ./configure --help.

if we include standard headers on glibc-based systems then
we can't use '__attribute__' (those are defined away for unknown
compilers) but must use '__attribute' (or #undef that token).

tccgen.c:
- just track local_stack for small scopes (can't declare variables)
- fix a vla problem with nested scopes
- move debug N_L/RBRAC into curly braced block

Also:
- tccpp.c: move 'label_...' functions to tccgen.c
- tccpp.c: let get_tok_str() say "<no name>" for anonymous symbols
- tcctest.c: let __pa_symbol() work for memory > 2GB
- 119_random_stuff.c: revert strtoll test (no reason to test libc)
- tccdefs.h/tcctest.c: enable bit fncs for _WIN32
- Makefile:
  - use i686-linux-gnu instead of i386-linux-gnu for cross-i386
  - update 'make help'
  - revert umplicit 'make all' with 'make install' (but print warning)

instead in vcheck_cmp(), pass the CODE_OFF_BIT to generators
unless other nocode purposes are set.

This reverts commit cad87395.

Also in 128_run_atexit.c:
avoid line output disorder which may happen on windows when
tcc itself and runned code are using two different printf
implementations and tcc would print the "[Returns 1]" above
any output from the runned test.

We have that define already in tcc.h
and changing the define in tcc.h breaks compilation of tcc
without this fix.

--
Regards ... Detlef

The generated code by yarpgen failed. I traced the problem to
expr_landor. The problem was that nocode_wanted was removing
too much code.
See also testcase 33.

The yarpgen test code uses very complex expressions.

The problem was that enums can also be present in vset_VT_JMP.
Also see testcode.

the optimization of a ternary op with two boolean operands had
the same problem (as in the last commit) of loosing the type.

the casted type was lost when a delayed bool was finally converted
to a value.  See testcase, in the wrong case the '(unsigned int)' cast
was ignored, and hence the division was signed reulting in -1 instead of
the proper 0x7fffffff.