llvm−gcc − LLVM C front−end
llvm-gcc [options] filename
The llvm-gcc command is the LLVM C front end. It is a modified version of gcc that compiles C/ObjC programs into native objects, LLVM bitcode or LLVM assembly language, depending upon the options.
By default, llvm-gcc compiles to native objects just like GCC does. If the −emit−llvm option is given then it will generate LLVM bitcode files instead. If −S (assembly) is also given, then it will generate LLVM assembly.
Being derived from the GNU Compiler Collection, llvm-gcc 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.
−−help
Print a summary of command line options.
−S |
Do not generate an LLVM bitcode file. Rather, compile the source file into an LLVM assembly language file. |
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−c |
Do not generate a linked executable. Rather, compile the source file into an LLVM bitcode file. This bitcode file can then be linked with other bitcode files later on to generate a full LLVM executable. |
−o filename
Specify the output file to be filename.
−I directory
Add a directory to the header file search path. This option can be repeated.
−L directory
Add directory to the library search path. This option can be repeated.
−lname
Link in the library libname.[bc | a | so]. This library should be a bitcode library.
−emit−llvm
Make the output be LLVM bitcode (or assembly) instead of native object (or assembly).
If llvm-gcc succeeds, it will exit with 0. Otherwise, if an error occurs, it will exit with a non-zero value.
llvm−g++
Maintained by the LLVM Team (<http://llvm.org>).