| .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. llvm-gcc does not support #pragma optimization_level supported by Darwin 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. |
| .It Fl fno-honor-nans |
| Allow optimizations for floating-point arithmetic that assume that arguments and results are not NaNs. |
| |
| The default is -fhonor-nans. |
| .It Fl fno-honor-infinites |
| Allow optimizations for floating-point arithmetic that assume that arguments and results are not +-Infs. |
| |
| The default is -fhonor-infinites. |
| .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 |
