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Building LLDB
=============
1. Clone the llvm, clang, and lldb repos like this:
llvm
|
`-- tools
|
+-- clang
|
`-- lldb
```
cd $HOME
git clone http://llvm.org/git/llvm.git
cd $HOME/llvm/tools
git clone http://llvm.org/git/clang.git
git clone http://llvm.org/git/lldb.git
```
2. Checkout the "release_38" branches in llvm/clang/lldb:
```
cd $HOME/llvm
git checkout release_38
cd $HOME/llvm/tools/clang
git checkout release_38
cd $HOME/llvm/tools/lldb
git checkout release_38
```
3. Install the prerequisites:
For Linux (Debian or Ubuntu):
```
sudo apt-get install build-essential subversion swig python2.7-dev libedit-dev libncurses5-dev
```
For OSX, the latest Xcode needs to be installed and I use Homebrew to install the rest:
```
brew install python swig doxygen ocaml
```
There may be more prerequisites required, when building the cmake files it should let
you know if there are any I missed.
See http://lldb.llvm.org/build.html for more details on these preliminaries.
4. If building on OSX, carefully following the signing directions (before you build)
here: $HOME/llvm/tools/lldb/docs/code-signing.txt. Even though those build directions
say to use Xcode to build lldb, I never got it to work, but cmake/make works.
5. Building the cmake files (you can build either debug or release or both).
For debug:
```
mkdir -p $HOME/build/debug
cd $HOME/build/debug
cmake -DCMAKE_BUILD_TYPE=debug $HOME/llvm
```
For release:
```
mkdir -p $HOME/build/release
cd $HOME/build/release
cmake -DCMAKE_BUILD_TYPE=release $HOME/llvm
```
6. Build lldb (release was picked in this example, but can be replaced with "debug"):
```
cd $HOME/build/release/tools/lldb
make -j16
```
When you build with -j16 (parallel build with 16 jobs), sometimes it fails. Just start again with just make.
For OS X, building in remote ssh shell won't sign properly, use a terminal window on the machine itself.
7. To use the newly built lldb and to build the coreclr SOS plugin for it, set these environment variables in your .profile:
```
export LLDB_INCLUDE_DIR=$HOME/llvm/tools/lldb/include
export LLDB_LIB_DIR=$HOME/build/release/lib
PATH=$HOME/build/release/bin:$PATH
```
For OS X also set:
```
export LLDB_DEBUGSERVER_PATH=$HOME/build/release/bin/debugserver
```
It also seems to be necessary to run lldb as superuser e.g. `sudo -E $HOME/build/release/bin/lldb` (the -E is necessary so the above debug server environment variable is passed) if using a remote ssh, but it isn't necessary if run it in a local terminal session.
|
