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llgo ==== llgo is a Go (http://golang.org) frontend for LLVM, written in Go. llgo is under active development. It compiles and passes most of the standard library test suite and a substantial portion of the gc test suite, but there are some corner cases that are known not to be handled correctly yet. Nevertheless it can compile modestly substantial programs (including itself; it is self hosting on x86-64 Linux). Mailing list: https://groups.google.com/d/forum/llgo-dev Supported platforms ------------------- llgo is currently only supported on the x86-64 Linux platform. Contributions that add support for other platforms are welcome. There are two components which would need to be ported to new platforms: the compiler and the runtime library. The compiler has little platform-specific code; the most significant is in irgen/cabi.go. The main limiting factor for new platforms is the runtime library in third_party/gofrontend/libgo, which inherits some support for other platforms from the gc compiler's runtime library, but this support tends to be incomplete. Installation ------------ llgo requires: * Go 1.3 or later. * CMake 2.8.8 or later (to build LLVM). * A modern C++ toolchain (to build LLVM). http://llvm.org/docs/GettingStarted.html#getting-a-modern-host-c-toolchain Note that Ubuntu Precise is one Linux distribution which does not package a sufficiently new CMake or C++ toolchain. To build and install llgo: # Checkout LLVM: svn co http://llvm.org/svn/llvm-project/llvm/trunk /path/to/llvm # Checkout Clang: cd /path/to/llvm/tools svn co http://llvm.org/svn/llvm-project/cfe/trunk clang # Checkout llgo: svn co http://llvm.org/svn/llvm-project/llgo/trunk llgo # Build LLVM, Clang and llgo: (see also http://llvm.org/docs/CMake.html) mkdir /path/to/llvm-build cd /path/to/llvm-build cmake /path/to/llvm -DCMAKE_INSTALL_PREFIX=/path/to/llvm-inst make install Running ------- llgo-go is llgo's version of the "go" command. It has the same command line interface as go, and works the same way, but it uses llgo to compile. llgoi is an interactive REPL for Go. It supports expressions, statements, most declarations and imports, including binary imports from the standard library and source imports from $GOPATH. See docs/llgoi.rst for more information. llgo is the compiler binary. It has a command line interface that is intended to be compatible to a large extent with gccgo. Contributing ------------ Changes to code outside the third_party directory should be contributed in the normal way by sending patches to <llvm-commits@lists.llvm.org>. Changes to code in the third_party directory must first be made in the respective upstream project, from which they will be mirrored into the llgo repository. See the script update_third_party.sh for the locations of the upstream projects and details of how the mirroring works.
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