llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-15 20:29:48 +00:00

History

Peter Collingbourne 1568175235 Go bindings: make various DIBuilder arguments optional. r234262 changed some code in DIBuilderBindings.cpp to use the unwrap function to unwrap debug metadata. The problem with this is that unwrap asserts that its argument is non-null, which is not what we want in a number of places in DIBuilder where the argument is optional. This change makes certain arguments optional by adding null checks in places where it is required, fixing the llgo build. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234428 91177308-0d34-0410-b5e6-96231b3b80d8		2015-04-08 20:18:57 +00:00
..
llvm	Go bindings: make various DIBuilder arguments optional.	2015-04-08 20:18:57 +00:00
build.sh	Expose LLVM version string via macro in llvm-config.h, and modify Go bindings	2014-11-19 03:34:17 +00:00
conftest.go
README.txt

README.txt

This directory contains LLVM bindings for the Go programming language
(http://golang.org).

Prerequisites
-------------

* Go 1.2+.
* CMake (to build LLVM).

Using the bindings
------------------

The package path "llvm.org/llvm/bindings/go/llvm" can be used to
import the latest development version of LLVM from SVN. Paths such as
"llvm.org/llvm.v36/bindings/go/llvm" refer to released versions of LLVM.

It is recommended to use the "-d" flag with "go get" to download the
package or a dependency, as an additional step is required to build LLVM
(see "Building LLVM" below).

Building LLVM
-------------

The script "build.sh" in this directory can be used to build LLVM and prepare
it to be used by the bindings. If you receive an error message from "go build"
like this:

    ./analysis.go:4:84: fatal error: llvm-c/Analysis.h: No such file or directory
     #include <llvm-c/Analysis.h> // If you are getting an error here read bindings/go/README.txt

or like this:

    ./llvm_dep.go:5: undefined: run_build_sh

it means that LLVM needs to be built or updated by running the script.

    $ $GOPATH/src/llvm.org/llvm/bindings/go/build.sh

Any command line arguments supplied to the script are passed to LLVM's CMake
build system. A good set of arguments to use during development are:

    $ $GOPATH/src/llvm.org/llvm/bindings/go/build.sh -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD=host -DBUILD_SHARED_LIBS=ON

Note that CMake keeps a cache of build settings so once you have built
LLVM there is no need to pass these arguments again after updating.

Alternatively, you can build LLVM yourself, but you must then set the
CGO_CPPFLAGS, CGO_CXXFLAGS and CGO_LDFLAGS environment variables:

    $ export CGO_CPPFLAGS="`/path/to/llvm-build/bin/llvm-config --cppflags`"
    $ export CGO_CXXFLAGS=-std=c++11
    $ export CGO_LDFLAGS="`/path/to/llvm-build/bin/llvm-config --ldflags --libs --system-libs all`"
    $ go build -tags byollvm