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| LLVM: llvmgcc tool |
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| <center> |
| <h1>LLVM: <tt>llvmgcc</tt> tool</h1> |
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| <h3>NAME</h3> |
| <tt>llvmgcc</tt> |
| |
| <h3> |
| SYNOPSIS |
| </h3> |
| |
| <tt>llvmgcc [options] filename</tt> |
| <h3> |
| DESCRIPTION |
| </h3> |
| |
| The <tt>llvmgcc</tt> command is the LLVM C front end. It is a modified version |
| of the <a href="http://gcc.gnu.org">GNU Compiler Collection</a> (GCC) 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>llvmgcc</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>llvmgcc</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 GCC, 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>. |
| <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 program, <a |
| href="gccld.html"><tt>gccld</tt></a>. |
| <p> |
| </ul> |
| |
| <h3> |
| EXIT STATUS |
| </h3> |
| |
| If <tt>llvmgcc</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="llvmgxx.html"><tt>llvmg++</tt></A>, |
| <A HREF="gccas.html"><tt>gccas</tt></A>, |
| <A HREF="gccld.html"><tt>gccld</tt></A>, |
| and the Info documentation for <tt>gcc</tt>. |
| |
| <HR> |
| Maintained by the <a href="http://llvm.cs.uiuc.edu">LLVM Team</a>. |
| </body> |
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