.Dd December 11, 2008
.Dt llvm-gcc 1
.Os Darwin
.Sh NAME
.Nm llvm-gcc
.Sh SYNOPSIS
llvm-gcc  [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR]
          [\fB\-g\fR] [\fB\-pg\fR] [\fB\-O\fR\fIlevel\fR]
          [\fB\-W\fR\fIwarn\fR...] [\fB\-pedantic\fR]
          [\fB\-I\fR\fIdir\fR...] [\fB\-L\fR\fIdir\fR...]
          [\fB\-D\fR\fImacro\fR[=\fIdefn\fR]...] [\fB\-U\fR\fImacro\fR]
          [\fB\-f\fR\fIoption\fR...] [\fB\-m\fR\fImachine-option\fR...]
          [\fB\-o\fR \fIoutfile\fR] \fIinfile\fR...

llvm-g++  [\fB\-c\fR|\fB\-S\fR|\fB\-E\fR] [\fB\-std=\fR\fIstandard\fR]
          [\fB\-g\fR] [\fB\-pg\fR] [\fB\-O\fR\fIlevel\fR]
          [\fB\-W\fR\fIwarn\fR...] [\fB\-pedantic\fR]
          [\fB\-I\fR\fIdir\fR...] [\fB\-L\fR\fIdir\fR...]
          [\fB\-D\fR\fImacro\fR[=\fIdefn\fR]...] [\fB\-U\fR\fImacro\fR]
          [\fB\-f\fR\fIoption\fR...] [\fB\-m\fR\fImachine-option\fR...]
          [\fB\-o\fR \fIoutfile\fR] \fIinfile\fR...
.Sh DESCRIPTION
llvm-gcc is a C, C++, Objective-C and Objective-C++ compiler. llvm-g++ is a compiler driver for C++. llvm-gcc uses gcc front-end and gcc's command line interface. Consult the cc(1) man page for command line options supported by llvm-gcc. Only selected LLVM specific options are listed here.
.Pp
.Bl -tag -width -indent
.It Fl flto
Enables Link Time Optimization. Link Time Optimization is performed by ld(1) transparently using the LLVM optimizer. The object file generated contains intermediate LLVM bitcode instead of Mach-O objects. This option disables debugging information.
.It Fl O4
Enables Link Time Optimization in addition to all optimizations enabled at -O3.
.It Fl O
Unlike gcc, -O means -O2 instead of -O1.
.El
.Pp
.Sh SEE ALSO 
.Xr cc 1, 
.Xr ld 1 
.\" .Sh BUGS              \" Document known, unremedied bugs 
.\" .Sh HISTORY           \" Document history if command behaves in a unique manner