Paze AI a3dfe7cb24 feat: 调试信息/优化验证/C23/JIT/VSIX 五项功能
1. -g 调试信息 (DWARF5)
   - config.h 启用 CONFIG_DWARF_VERSION 5
   - 生成 .debug_info/.debug_line/.debug_str 等现代调试节
   - 函数/变量/行号信息完整 (GDB/VS Code 可调试)

2. 代码优化器验证
   - 常量折叠: 2+3 → movl \ (编译期计算)
   - 死代码消除: if(0) 分支移除
   - 不可达代码: i>1000 分支消除
   - __OPTIMIZE__ 宏正确设置

3. C23 新特性 (-std=c2x/-std=c23)
   - __STDC_VERSION__ = 202311L
   - nullptr 关键字 + nullptr_t 类型
   - typeof 泛型 (已有 GNU 扩展)

4. libpcc JIT 演示 (examples/jit_demo.c)
   - 运行时编译 C 代码字符串
   - pcc_set_output_type(MEMORY) JIT 模式
   - 调用宿主函数/访问宿主变量
   - 验证: jit_run(10) 返回 55

5. VS Code 插件打包
   - 修复 package.json 结构 (contributes 嵌套)
   - 生成 pcc-language-support-0.1.0.vsix (5.9 KB)
   - 语法高亮 + 构建/运行命令
2026-08-16 15:43:37 +08:00

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 machine code for i386, x86_64, arm, aarch64 or
  riscv64.  Compiles and links about 10 times faster than 'gcc -O0'.

- UNLIMITED! Any C dynamic library can be used directly. TCC is
  heading toward 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 Linux, BSD variants or macOS hosts:

   ./configure
   make
   make test
   make install

   Notes: On BSD hosts, gmake should be used instead of make.
   For Windows read tcc-win32.txt.

makeinfo must be installed to compile the doc.  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 ! As for ex1.c, can also be launched
directly as a script: './ex4.c'.

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 for the Windows port is in tcc-win32.txt.

License:
-------

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

Fabrice Bellard.
S
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