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<html>
<title>
LLVM: llvmgcc tool
</title>
<body>
<center>
<h1>LLVM: llvmgcc tool</h1>
</center>
<HR>
<h3>
NAME
</h3>
llvmgcc
<h3>
SYNOPSIS
</h3>
llvmgcc [options] filename
<h3>
DESCRIPTION
</h3>
The llvmgcc command is the LLVM C front end. It is a modified version of GCC
that takes C programs and compiles them into LLVM bytecode or assembly
language, depending upon the options.
<p>
The llvmgcc program uses the LLVM assembler gccas and the LLVM linker gccld to
do the work of creating complete programs.
<p>
Being derived from the GNU Compiler Collection, llvmgcc has many of gcc's
features and accepts most of gcc's options. It handles a number of gcc's
extensions to the C programming language.
<p>
Below you will find several commonly used options:
<h3>
OPTIONS
</h3>
<ul>
<li> -S
<br>
Do not generate an LLVM bytecode file. Rather, compile the source file
into an LLVM assembly language file.
<p>
<li> -c
<br>
Do not generate a linked bytecode executable. Rather, compile the source
file into an LLVM bytecode file. This bytecode file can then be linked
with other bytecode files later to generate a full LLVM executable.
<p>
<li> -o <i>filename</i>
<br>
Specify the output file to be <i>filename</i>. If <i>filename</i> is -,
then llvmgcc sends its output to standard output.
<p>
<li> -I <i>directory</i>
<br>
Add a directory to the header file search path. This option can be
repeated.
<p>
<li> -L <i>directory</i>
<br>
Add <i>directory</i> to the library search path. This option can be
repeated.
<p>
<li> -l<i>name</i>
<br>
Link in the library lib<i>name</i>.[bc | a | so]. This library should be
a bytecode library.
<p>
<li>-Wl,<i>option</i>
<br>
Pass <i>option</i> to the linker (usually gccld).
<p>
</ul>
<h3>
EXIT STATUS
</h3>
If llvmgcc succeeds, it will exit with 0. Otherwise, if an error occurs, it
will exit with a non-zero value.
<h3>
SEE ALSO
</h3>
<A HREF="llvmgxx.html">llvmg++</A>,
<A HREF="gccas.html">gccas</A>,
<A HREF="gccld.html">gccld</A>
<HR>
<a href="http://llvm.cs.uiuc.edu">LLVM Team</a>
</body>
</html>
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