b202f00c12
Track down (almost) all places that might trigger deserialization of declarations and wrap it with cling::PushTransactionRAII. I could solve it much more elegantly by putting that RAII in the callback of the ExternalASTSource, but I wanted to be verbose and denote all the places that trigger deserializations in ROOT. This will help us in future optimize this code, because we want to deserialize as rare as possible. This should make roottest a bit happier.
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1. I N S T A L L A T I O N I N S T R U C T I O N S
1.1 Dependencies
CLING source depends on the LLVM [1] and CLANG [2] headers and libraries.
You will also need CMake [3] >= 2.6.1 or GNU Make to build all of those
packages and subversion [4] to get the source code.
[1] http://llvm.org
[2] http://clang.llvm.org
[3] http://cmake.org
[4] http://subversion.tigris.org/
1.2 Building
To build LLVM and CLANG you must:
* Check out the sources:
mkdir src
cd src
svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
cd llvm/tools
svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
svn co http://root.cern.ch/svn/root/trunk/interpreter/cling cling
cd ..
* Apply some patches
cat tools/cling/patches/* | patch -p0
* Configure, build and install them, either using CMake:
cd ..
mkdir build
cd build
cmake -DCMAKE_INSTALL_PREFIX=/some/install/dir \
-DLLVM_TARGETS_TO_BUILD=CBackend\;CppBackend\;X86 \
-DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_CXX_COMPILER=`which c++` \
-DCMAKE_C_COMPILER=`which gcc` \
../llvm
make
make install
or GNU Make (see ../src/configure --help for all options):
cd ..
mkdir build
cd build
../llvm/configure --prefix=/some/install/dir
make
make install
2. U S A G E
To interpret a C file type: "./cling test.c". To invoke cling in the
interactive mode type "cling" without file name. Use ".L filename" to
load libraries or C++ files. Type C++ code at the prompt to interpret it.