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Thomas Preud'homme e3e5d4ad7a Disable C99 VLA when alloca is unavailable.
* Disable C99 VLA detection when alloca is unavailable and protect the
  new reference to TOK_alloca in decl_initializer in order to compile
  and run for architecture without working alloca.

  Not all code of C99 VLA is commented as it would required many ifdef
  stanza. Just the detection is commented so that VT_VLA is never set
  any type and the C99 VLA code is compiled but never called. However
  vpush_global_sym(&func_old_type, TOK_alloca) in decl_initializer needs
  to be protected by an ifdef stanza as well because it uses TOK_alloca.

* include alloca and C99 VLA tests according to availability of
  TOK_alloca instead of relying on the current architecture
2011-02-04 15:24:48 +01:00
examples Avoid crash with "Avoid a crash with weak symbols for "make test"" 2010-06-30 20:25:04 +02:00
include Support struct arguments with stdarg.h 2010-12-28 19:32:40 +09:00
lib lib/alloca*: mark ELF stack access flags as nonexecutable 2011-01-04 10:38:52 +02:00
tests Disable C99 VLA when alloca is unavailable. 2011-02-04 15:24:48 +01:00
win32 tiny_libmaker: strip leading directory to avoid buffer overrun 2010-12-04 16:56:58 +01:00
.gitignore .gitignore += tags 2010-06-21 20:49:46 +04:00
COPYING changed license to LGPL 2003-05-24 14:18:56 +00:00
Changelog Implement C99 Variable Length Arrays 2011-02-04 02:22:25 +01:00
Makefile Makefile: respect LDFLAGS (set via --extra-ldflags=) 2011-01-04 10:22:02 +02:00
README win32: readme.txt->tcc-win32.txt, update tcc-doc 2009-04-18 15:08:03 +02:00
TODO Implement C99 Variable Length Arrays 2011-02-04 02:22:25 +01:00
VERSION update Changelog, bump version: 0.9.25 2009-05-11 19:01:26 +02:00
arm-gen.c ARM: use uint32_t for opcodes 2010-05-13 22:17:09 +02:00
c67-gen.c allow tcc be build from separate objects 2009-12-20 01:53:49 +01:00
coff.h C67 COFF executable format support (TK) 2004-10-05 22:33:55 +00:00
configure configure: --sharedir defaults to /usr/local/share 2010-12-23 06:36:07 -08:00
elf.h Add support for indirect functions as externals. 2010-08-09 20:20:09 +02:00
i386-asm.c tccasm: accept bracketed offset expressions 2011-02-01 15:53:48 -08:00
i386-asm.h tccasm: accept "fmul/fadd st(0),st(n)" (dietlibc ipow/atanh) 2011-02-01 15:49:37 -08:00
i386-gen.c chmod a-x i386-gen.c 2010-06-16 14:37:30 +04:00
i386-tok.h integrate x86_64-asm.c into i386-asm.c 2009-12-19 22:16:20 +01:00
il-gen.c cleanup: constify some global data 2009-07-18 22:07:42 +02:00
il-opcodes.h added CIL target 2002-02-10 16:14:03 +00:00
libtcc.c add -isystem cmdline option 2011-02-01 23:32:53 -08:00
libtcc.h tcc: Draft suppoprt for -MD/-MF options 2010-06-21 20:49:02 +04:00
stab.def added 2002-12-08 14:36:36 +00:00
stab.h added 2002-12-08 14:36:36 +00:00
tcc-doc.texi Reorder increasingly VT_* constants in tcc.h 2011-02-04 02:22:25 +01:00
tcc.c tcc: add sysinclude path with -B, like gcc does 2011-02-02 00:00:12 -08:00
tcc.h Reorder increasingly VT_* constants in tcc.h 2011-02-04 02:22:25 +01:00
tccasm.c tccasm: support .weak labels 2011-02-01 08:43:54 -08:00
tcccoff.c tccelf/tcccoff: fix some type conversion warnings 2010-12-04 16:48:15 +01:00
tccelf.c One more fix for tcc -run 2010-12-28 17:44:51 +09:00
tccgen.c Disable C99 VLA when alloca is unavailable. 2011-02-04 15:24:48 +01:00
tccpe.c split cross libtcc1.a to separate directories 2010-12-02 03:08:57 -08:00
tccpp.c tccpp: fix bug in handling of recursive macros 2011-02-01 13:23:40 -08:00
tccrun.c selinux: correct ftruncate, fix bus error in tcc -run 2010-10-27 03:54:12 -07:00
tcctok.h Make TOK_alloca available for x86-64 2011-02-04 13:25:38 +01:00
texi2pod.pl automatic man page generation from tcc-doc.texi 2003-05-18 18:11:06 +00:00
x86_64-asm.h x86-64: fix udiv, add cqto instruction 2009-12-19 22:16:19 +01:00
x86_64-gen.c Make alignments for struct arguments 8 bytes 2010-12-28 19:09:59 +09:00

README

Tiny C Compiler - C Scripting Everywhere - The Smallest ANSI C compiler
-----------------------------------------------------------------------

Features:
--------

- SMALL! You can compile and execute C code everywhere, for example on
  rescue disks.

- FAST! tcc generates optimized x86 code. No byte code
  overhead. Compile, assemble and link about 7 times faster than 'gcc
  -O0'.

- UNLIMITED! Any C dynamic library can be used directly. TCC is
  heading torward full ISOC99 compliance. TCC can of course compile
  itself.

- SAFE! tcc includes an optional memory and bound checker. Bound
  checked code can be mixed freely with standard code.

- Compile and execute C source directly. No linking or assembly
  necessary. Full C preprocessor included. 

- C script supported : just add '#!/usr/local/bin/tcc -run' at the first
  line of your C source, and execute it directly from the command
  line.

Documentation:
-------------

1) Installation on a i386 Linux host (for Windows read tcc-win32.txt)

   ./configure
   make
   make test
   make install

By default, tcc is installed in /usr/local/bin.
./configure --help  shows configuration options.


2) Introduction

We assume here that you know ANSI C. Look at the example ex1.c to know
what the programs look like.

The include file <tcclib.h> can be used if you want a small basic libc
include support (especially useful for floppy disks). Of course, you
can also use standard headers, although they are slower to compile.

You can begin your C script with '#!/usr/local/bin/tcc -run' on the first
line and set its execute bits (chmod a+x your_script). Then, you can
launch the C code as a shell or perl script :-) The command line
arguments are put in 'argc' and 'argv' of the main functions, as in
ANSI C.

3) Examples

ex1.c: simplest example (hello world). Can also be launched directly
as a script: './ex1.c'.

ex2.c: more complicated example: find a number with the four
operations given a list of numbers (benchmark).

ex3.c: compute fibonacci numbers (benchmark).

ex4.c: more complicated: X11 program. Very complicated test in fact
because standard headers are being used !

ex5.c: 'hello world' with standard glibc headers.

tcc.c: TCC can of course compile itself. Used to check the code
generator.

tcctest.c: auto test for TCC which tests many subtle possible bugs. Used
when doing 'make test'.

4) Full Documentation

Please read tcc-doc.html to have all the features of TCC.

Additional information is available for the Windows port in tcc-win32.txt.

License:
-------

TCC is distributed under the GNU Lesser General Public License (see
COPYING file).

Fabrice Bellard.