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.\" ========================================================================
.\"
.IX Title "TCC 1"
.TH TCC 1 "2018-03-15" "0.9.27" "Tiny C Compiler"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
tcc \- Tiny C Compiler
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
usage: tcc [options] [\fIinfile1\fR \fIinfile2\fR...] [\fB\-run\fR \fIinfile\fR \fIargs\fR...]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\s-1TCC\s0 options are a very much like gcc options. The main difference is that \s-1TCC\s0
can also execute directly the resulting program and give it runtime
arguments.
.PP
Here are some examples to understand the logic:
.ie n .IP """\fBtcc \-run a.c\fP""" 4
.el .IP "\f(CW\f(CBtcc \-run a.c\f(CW\fR" 4
.IX Item "tcc -run a.c"
Compile \fIa.c\fR and execute it directly
.ie n .IP """\fBtcc \-run a.c arg1\fP""" 4
.el .IP "\f(CW\f(CBtcc \-run a.c arg1\f(CW\fR" 4
.IX Item "tcc -run a.c arg1"
Compile a.c and execute it directly. arg1 is given as first argument to
the \f(CW\*(C`main()\*(C'\fR of a.c.
.ie n .IP """\fBtcc a.c \-run b.c arg1\fP""" 4
.el .IP "\f(CW\f(CBtcc a.c \-run b.c arg1\f(CW\fR" 4
.IX Item "tcc a.c -run b.c arg1"
Compile \fIa.c\fR and \fIb.c\fR, link them together and execute them. arg1 is given
as first argument to the \f(CW\*(C`main()\*(C'\fR of the resulting program.
.ie n .IP """\fBtcc \-o myprog a.c b.c\fP""" 4
.el .IP "\f(CW\f(CBtcc \-o myprog a.c b.c\f(CW\fR" 4
.IX Item "tcc -o myprog a.c b.c"
Compile \fIa.c\fR and \fIb.c\fR, link them and generate the executable \fImyprog\fR.
.ie n .IP """\fBtcc \-o myprog a.o b.o\fP""" 4
.el .IP "\f(CW\f(CBtcc \-o myprog a.o b.o\f(CW\fR" 4
.IX Item "tcc -o myprog a.o b.o"
link \fIa.o\fR and \fIb.o\fR together and generate the executable \fImyprog\fR.
.ie n .IP """\fBtcc \-c a.c\fP""" 4
.el .IP "\f(CW\f(CBtcc \-c a.c\f(CW\fR" 4
.IX Item "tcc -c a.c"
Compile \fIa.c\fR and generate object file \fIa.o\fR.
.ie n .IP """\fBtcc \-c asmfile.S\fP""" 4
.el .IP "\f(CW\f(CBtcc \-c asmfile.S\f(CW\fR" 4
.IX Item "tcc -c asmfile.S"
Preprocess with C preprocess and assemble \fIasmfile.S\fR and generate
object file \fIasmfile.o\fR.
.ie n .IP """\fBtcc \-c asmfile.s\fP""" 4
.el .IP "\f(CW\f(CBtcc \-c asmfile.s\f(CW\fR" 4
.IX Item "tcc -c asmfile.s"
Assemble (but not preprocess) \fIasmfile.s\fR and generate object file
\&\fIasmfile.o\fR.
.ie n .IP """\fBtcc \-r \-o ab.o a.c b.c\fP""" 4
.el .IP "\f(CW\f(CBtcc \-r \-o ab.o a.c b.c\f(CW\fR" 4
.IX Item "tcc -r -o ab.o a.c b.c"
Compile \fIa.c\fR and \fIb.c\fR, link them together and generate the object file \fIab.o\fR.
.PP
Scripting:
.PP
\&\s-1TCC\s0 can be invoked from \fIscripts\fR, just as shell scripts. You just
need to add \f(CW\*(C`#!/usr/local/bin/tcc \-run\*(C'\fR at the start of your C source:
.PP
.Vb 2
\&        #!/usr/local/bin/tcc \-run
\&        #include <stdio.h>
\&        
\&        int main() 
\&        {
\&            printf("Hello World\en");
\&            return 0;
\&        }
.Ve
.PP
\&\s-1TCC\s0 can read C source code from \fIstandard input\fR when \fB\-\fR is used in 
place of \fBinfile\fR. Example:
.PP
.Vb 1
\&        echo \*(Aqmain(){puts("hello");}\*(Aq | tcc \-run \-
.Ve
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-c\fR" 4
.IX Item "-c"
Generate an object file.
.IP "\fB\-o outfile\fR" 4
.IX Item "-o outfile"
Put object file, executable, or dll into output file \fIoutfile\fR.
.IP "\fB\-run source [args...]\fR" 4
.IX Item "-run source [args...]"
Compile file \fIsource\fR and run it with the command line arguments
\&\fIargs\fR. In order to be able to give more than one argument to a
script, several \s-1TCC\s0 options can be given \fIafter\fR the
\&\fB\-run\fR option, separated by spaces:
.Sp
.Vb 1
\&        tcc "\-run \-L/usr/X11R6/lib \-lX11" ex4.c
.Ve
.Sp
In a script, it gives the following header:
.Sp
.Vb 1
\&        #!/usr/local/bin/tcc \-run \-L/usr/X11R6/lib \-lX11
.Ve
.IP "\fB\-v\fR" 4
.IX Item "-v"
Display \s-1TCC\s0 version.
.IP "\fB\-vv\fR" 4
.IX Item "-vv"
Show included files.  As sole argument, print search dirs.  \-vvv shows tries too.
.IP "\fB\-bench\fR" 4
.IX Item "-bench"
Display compilation statistics.
.PP
Preprocessor options:
.IP "\fB\-Idir\fR" 4
.IX Item "-Idir"
Specify an additional include path. Include paths are searched in the
order they are specified.
.Sp
System include paths are always searched after. The default system
include paths are: \fI/usr/local/include\fR, \fI/usr/include\fR
and \fIPREFIX/lib/tcc/include\fR. (\fI\s-1PREFIX\s0\fR is usually
\&\fI/usr\fR or \fI/usr/local\fR).
.IP "\fB\-Dsym[=val]\fR" 4
.IX Item "-Dsym[=val]"
Define preprocessor symbol \fBsym\fR to
val. If val is not present, its value is \fB1\fR. Function-like macros can
also be defined: \fB\-DF(a)=a+1\fR
.IP "\fB\-Usym\fR" 4
.IX Item "-Usym"
Undefine preprocessor symbol \fBsym\fR.
.IP "\fB\-E\fR" 4
.IX Item "-E"
Preprocess only, to stdout or file (with \-o).
.PP
Compilation flags:
.PP
Note: each of the following options has a negative form beginning with
\&\fB\-fno\-\fR.
.IP "\fB\-funsigned\-char\fR" 4
.IX Item "-funsigned-char"
Let the \f(CW\*(C`char\*(C'\fR type be unsigned.
.IP "\fB\-fsigned\-char\fR" 4
.IX Item "-fsigned-char"
Let the \f(CW\*(C`char\*(C'\fR type be signed.
.IP "\fB\-fno\-common\fR" 4
.IX Item "-fno-common"
Do not generate common symbols for uninitialized data.
.IP "\fB\-fleading\-underscore\fR" 4
.IX Item "-fleading-underscore"
Add a leading underscore at the beginning of each C symbol.
.IP "\fB\-fms\-extensions\fR" 4
.IX Item "-fms-extensions"
Allow a \s-1MS C\s0 compiler extensions to the language. Currently this
assumes a nested named structure declaration without an identifier
behaves like an unnamed one.
.IP "\fB\-fdollars\-in\-identifiers\fR" 4
.IX Item "-fdollars-in-identifiers"
Allow dollar signs in identifiers
.PP
Warning options:
.IP "\fB\-w\fR" 4
.IX Item "-w"
Disable all warnings.
.PP
Note: each of the following warning options has a negative form beginning with
\&\fB\-Wno\-\fR.
.IP "\fB\-Wimplicit\-function\-declaration\fR" 4
.IX Item "-Wimplicit-function-declaration"
Warn about implicit function declaration.
.IP "\fB\-Wunsupported\fR" 4
.IX Item "-Wunsupported"
Warn about unsupported \s-1GCC\s0 features that are ignored by \s-1TCC.\s0
.IP "\fB\-Wwrite\-strings\fR" 4
.IX Item "-Wwrite-strings"
Make string constants be of type \f(CW\*(C`const char *\*(C'\fR instead of \f(CW\*(C`char
*\*(C'\fR.
.IP "\fB\-Werror\fR" 4
.IX Item "-Werror"
Abort compilation if warnings are issued.
.IP "\fB\-Wall\fR" 4
.IX Item "-Wall"
Activate all warnings, except \fB\-Werror\fR, \fB\-Wunusupported\fR and
\&\fB\-Wwrite\-strings\fR.
.PP
Linker options:
.IP "\fB\-Ldir\fR" 4
.IX Item "-Ldir"
Specify an additional static library path for the \fB\-l\fR option. The
default library paths are \fI/usr/local/lib\fR, \fI/usr/lib\fR and \fI/lib\fR.
.IP "\fB\-lxxx\fR" 4
.IX Item "-lxxx"
Link your program with dynamic library libxxx.so or static library
libxxx.a. The library is searched in the paths specified by the
\&\fB\-L\fR option and \fB\s-1LIBRARY_PATH\s0\fR variable.
.IP "\fB\-Bdir\fR" 4
.IX Item "-Bdir"
Set the path where the tcc internal libraries (and include files) can be
found (default is \fIPREFIX/lib/tcc\fR).
.IP "\fB\-shared\fR" 4
.IX Item "-shared"
Generate a shared library instead of an executable.
.IP "\fB\-soname name\fR" 4
.IX Item "-soname name"
set name for shared library to be used at runtime
.IP "\fB\-static\fR" 4
.IX Item "-static"
Generate a statically linked executable (default is a shared linked
executable).
.IP "\fB\-rdynamic\fR" 4
.IX Item "-rdynamic"
Export global symbols to the dynamic linker. It is useful when a library
opened with \f(CW\*(C`dlopen()\*(C'\fR needs to access executable symbols.
.IP "\fB\-r\fR" 4
.IX Item "-r"
Generate an object file combining all input files.
.IP "\fB\-Wl,\-rpath=path\fR" 4
.IX Item "-Wl,-rpath=path"
Put custom search path for dynamic libraries into executable.
.IP "\fB\-Wl,\-\-enable\-new\-dtags\fR" 4
.IX Item "-Wl,--enable-new-dtags"
When putting a custom search path for dynamic libraries into the executable,
create the new \s-1ELF\s0 dynamic tag \s-1DT_RUNPATH\s0 instead of the old legacy \s-1DT_RPATH.\s0
.IP "\fB\-Wl,\-\-oformat=fmt\fR" 4
.IX Item "-Wl,--oformat=fmt"
Use \fIfmt\fR as output format. The supported output formats are:
.RS 4
.ie n .IP """elf32\-i386""" 4
.el .IP "\f(CWelf32\-i386\fR" 4
.IX Item "elf32-i386"
\&\s-1ELF\s0 output format (default)
.ie n .IP """binary""" 4
.el .IP "\f(CWbinary\fR" 4
.IX Item "binary"
Binary image (only for executable output)
.ie n .IP """coff""" 4
.el .IP "\f(CWcoff\fR" 4
.IX Item "coff"
\&\s-1COFF\s0 output format (only for executable output for TMS320C67xx target)
.RE
.RS 4
.RE
.IP "\fB\-Wl,\-subsystem=console/gui/wince/...\fR" 4
.IX Item "-Wl,-subsystem=console/gui/wince/..."
Set type for \s-1PE\s0 (Windows) executables.
.IP "\fB\-Wl,\-[Ttext=# | section\-alignment=# | file\-alignment=# | image\-base=# | stack=#]\fR" 4
.IX Item "-Wl,-[Ttext=# | section-alignment=# | file-alignment=# | image-base=# | stack=#]"
Modify executable layout.
.IP "\fB\-Wl,\-Bsymbolic\fR" 4
.IX Item "-Wl,-Bsymbolic"
Set \s-1DT_SYMBOLIC\s0 tag.
.IP "\fB\-Wl,\-(no\-)whole\-archive\fR" 4
.IX Item "-Wl,-(no-)whole-archive"
Turn on/off linking of all objects in archives.
.PP
Debugger options:
.IP "\fB\-g\fR" 4
.IX Item "-g"
Generate run time debug information so that you get clear run time
error messages: \f(CW\*(C` test.c:68: in function \*(Aqtest5()\*(Aq: dereferencing
invalid pointer\*(C'\fR instead of the laconic \f(CW\*(C`Segmentation
fault\*(C'\fR.
.IP "\fB\-b\fR" 4
.IX Item "-b"
Generate additional support code to check
memory allocations and array/pointer bounds. \fB\-g\fR is implied. Note
that the generated code is slower and bigger in this case.
.Sp
Note: \fB\-b\fR is only available on i386 when using libtcc for the moment.
.IP "\fB\-bt N\fR" 4
.IX Item "-bt N"
Display N callers in stack traces. This is useful with \fB\-g\fR or
\&\fB\-b\fR.
.PP
Misc options:
.IP "\fB\-MD\fR" 4
.IX Item "-MD"
Generate makefile fragment with dependencies.
.IP "\fB\-MF depfile\fR" 4
.IX Item "-MF depfile"
Use \fIdepfile\fR as output for \-MD.
.IP "\fB\-print\-search\-dirs\fR" 4
.IX Item "-print-search-dirs"
Print the configured installation directory and a list of library
and include directories tcc will search.
.IP "\fB\-dumpversion\fR" 4
.IX Item "-dumpversion"
Print version.
.PP
Target specific options:
.IP "\fB\-mms\-bitfields\fR" 4
.IX Item "-mms-bitfields"
Use an algorithm for bitfield alignment consistent with \s-1MSVC.\s0 Default is
gcc's algorithm.
.IP "\fB\-mfloat\-abi (\s-1ARM\s0 only)\fR" 4
.IX Item "-mfloat-abi (ARM only)"
Select the float \s-1ABI.\s0 Possible values: \f(CW\*(C`softfp\*(C'\fR and \f(CW\*(C`hard\*(C'\fR
.IP "\fB\-mno\-sse\fR" 4
.IX Item "-mno-sse"
Do not use sse registers on x86_64
.IP "\fB\-m32, \-m64\fR" 4
.IX Item "-m32, -m64"
Pass command line to the i386/x86_64 cross compiler.
.PP
Note: \s-1GCC\s0 options \fB\-Ox\fR, \fB\-fx\fR and \fB\-mx\fR are
ignored.
.SH "ENVIRONMENT"
.IX Header "ENVIRONMENT"
Environment variables that affect how tcc operates.
.IP "\fB\s-1CPATH\s0\fR" 4
.IX Item "CPATH"
.PD 0
.IP "\fBC_INCLUDE_PATH\fR" 4
.IX Item "C_INCLUDE_PATH"
.PD
A colon-separated list of directories searched for include files,
directories given with \fB\-I\fR are searched first.
.IP "\fB\s-1LIBRARY_PATH\s0\fR" 4
.IX Item "LIBRARY_PATH"
A colon-separated list of directories searched for libraries for the
\&\fB\-l\fR option, directories given with \fB\-L\fR are searched first.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIcpp\fR\|(1),
\&\fIgcc\fR\|(1)
.SH "AUTHOR"
.IX Header "AUTHOR"
Fabrice Bellard