tcc - Tiny C Compiler
usage: tcc [options] [
infile1 infile2...] [
-run
infile args...]
TCC options are a very much like gcc options. The main difference is that TCC
can also execute directly the resulting program and give it runtime arguments.
Here are some examples to understand the logic:
- "tcc -run a.c"
- Compile a.c and execute it directly
- "tcc -run a.c arg1"
- Compile a.c and execute it directly. arg1 is given as first argument to
the "main()" of a.c.
- "tcc a.c -run b.c arg1"
- Compile a.c and b.c, link them together and execute them.
arg1 is given as first argument to the "main()" of the resulting
program.
- "tcc -o myprog a.c b.c"
- Compile a.c and b.c, link them and generate the executable
myprog.
- "tcc -o myprog a.o b.o"
- link a.o and b.o together and generate the executable
myprog.
- "tcc -c a.c"
- Compile a.c and generate object file a.o.
- "tcc -c asmfile.S"
- Preprocess with C preprocess and assemble asmfile.S and generate
object file asmfile.o.
- "tcc -c asmfile.s"
- Assemble (but not preprocess) asmfile.s and generate object file
asmfile.o.
- "tcc -r -o ab.o a.c b.c"
- Compile a.c and b.c, link them together and generate the
object file ab.o.
Scripting:
TCC can be invoked from
scripts, just as shell scripts. You just need to
add "#!/usr/local/bin/tcc -run" at the start of your C source:
#!/usr/local/bin/tcc -run
#include <stdio.h>
int main()
{
printf("Hello World\n");
return 0;
}
TCC can read C source code from
standard input when
- is used in
place of
infile. Example:
echo 'main(){puts("hello");}' | tcc -run -
- -c
- Generate an object file.
- -o outfile
- Put object file, executable, or dll into output file outfile.
- -run source [args...]
- Compile file source and run it with the command line arguments
args. In order to be able to give more than one argument to a
script, several TCC options can be given after the -run
option, separated by spaces:
tcc "-run -L/usr/X11R6/lib -lX11" ex4.c
In a script, it gives the following header:
#!/usr/local/bin/tcc -run -L/usr/X11R6/lib -lX11
- -v
- Display TCC version.
- -vv
- Show included files. As sole argument, print search dirs. -vvv shows tries
too.
- -bench
- Display compilation statistics.
Preprocessor options:
- -Idir
- Specify an additional include path. Include paths are searched in the
order they are specified.
System include paths are always searched after. The default system include
paths are: /usr/local/include, /usr/include and
PREFIX/lib/tcc/include. ( PREFIX is usually /usr or
/usr/local).
- -Dsym[=val]
- Define preprocessor symbol sym to val. If val is not present, its
value is 1. Function-like macros can also be defined:
-DF(a)=a+1
- -Usym
- Undefine preprocessor symbol sym.
- -E
- Preprocess only, to stdout or file (with -o).
Compilation flags:
Note: each of the following options has a negative form beginning with
-fno-.
- -funsigned-char
- Let the "char" type be unsigned.
- -fsigned-char
- Let the "char" type be signed.
- -fno-common
- Do not generate common symbols for uninitialized data.
- -fleading-underscore
- Add a leading underscore at the beginning of each C symbol.
- -fms-extensions
- Allow a MS C compiler extensions to the language. Currently this assumes a
nested named structure declaration without an identifier behaves like an
unnamed one.
- -fdollars-in-identifiers
- Allow dollar signs in identifiers
Warning options:
- -w
- Disable all warnings.
Note: each of the following warning options has a negative form beginning with
-Wno-.
- -Wimplicit-function-declaration
- Warn about implicit function declaration.
- -Wunsupported
- Warn about unsupported GCC features that are ignored by TCC.
- -Wwrite-strings
- Make string constants be of type "const char *" instead of
"char *".
- -Werror
- Abort compilation if warnings are issued.
- -Wall
- Activate all warnings, except -Werror, -Wunusupported and
-Wwrite-strings.
Linker options:
- -Ldir
- Specify an additional static library path for the -l option. The
default library paths are /usr/local/lib, /usr/lib and
/lib.
- -lxxx
- Link your program with dynamic library libxxx.so or static library
libxxx.a. The library is searched in the paths specified by the -L
option and LIBRARY_PATH variable.
- -Bdir
- Set the path where the tcc internal libraries (and include files) can be
found (default is PREFIX/lib/tcc).
- -shared
- Generate a shared library instead of an executable.
- -soname name
- set name for shared library to be used at runtime
- -static
- Generate a statically linked executable (default is a shared linked
executable).
- -rdynamic
- Export global symbols to the dynamic linker. It is useful when a library
opened with "dlopen()" needs to access executable symbols.
- -r
- Generate an object file combining all input files.
- -Wl,-rpath=path
- Put custom search path for dynamic libraries into executable.
- -Wl,--enable-new-dtags
- When putting a custom search path for dynamic libraries into the
executable, create the new ELF dynamic tag DT_RUNPATH instead of the old
legacy DT_RPATH.
- -Wl,--oformat=fmt
- Use fmt as output format. The supported output formats are:
- "elf32-i386"
- ELF output format (default)
- "binary"
- Binary image (only for executable output)
- "coff"
- COFF output format (only for executable output for TMS320C67xx
target)
- -Wl,-subsystem=console/gui/wince/...
- Set type for PE (Windows) executables.
- -Wl,-[Ttext=# | section-alignment=# | file-alignment=# | image-base=# |
stack=#]
- Modify executable layout.
- -Wl,-Bsymbolic
- Set DT_SYMBOLIC tag.
- -Wl,-(no-)whole-archive
- Turn on/off linking of all objects in archives.
Debugger options:
- -g
- Generate run time debug information so that you get clear run time error
messages: " test.c:68: in function 'test5()': dereferencing invalid
pointer" instead of the laconic "Segmentation fault".
- -b
- Generate additional support code to check memory allocations and
array/pointer bounds. -g is implied. Note that the generated code
is slower and bigger in this case.
Note: -b is only available on i386 when using libtcc for the
moment.
- -bt N
- Display N callers in stack traces. This is useful with -g or
-b.
Misc options:
- -MD
- Generate makefile fragment with dependencies.
- -MF depfile
- Use depfile as output for -MD.
- -print-search-dirs
- Print the configured installation directory and a list of library and
include directories tcc will search.
- -dumpversion
- Print version.
Target specific options:
- -mms-bitfields
- Use an algorithm for bitfield alignment consistent with MSVC. Default is
gcc's algorithm.
- -mfloat-abi (ARM only)
- Select the float ABI. Possible values: "softfp" and
"hard"
- -mno-sse
- Do not use sse registers on x86_64
- -m32, -m64
- Pass command line to the i386/x86_64 cross compiler.
Note: GCC options
-Ox,
-fx and
-mx are ignored.
Environment variables that affect how tcc operates.
- CPATH
- C_INCLUDE_PATH
- A colon-separated list of directories searched for include files,
directories given with -I are searched first.
- LIBRARY_PATH
- A colon-separated list of directories searched for libraries for the
-l option, directories given with -L are searched
first.
cpp(1),
gcc(1)
Fabrice Bellard