Bootstrappable TCC/TinyCC -- Tiny C Compiler's bootstrappable fork
Bootstrappable TCC is a fork from mainline TCC development, that
started spring 2017 from
Author: Aron BARATH <email@example.com>
Date: Tue May 16 07:03:26 2017 +0200
the R_X86_64_GOTOFF64 relocation was missing
and can be compiled by MesCC (https://gnu.org/s/mes).
Initially the plan was to make TinyCC itself "bootstrappable"
The best way to do so would be to gradually simplify the
implementation of TinyCC by restricting the use of language constructs
to a well-defined subset of C. In bootstrapping each stage or
compiler adds functionality; a compiler that is written in itself --a
so-called `self-hosting' compiler--is not considered to be
At the time this vision was not received with much enthousiasm
so I decided to fork TinyCC and instead grow MesCC (a bootstrappable
sub-C compiler in a subset of Guile Scheme) into a full C99 compiler.
Currently, the Reduced Binary Seed Bootstrap of the GNU Guix System
The fork consists of about 12 patches
cee58e0 build: Support building from bootstrap-mes.
39de356 bootstrappable: Force static link.
2b6271d bootstrappable: Work around MesCC bug.
379c62d bootstrappable: add tcc.h include guards to include location.
274bd06 bootstrappable: Handle libtcc1.a.
6ae9aa4 bootstrappable: Skip tidy_section_headers.
a130ce1 bootstrappable: HAVE_FLOAT.
de906df bootstrappable: HAVE_BITFIELD.
540ba0b bootstrappable: HAVE_LONG_LONG.
306f677 bootstrappable: Work around Nyacc-0.80.42 bug.
9c97705 build: bootstrap build scripts.
584478f bootstrappable: Remove non-free grep test.
that work around bugs and missing C language features in MesCC. Only
three of these are really interesting: the HAVE_* patches that allow
for stepwise introduction of bitfields, doubles/floats and long longs.
In time, I hope we can remove the need for this fork; either by
upstreaming some bootstrappable work or else by maturing MesCC.
At the time of writing, mainline (non-bootstrappable) tinycc lives
Tiny C Compiler - C Scripting Everywhere - The Smallest ANSI C compiler
- SMALL! You can compile and execute C code everywhere, for example on
- FAST! tcc generates optimized x86 code. No byte code
overhead. Compile, assemble and link about 7 times faster than 'gcc
- UNLIMITED! Any C dynamic library can be used directly. TCC is
heading torward full ISOC99 compliance. TCC can of course compile
- 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
1) Installation on a i386/x86_64/arm Linux/OSX/FreeBSD host
Notes: For OSX and FreeBSD, 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
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
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
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.
TCC is distributed under the GNU Lesser General Public License (see