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145 lines
3.0 KiB
Plaintext
145 lines
3.0 KiB
Plaintext
=pod
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=head1 NAME
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llvmc - The LLVM Compiler Driver (WIP)
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=head1 SYNOPSIS
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B<llvmc> [I<options>] I<filenames...>
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=head1 DESCRIPTION
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B<llvmc> is a configurable driver for invoking other LLVM (and non-LLVM) tools
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in order to compile, optimize and link software for multiple languages. For
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those familiar with FSF's B<gcc> tool, it is very similar. Please note that
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B<llvmc> is considered an experimental tool.
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=head1 OPTIONS
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=head2 Built-in Options
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LLVMC has some built-in options that can't be overridden in the
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configuration libraries.
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=over
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=item B<-o> I<filename>
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Output file name.
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=item B<-x> I<language>
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Specify the language of the following input files until the next B<-x>
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option.
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=item B<-load> I<plugin_name>
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Load the specified plugin DLL. Example:
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S<-load $LLVM_DIR/Release/lib/LLVMCSimple.so>.
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=item B<-v> or B<--verbose>
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Enable verbose mode, i.e. print out all executed commands.
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=item B<--view-graph>
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Show a graphical representation of the compilation graph. Requires
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that you have I<dot> and I<gv> programs installed. Hidden option,
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useful for debugging.
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=item B<--write-graph>
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Write a I<compilation-graph.dot> file in the current directory with
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the compilation graph description in the Graphviz format. Hidden
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option, useful for debugging.
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=item B<--save-temps>
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Write temporary files to the current directory and do not delete them
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on exit. Hidden option, useful for debugging.
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=item B<--help>
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Print a summary of command-line options and exit.
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=item B<--help-hidden>
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Print a summary of command-line options and exit. Print help even for
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options intended for developers.
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=item B<--version>
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Print version information and exit.
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=back
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=head2 Control Options
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By default, LLVMC is built with some standard configuration libraries
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that define the following options:
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=over
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=item B<-clang>
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Use Clang instead of llvm-gcc.
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=item B<-opt>
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Enable optimization with B<opt>.
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=item B<-I> I<directory>
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Add a directory to the header file search path. This option can be
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repeated.
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=item B<-L> I<directory>
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Add I<directory> to the library search path. This option can be
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repeated.
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=item B<-l>I<name>
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Link in the library libI<name>.[bc | a | so]. This library should
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be a bitcode library.
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=item B<-emit-llvm>
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Make the output be LLVM bitcode (with B<-c>) or assembly (with B<-S>) instead
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of native object (or assembly). If B<-emit-llvm> is given without either B<-c>
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or B<-S> it has no effect.
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=item B<-Wa>
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Pass options to assembler.
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=item B<-Wl>
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Pass options to linker.
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=item B<-Wo>
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Pass options to opt.
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=back
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=head1 EXIT STATUS
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If B<llvmc> succeeds, it will exit with code 0. Otherwise, if an
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error occurs, it will exit with a non-zero value. If one of the
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compilation tools returns a non-zero status, pending actions will be
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discarded and B<llvmc> will return the same result code as the failing
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compilation tool.
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=head1 SEE ALSO
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L<llvm-gcc|llvmgcc>, L<llvm-g++|llvmgxx>, L<llvm-as|llvm-as>,
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L<llvm-dis|llvm-dis>, L<llc|llc>, L<llvm-link|llvm-link>
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=head1 AUTHORS
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Maintained by the LLVM Team (L<http://llvm.org>).
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=cut
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