4 llgo is a Go (http://golang.org) frontend for LLVM, written in Go.
6 llgo is under active development. It compiles and passes most of the
7 standard library test suite and a substantial portion of the gc test suite,
8 but there are some corner cases that are known not to be handled correctly
9 yet. Nevertheless it can compile modestly substantial programs (including
10 itself; it is self hosting on x86-64 Linux).
12 Mailing list: https://groups.google.com/d/forum/llgo-dev
17 llgo is currently only supported on the x86-64 Linux platform. Contributions
18 that add support for other platforms are welcome.
20 There are two components which would need to be ported to new platforms: the
21 compiler and the runtime library. The compiler has little platform-specific
22 code; the most significant is in irgen/cabi.go. The main limiting factor
23 for new platforms is the runtime library in third_party/gofrontend/libgo,
24 which inherits some support for other platforms from the gc compiler's
25 runtime library, but this support tends to be incomplete.
32 * CMake 2.8.8 or later (to build LLVM).
33 * A modern C++ toolchain (to build LLVM).
34 http://llvm.org/docs/GettingStarted.html#getting-a-modern-host-c-toolchain
36 Note that Ubuntu Precise is one Linux distribution which does not package
37 a sufficiently new CMake or C++ toolchain.
39 To build and install llgo:
42 svn co http://llvm.org/svn/llvm-project/llvm/trunk /path/to/llvm
45 cd /path/to/llvm/tools
46 svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
49 svn co http://llvm.org/svn/llvm-project/llgo/trunk llgo
51 # Build LLVM, Clang and llgo: (see also http://llvm.org/docs/CMake.html)
52 mkdir /path/to/llvm-build
53 cd /path/to/llvm-build
54 cmake /path/to/llvm -DCMAKE_INSTALL_PREFIX=/path/to/llvm-inst
60 llgo-go is llgo's version of the "go" command. It has the same command line
61 interface as go, and works the same way, but it uses llgo to compile.
63 llgoi is an interactive REPL for Go. It supports expressions, statements, most
64 declarations and imports, including binary imports from the standard library
65 and source imports from $GOPATH. See docs/llgoi.rst for more information.
67 llgo is the compiler binary. It has a command line interface that is intended
68 to be compatible to a large extent with gccgo.
73 Changes to code outside the third_party directory should be contributed in
74 the normal way by sending patches to <llvm-commits@lists.llvm.org>.
76 Changes to code in the third_party directory must first be made in the
77 respective upstream project, from which they will be mirrored into the llgo
78 repository. See the script update_third_party.sh for the locations of the
79 upstream projects and details of how the mirroring works.