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<html>
<title>
LLVM: llvmg++ tool
</title>
<body bgcolor=white>
<center>
<h1>LLVM: <tt>llvmg++</tt> tool</h1>
</center>
<HR>
<h3>NAME</h3>
<tt>llvmg++</tt>
<h3>SYNOPSIS</h3>
<tt>llvmg++ [options] filename</tt>
<h3>DESCRIPTION</h3>
The <tt>llvmg++</tt> command is the LLVM C++ front end. It is a modified
version of g++ that takes C++ programs and compiles them into LLVM bytecode or
assembly language, depending upon the options.
<p>
Unless the <tt>-S</tt> option is specified, <tt>llvmg++</tt> will use the
<a href="gccas.html"><tt>gccas</tt></a> program to perform some optimizations
and create an LLVM bytecode file. Unless the <tt>-c</tt> option is specified,
<tt>llvmg++</tt> will also use the <a href="gccld.html"><tt>gccld</tt></a>
program to perform further optimizations and link the resulting bytecode
file(s) with support libraries to create an executable program.
<p>
Being derived from the <a href="http://gcc.gnu.org">GNU Compiler Collection</a>,
<tt>llvmg++</tt> has many of g++'s features and accepts most of g++'s options.
It handles a number of g++'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 executable. Rather, compile the source file
into an LLVM bytecode file. This bytecode file can then be linked with
other bytecode files later on to generate a full LLVM executable.
<p>
<li> -o <i>filename</i>
<br>
Specify the output file to be <i>filename</i>.
<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 <tt>llvmg++</tt> 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="llvmgcc.html"><tt>llvmg++</tt></A>,
<A HREF="gccas.html"><tt>gccas</tt></A>,
<A HREF="gccld.html"><tt>gccld</tt></A>
<HR>
Maintained by the <a href="http://llvm.cs.uiuc.edu">LLVM Team</a>.
</body>
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